The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation
Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, bu...
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| Autor*in: |
Yipeng Guo [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of climate - Boston, Mass. [u.a.] : AMS, 1988, 29(2016), 15, Seite 2625-5641 |
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| Übergeordnetes Werk: |
volume:29 ; year:2016 ; number:15 ; pages:2625-5641 |
| Links: |
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| DOI / URN: |
10.1175/JCLI-D-15-0025.1 |
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| 520 | |a Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. | ||
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| 700 | 0 | |a Cheng Sun |4 oth | |
| 700 | 0 | |a Jiayu Zheng |4 oth | |
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10.1175/JCLI-D-15-0025.1 doi PQ20161012 (DE-627)OLC198290643X (DE-599)GBVOLC198290643X (PRQ)c988-4836786b5a02fd216a99cf5744db54303e5b7f1845508eda4193af50e7a34bdf0 (KEY)0166131020160000029001502625multidecadalvariabilityoftheasymmetricmodeofthebor DE-627 ger DE-627 rakwb eng 550 DE-600 UA 4548 AVZ rvk 38.82 bkl Yipeng Guo verfasserin aut The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. Studies Summer Precipitation Trends General circulation models Climate Jianping Li oth Juan Feng oth Fei Xie oth Cheng Sun oth Jiayu Zheng oth Enthalten in Journal of climate Boston, Mass. [u.a.] : AMS, 1988 29(2016), 15, Seite 2625-5641 (DE-627)129622311 (DE-600)246750-1 (DE-576)018141331 0894-8755 nnns volume:29 year:2016 number:15 pages:2625-5641 http://dx.doi.org/10.1175/JCLI-D-15-0025.1 Volltext http://search.proquest.com/docview/1813108328 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-FOR SSG-OPC-GGO GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2010 GBV_ILN_2012 UA 4548 38.82 AVZ AR 29 2016 15 2625-5641 |
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10.1175/JCLI-D-15-0025.1 doi PQ20161012 (DE-627)OLC198290643X (DE-599)GBVOLC198290643X (PRQ)c988-4836786b5a02fd216a99cf5744db54303e5b7f1845508eda4193af50e7a34bdf0 (KEY)0166131020160000029001502625multidecadalvariabilityoftheasymmetricmodeofthebor DE-627 ger DE-627 rakwb eng 550 DE-600 UA 4548 AVZ rvk 38.82 bkl Yipeng Guo verfasserin aut The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. Studies Summer Precipitation Trends General circulation models Climate Jianping Li oth Juan Feng oth Fei Xie oth Cheng Sun oth Jiayu Zheng oth Enthalten in Journal of climate Boston, Mass. [u.a.] : AMS, 1988 29(2016), 15, Seite 2625-5641 (DE-627)129622311 (DE-600)246750-1 (DE-576)018141331 0894-8755 nnns volume:29 year:2016 number:15 pages:2625-5641 http://dx.doi.org/10.1175/JCLI-D-15-0025.1 Volltext http://search.proquest.com/docview/1813108328 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-FOR SSG-OPC-GGO GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2010 GBV_ILN_2012 UA 4548 38.82 AVZ AR 29 2016 15 2625-5641 |
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10.1175/JCLI-D-15-0025.1 doi PQ20161012 (DE-627)OLC198290643X (DE-599)GBVOLC198290643X (PRQ)c988-4836786b5a02fd216a99cf5744db54303e5b7f1845508eda4193af50e7a34bdf0 (KEY)0166131020160000029001502625multidecadalvariabilityoftheasymmetricmodeofthebor DE-627 ger DE-627 rakwb eng 550 DE-600 UA 4548 AVZ rvk 38.82 bkl Yipeng Guo verfasserin aut The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. Studies Summer Precipitation Trends General circulation models Climate Jianping Li oth Juan Feng oth Fei Xie oth Cheng Sun oth Jiayu Zheng oth Enthalten in Journal of climate Boston, Mass. [u.a.] : AMS, 1988 29(2016), 15, Seite 2625-5641 (DE-627)129622311 (DE-600)246750-1 (DE-576)018141331 0894-8755 nnns volume:29 year:2016 number:15 pages:2625-5641 http://dx.doi.org/10.1175/JCLI-D-15-0025.1 Volltext http://search.proquest.com/docview/1813108328 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-FOR SSG-OPC-GGO GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2010 GBV_ILN_2012 UA 4548 38.82 AVZ AR 29 2016 15 2625-5641 |
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10.1175/JCLI-D-15-0025.1 doi PQ20161012 (DE-627)OLC198290643X (DE-599)GBVOLC198290643X (PRQ)c988-4836786b5a02fd216a99cf5744db54303e5b7f1845508eda4193af50e7a34bdf0 (KEY)0166131020160000029001502625multidecadalvariabilityoftheasymmetricmodeofthebor DE-627 ger DE-627 rakwb eng 550 DE-600 UA 4548 AVZ rvk 38.82 bkl Yipeng Guo verfasserin aut The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. Studies Summer Precipitation Trends General circulation models Climate Jianping Li oth Juan Feng oth Fei Xie oth Cheng Sun oth Jiayu Zheng oth Enthalten in Journal of climate Boston, Mass. [u.a.] : AMS, 1988 29(2016), 15, Seite 2625-5641 (DE-627)129622311 (DE-600)246750-1 (DE-576)018141331 0894-8755 nnns volume:29 year:2016 number:15 pages:2625-5641 http://dx.doi.org/10.1175/JCLI-D-15-0025.1 Volltext http://search.proquest.com/docview/1813108328 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-FOR SSG-OPC-GGO GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2010 GBV_ILN_2012 UA 4548 38.82 AVZ AR 29 2016 15 2625-5641 |
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10.1175/JCLI-D-15-0025.1 doi PQ20161012 (DE-627)OLC198290643X (DE-599)GBVOLC198290643X (PRQ)c988-4836786b5a02fd216a99cf5744db54303e5b7f1845508eda4193af50e7a34bdf0 (KEY)0166131020160000029001502625multidecadalvariabilityoftheasymmetricmodeofthebor DE-627 ger DE-627 rakwb eng 550 DE-600 UA 4548 AVZ rvk 38.82 bkl Yipeng Guo verfasserin aut The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. Studies Summer Precipitation Trends General circulation models Climate Jianping Li oth Juan Feng oth Fei Xie oth Cheng Sun oth Jiayu Zheng oth Enthalten in Journal of climate Boston, Mass. [u.a.] : AMS, 1988 29(2016), 15, Seite 2625-5641 (DE-627)129622311 (DE-600)246750-1 (DE-576)018141331 0894-8755 nnns volume:29 year:2016 number:15 pages:2625-5641 http://dx.doi.org/10.1175/JCLI-D-15-0025.1 Volltext http://search.proquest.com/docview/1813108328 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-FOR SSG-OPC-GGO GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2010 GBV_ILN_2012 UA 4548 38.82 AVZ AR 29 2016 15 2625-5641 |
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The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. 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multidecadal variability of the asymmetric mode of the boreal autumn hadley circulation and its link to the atlantic multidecadal oscillation |
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The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation |
| abstract |
Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. |
| abstractGer |
Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. |
| abstract_unstemmed |
Previous studies show that the first principal mode of the variability of the seasonal mean Hadley circulation (HC) is anequatorial asymmetric mode (AM) with long-term trend.This study demonstrates that the variability of the boreal autumn [September-November (SON)] HC is also dominated by an AM, but with multidecadal variability. The SON AM has ascending and descending branches located at approximately 20°N and 20°S, respectively,and explainsabout40%ofthetotalvariance.Furtheranalysisreveals thattheAMiscloselylinked to the Atlantic multidecadal oscillation (AMO), which is associated with a large cross-equatorial sea surface temperature (SST)gradient and sea levelpressure (SLP)gradient. The cross-equatorial thermal contrast further induces an equatorial asymmetric HC anomaly. Numerical simulations conducted on an atmospheric general circulation model also suggest that AMO-associated SST anomalies can also induce a cross-equatorial SLP gradient and anomalous vertical shear of the meridional wind at the equator, both of which indicate asymmetric HCanomaly. Therefore, the AM ofthe variability of the boreal autumn HC hasclose links to the AMO.Further analysis demonstrates that the AMO in SON has a closer relationship with AM than those in the other seasons. A possible reason is that the AMO-associated zonal mean SST anomaly in the tropics has differences among the four seasons, which leads to different atmospheric circulation responses. The AM in SON has inversed impacts on the tropical precipitation, suggesting that the precipitation difference between the northern and southern tropics has multidecadal variability. |
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The Multidecadal Variability of the Asymmetric Mode of the Boreal Autumn Hadley Circulation and Its Link to the Atlantic Multidecadal Oscillation |
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