Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean
North Atlanic mesoscale eddies heat flux freshwater flux.
Gespeichert in:
| Autor*in: |
Müller, Vasco [verfasserIn] |
|---|---|
| Körperschaften: |
Universität Bremen [Grad-verleihende Institution] |
| Hochschulschrift: |
Dissertation ; Universität Bremen ; 2017 |
| Format: |
E-Book |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
Bremen: 2017 |
|---|
| Formangabe: |
Hochschulschrift |
|---|
| Umfang: |
1 Online-Ressource (x, 126 Seiten) ; Illustrationen |
|---|
| Weitere Ausgabe: |
Erscheint auch als Druck-Ausgabe Müller, Vasco: Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean - Bremen, 2017 |
|---|
| Links: |
|---|
| DOI / URN: |
urn:nbn:de:gbv:46-00106142-11 |
|---|
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| 520 | |a North Atlanic mesoscale eddies heat flux freshwater flux. | ||
| 520 | |a This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. | ||
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The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. 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The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. Langzeitarchivierung gewährleistet pdager Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Müller, Vasco Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean Bremen, 2017 x, 126 Seiten (DE-627)1001297326 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 Resolving-System kostenfrei Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 2017-11-01 Resolving-System Volltext http://d-nb.info/1142314375/34 2017-11-01 Langzeitarchivierung Nationalbibliothek Volltext http://elib.suub.uni-bremen.de/edocs/00106142-1.pdf 2017-11-01 Verlag kostenfrei Volltext GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_65 ISIL_DE-3 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER BO 20 01 0084 172021672X x 03-11-17 21 01 0046 1717760902 ebook_2017_dissbremen Kostenloser Zugriff zza 24-10-17 22 01 0018 1720247943 SUBolrd xu 03-11-17 23 01 0830 1720262101 olr-d x 03-11-17 30 01 0104 1720273634 z 03-11-17 40 01 0007 1720286108 xsn 03-11-17 60 01 0705 1720302073 OLRD z 03-11-17 63 01 3401 1720315108 ORD x 03-11-17 65 01 0003 4168077926 GBV-ODiss Open Access z 17-07-22 70 01 0089 1720324301 zdo 03-11-17 105 01 0841 172041422X z 03-11-17 110 01 3110 1720340595 x 03-11-17 132 01 0959 1720352097 OLR-DISS x 03-11-17 151 01 0546 3583696026 OLR-ODISS z 31-01-20 161 01 0960 172036611X ORD x 03-11-17 293 01 3293 1720396426 ORD xf 03-11-17 370 01 4370 1720406359 x 03-11-17 2403 01 DE-LFER 3476434745 00 --%%-- --%%-- n --%%-- l01 16-05-19 20 01 0084 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 21 01 0046 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 LF 22 01 0018 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 23 01 0830 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 30 01 0104 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 40 01 0007 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 60 01 0705 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 63 01 3401 E-Book http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 LF 65 01 0003 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 70 01 0089 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 105 01 0841 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 110 01 3110 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 132 01 0959 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 151 01 0546 Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 161 01 0960 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 293 01 3293 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 370 01 4370 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 2403 01 DE-LFER http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 21 00 DE-46 00 Universität Bremen 21 00 DE-46 00 Fachbereich 01: Physik/Elektrotechnik (FB 01) 21 00 DE-46 99 93 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2017_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 65 01 0003 GBV-ODiss 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2017-11-03:10:42:49 |
| allfields_unstemmed |
17,O11 dnb 1142314375 DE-101 urn:nbn:de:gbv:46-00106142-11 urn (DE-627)100129744X (DE-599)GBV100129744X (OCoLC)1007312567 DE-627 ger DE-627 rda eng XA-DE 550 DE-101 Müller, Vasco verfasserin aut Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean vorgelegt von Vasco Müller Bremen 2017 1 Online-Ressource (x, 126 Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2017 North Atlanic mesoscale eddies heat flux freshwater flux. This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. Langzeitarchivierung gewährleistet pdager Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Müller, Vasco Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean Bremen, 2017 x, 126 Seiten (DE-627)1001297326 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 Resolving-System kostenfrei Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 2017-11-01 Resolving-System Volltext http://d-nb.info/1142314375/34 2017-11-01 Langzeitarchivierung Nationalbibliothek Volltext http://elib.suub.uni-bremen.de/edocs/00106142-1.pdf 2017-11-01 Verlag kostenfrei Volltext GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_65 ISIL_DE-3 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER BO 20 01 0084 172021672X x 03-11-17 21 01 0046 1717760902 ebook_2017_dissbremen Kostenloser Zugriff zza 24-10-17 22 01 0018 1720247943 SUBolrd xu 03-11-17 23 01 0830 1720262101 olr-d x 03-11-17 30 01 0104 1720273634 z 03-11-17 40 01 0007 1720286108 xsn 03-11-17 60 01 0705 1720302073 OLRD z 03-11-17 63 01 3401 1720315108 ORD x 03-11-17 65 01 0003 4168077926 GBV-ODiss Open Access z 17-07-22 70 01 0089 1720324301 zdo 03-11-17 105 01 0841 172041422X z 03-11-17 110 01 3110 1720340595 x 03-11-17 132 01 0959 1720352097 OLR-DISS x 03-11-17 151 01 0546 3583696026 OLR-ODISS z 31-01-20 161 01 0960 172036611X ORD x 03-11-17 293 01 3293 1720396426 ORD xf 03-11-17 370 01 4370 1720406359 x 03-11-17 2403 01 DE-LFER 3476434745 00 --%%-- --%%-- n --%%-- l01 16-05-19 20 01 0084 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 21 01 0046 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 LF 22 01 0018 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 23 01 0830 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 30 01 0104 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 40 01 0007 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 60 01 0705 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 63 01 3401 E-Book http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 LF 65 01 0003 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 70 01 0089 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 105 01 0841 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 110 01 3110 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 132 01 0959 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 151 01 0546 Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 161 01 0960 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 293 01 3293 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 370 01 4370 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 2403 01 DE-LFER http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 21 00 DE-46 00 Universität Bremen 21 00 DE-46 00 Fachbereich 01: Physik/Elektrotechnik (FB 01) 21 00 DE-46 99 93 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2017_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 65 01 0003 GBV-ODiss 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2017-11-03:10:42:49 |
| allfieldsGer |
17,O11 dnb 1142314375 DE-101 urn:nbn:de:gbv:46-00106142-11 urn (DE-627)100129744X (DE-599)GBV100129744X (OCoLC)1007312567 DE-627 ger DE-627 rda eng XA-DE 550 DE-101 Müller, Vasco verfasserin aut Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean vorgelegt von Vasco Müller Bremen 2017 1 Online-Ressource (x, 126 Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2017 North Atlanic mesoscale eddies heat flux freshwater flux. This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. Langzeitarchivierung gewährleistet pdager Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Universität Bremen Grad-verleihende Institution (DE-588)2001386-3 (DE-627)101380429 (DE-576)191575038 dgg Bremen (DE-588)4008135-7 (DE-627)106369636 (DE-576)208874569 uvp Erscheint auch als Druck-Ausgabe Müller, Vasco Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean Bremen, 2017 x, 126 Seiten (DE-627)1001297326 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 Resolving-System kostenfrei Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 2017-11-01 Resolving-System Volltext http://d-nb.info/1142314375/34 2017-11-01 Langzeitarchivierung Nationalbibliothek Volltext http://elib.suub.uni-bremen.de/edocs/00106142-1.pdf 2017-11-01 Verlag kostenfrei Volltext GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_65 ISIL_DE-3 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 GBV_ILN_2403 ISIL_DE-LFER BO 20 01 0084 172021672X x 03-11-17 21 01 0046 1717760902 ebook_2017_dissbremen Kostenloser Zugriff zza 24-10-17 22 01 0018 1720247943 SUBolrd xu 03-11-17 23 01 0830 1720262101 olr-d x 03-11-17 30 01 0104 1720273634 z 03-11-17 40 01 0007 1720286108 xsn 03-11-17 60 01 0705 1720302073 OLRD z 03-11-17 63 01 3401 1720315108 ORD x 03-11-17 65 01 0003 4168077926 GBV-ODiss Open Access z 17-07-22 70 01 0089 1720324301 zdo 03-11-17 105 01 0841 172041422X z 03-11-17 110 01 3110 1720340595 x 03-11-17 132 01 0959 1720352097 OLR-DISS x 03-11-17 151 01 0546 3583696026 OLR-ODISS z 31-01-20 161 01 0960 172036611X ORD x 03-11-17 293 01 3293 1720396426 ORD xf 03-11-17 370 01 4370 1720406359 x 03-11-17 2403 01 DE-LFER 3476434745 00 --%%-- --%%-- n --%%-- l01 16-05-19 20 01 0084 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 21 01 0046 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 LF 22 01 0018 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 23 01 0830 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 30 01 0104 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 40 01 0007 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 60 01 0705 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 63 01 3401 E-Book http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 LF 65 01 0003 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 70 01 0089 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 105 01 0841 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 110 01 3110 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 132 01 0959 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 151 01 0546 Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 161 01 0960 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 293 01 3293 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 370 01 4370 http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 2403 01 DE-LFER http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 21 00 DE-46 00 Universität Bremen 21 00 DE-46 00 Fachbereich 01: Physik/Elektrotechnik (FB 01) 21 00 DE-46 99 93 60 01 0705 10 ho 20 01 0084 OLRD 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2017_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 65 01 0003 GBV-ODiss 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2017-11-03:10:42:49 |
| allfieldsSound |
17,O11 dnb 1142314375 DE-101 urn:nbn:de:gbv:46-00106142-11 urn (DE-627)100129744X (DE-599)GBV100129744X (OCoLC)1007312567 DE-627 ger DE-627 rda eng XA-DE 550 DE-101 Müller, Vasco verfasserin aut Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean vorgelegt von Vasco Müller Bremen 2017 1 Online-Ressource (x, 126 Seiten) Illustrationen Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Dissertation Universität Bremen 2017 North Atlanic mesoscale eddies heat flux freshwater flux. This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. 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Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. 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temperature and freshwater fluxes by individual eddies in the north atlantic ocean |
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Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean |
| abstract |
North Atlanic mesoscale eddies heat flux freshwater flux. This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. |
| abstractGer |
North Atlanic mesoscale eddies heat flux freshwater flux. This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. |
| abstract_unstemmed |
North Atlanic mesoscale eddies heat flux freshwater flux. This study investigates the temperature and freshwater fluxes by individual eddies in the North Atlantic between 40 degrees-55 degrees N and 60 degrees-10 degrees W for the period January 1993 to April 2014. Focus is on a zonal section along 47 degrees N, roughly at the boundary between the subpolar and the subtropical gyres. The main question is to what extent eddies are responsible for the variability and mixing in the region and how the anomalies of temperature and freshwater carried by eddies contribute to the overall fluxes across 47 degrees N. Almost 37000 eddies with a lifetime longer than one week are detected from surface geostrophic velocity fields derived from satellite-altimetry. First, only surface temperature fluxes based on collocating detected eddies with sea surface temperature observations from satellites are analyzed. The results are compared to two model simulations spanning the period from 2002 to 2013 with different horizontal resolution (1/4 degree and 1/12 degree), allowing to assess the impact of different resolution on the results. The analysis is then extended to three dimensional temperature and freshwater fluxes. The temperature and salinity fields used for the calculation of the fluxes stem from a new product that was derived from dynamic height using the Gravest Empirical Mode (GEM) technique. Using this new product allows for the first time to relate every detected eddy to profiles of temperature and freshwater and to analyze the respective fluxes across 47 degrees N. Since the 1/12 degree model configuration shows the more realistic results for the surface temperature fluxes, the comparison of the observed temperature and freshwater fluxes is confined to this configuration. The highest number of eddies is found along the pathway of the North Atlantic Current (NAC), roughly following the 4000 m isobath, and on the Grand Banks of Newfoundland. The typical vertical extent is around 1400 m, with anti-cyclonic eddies on average 200 m deeper than cyclonic eddies. Relating the observed eddies to the top-to-bottom velocity distribution from ship observations shows that the highest fluxes are linked to the fastest and most pronounced current branches in the western Newfoundland Basin. The time series of surface temperature fluxes by eddies crossing 47 degrees N reveal that single isolated eddies with large SST signatures contribute about 25% to the surface temperature flux. Similarly, about 15-35% of the three dimensional temperature and freshwater fluxes across 47 degrees N stem from eddies with large temperature and freshwater anomalies. The largest contribution to the flux by individual eddies stems from cold and fresh eddies originating from the Western Boundary Current moving northward with the NAC. While the fluxes by individual eddies are very small compared to the basin-wide integrated total fluxes, eddies induce a large part of the variability of the total flux. The effect of fluxes by individual eddies is regionally confined, but eddies contribute to the cooling of the NAC in the region around the Grand Banks of Newfoundland, to the local recirculation in the Newfoundland Basin, and in part to the interior southward pathway of subpolar water. |
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| title_short |
Temperature and Freshwater Fluxes by Individual Eddies in the North Atlantic Ocean |
| url |
http://nbn-resolving.de/urn:nbn:de:gbv:46-00106142-11 http://d-nb.info/1142314375/34 http://elib.suub.uni-bremen.de/edocs/00106142-1.pdf |
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7.400448 |