Changes in source waters to the Southern California Bight
Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline wi...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Bograd, Steven J. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015transfer abstract |
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| Schlagwörter: |
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| Umfang: |
11 |
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| Übergeordnetes Werk: |
Enthalten in: THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY - Kaushal, A. ELSEVIER, 2015, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:112 ; year:2015 ; pages:42-52 ; extent:11 |
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| DOI / URN: |
10.1016/j.dsr2.2014.04.009 |
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ELV03468381X |
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| 520 | |a Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. | ||
| 520 | |a Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. | ||
| 650 | 7 | |a California Current System |2 Elsevier | |
| 650 | 7 | |a Water masses |2 Elsevier | |
| 650 | 7 | |a CalCOFI |2 Elsevier | |
| 650 | 7 | |a California Undercurrent |2 Elsevier | |
| 650 | 7 | |a Upwelling |2 Elsevier | |
| 650 | 7 | |a Dissolved oxygen |2 Elsevier | |
| 650 | 7 | |a Inorganic nutrients |2 Elsevier | |
| 700 | 1 | |a Buil, Mercedes Pozo |4 oth | |
| 700 | 1 | |a Lorenzo, Emanuele Di |4 oth | |
| 700 | 1 | |a Castro, Carmen G. |4 oth | |
| 700 | 1 | |a Schroeder, Isaac D. |4 oth | |
| 700 | 1 | |a Goericke, Ralf |4 oth | |
| 700 | 1 | |a Anderson, Clarissa R. |4 oth | |
| 700 | 1 | |a Benitez-Nelson, Claudia |4 oth | |
| 700 | 1 | |a Whitney, Frank A. |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Kaushal, A. ELSEVIER |t THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY |d 2015 |g Amsterdam [u.a.] |w (DE-627)ELV023730552 |
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10.1016/j.dsr2.2014.04.009 doi GBVA2015016000007.pica (DE-627)ELV03468381X (ELSEVIER)S0967-0645(14)00126-X DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 VZ 600 540 VZ Bograd, Steven J. verfasserin aut Changes in source waters to the Southern California Bight 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. California Current System Elsevier Water masses Elsevier CalCOFI Elsevier California Undercurrent Elsevier Upwelling Elsevier Dissolved oxygen Elsevier Inorganic nutrients Elsevier Buil, Mercedes Pozo oth Lorenzo, Emanuele Di oth Castro, Carmen G. oth Schroeder, Isaac D. oth Goericke, Ralf oth Anderson, Clarissa R. oth Benitez-Nelson, Claudia oth Whitney, Frank A. oth Enthalten in Elsevier Science Kaushal, A. ELSEVIER THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY 2015 Amsterdam [u.a.] (DE-627)ELV023730552 volume:112 year:2015 pages:42-52 extent:11 https://doi.org/10.1016/j.dsr2.2014.04.009 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 112 2015 42-52 11 045F 550 |
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10.1016/j.dsr2.2014.04.009 doi GBVA2015016000007.pica (DE-627)ELV03468381X (ELSEVIER)S0967-0645(14)00126-X DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 VZ 600 540 VZ Bograd, Steven J. verfasserin aut Changes in source waters to the Southern California Bight 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. California Current System Elsevier Water masses Elsevier CalCOFI Elsevier California Undercurrent Elsevier Upwelling Elsevier Dissolved oxygen Elsevier Inorganic nutrients Elsevier Buil, Mercedes Pozo oth Lorenzo, Emanuele Di oth Castro, Carmen G. oth Schroeder, Isaac D. oth Goericke, Ralf oth Anderson, Clarissa R. oth Benitez-Nelson, Claudia oth Whitney, Frank A. oth Enthalten in Elsevier Science Kaushal, A. ELSEVIER THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY 2015 Amsterdam [u.a.] (DE-627)ELV023730552 volume:112 year:2015 pages:42-52 extent:11 https://doi.org/10.1016/j.dsr2.2014.04.009 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 112 2015 42-52 11 045F 550 |
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10.1016/j.dsr2.2014.04.009 doi GBVA2015016000007.pica (DE-627)ELV03468381X (ELSEVIER)S0967-0645(14)00126-X DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 VZ 600 540 VZ Bograd, Steven J. verfasserin aut Changes in source waters to the Southern California Bight 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. California Current System Elsevier Water masses Elsevier CalCOFI Elsevier California Undercurrent Elsevier Upwelling Elsevier Dissolved oxygen Elsevier Inorganic nutrients Elsevier Buil, Mercedes Pozo oth Lorenzo, Emanuele Di oth Castro, Carmen G. oth Schroeder, Isaac D. oth Goericke, Ralf oth Anderson, Clarissa R. oth Benitez-Nelson, Claudia oth Whitney, Frank A. oth Enthalten in Elsevier Science Kaushal, A. ELSEVIER THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY 2015 Amsterdam [u.a.] (DE-627)ELV023730552 volume:112 year:2015 pages:42-52 extent:11 https://doi.org/10.1016/j.dsr2.2014.04.009 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 112 2015 42-52 11 045F 550 |
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10.1016/j.dsr2.2014.04.009 doi GBVA2015016000007.pica (DE-627)ELV03468381X (ELSEVIER)S0967-0645(14)00126-X DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 VZ 600 540 VZ Bograd, Steven J. verfasserin aut Changes in source waters to the Southern California Bight 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. California Current System Elsevier Water masses Elsevier CalCOFI Elsevier California Undercurrent Elsevier Upwelling Elsevier Dissolved oxygen Elsevier Inorganic nutrients Elsevier Buil, Mercedes Pozo oth Lorenzo, Emanuele Di oth Castro, Carmen G. oth Schroeder, Isaac D. oth Goericke, Ralf oth Anderson, Clarissa R. oth Benitez-Nelson, Claudia oth Whitney, Frank A. oth Enthalten in Elsevier Science Kaushal, A. ELSEVIER THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY 2015 Amsterdam [u.a.] (DE-627)ELV023730552 volume:112 year:2015 pages:42-52 extent:11 https://doi.org/10.1016/j.dsr2.2014.04.009 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 112 2015 42-52 11 045F 550 |
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10.1016/j.dsr2.2014.04.009 doi GBVA2015016000007.pica (DE-627)ELV03468381X (ELSEVIER)S0967-0645(14)00126-X DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 VZ 600 540 VZ Bograd, Steven J. verfasserin aut Changes in source waters to the Southern California Bight 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. California Current System Elsevier Water masses Elsevier CalCOFI Elsevier California Undercurrent Elsevier Upwelling Elsevier Dissolved oxygen Elsevier Inorganic nutrients Elsevier Buil, Mercedes Pozo oth Lorenzo, Emanuele Di oth Castro, Carmen G. oth Schroeder, Isaac D. oth Goericke, Ralf oth Anderson, Clarissa R. oth Benitez-Nelson, Claudia oth Whitney, Frank A. oth Enthalten in Elsevier Science Kaushal, A. ELSEVIER THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY 2015 Amsterdam [u.a.] (DE-627)ELV023730552 volume:112 year:2015 pages:42-52 extent:11 https://doi.org/10.1016/j.dsr2.2014.04.009 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 112 2015 42-52 11 045F 550 |
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Enthalten in THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY Amsterdam [u.a.] volume:112 year:2015 pages:42-52 extent:11 |
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Enthalten in THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY Amsterdam [u.a.] volume:112 year:2015 pages:42-52 extent:11 |
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THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY |
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Bograd, Steven J. @@aut@@ Buil, Mercedes Pozo @@oth@@ Lorenzo, Emanuele Di @@oth@@ Castro, Carmen G. @@oth@@ Schroeder, Isaac D. @@oth@@ Goericke, Ralf @@oth@@ Anderson, Clarissa R. @@oth@@ Benitez-Nelson, Claudia @@oth@@ Whitney, Frank A. @@oth@@ |
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THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY |
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THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY |
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THE RISK OF OBSTRUCTIVE SLEEP APNEA IN A HEALTHY, MIDDLE-AGED NORTH AMERICAN POPULATION: INSIGHTS FROM THE PRIMARY CARE AUDIT OF GLOBAL RISK MANAGEMENT (PARADIGM) STUDY |
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changes in source waters to the southern california bight |
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Changes in source waters to the Southern California Bight |
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Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. |
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Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. |
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Historical hydrographic data (1984–2012) from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and global reanalysis products were used to quantify recent water mass variability off the coast of Southern California. Dissolved oxygen concentrations continued to decline within the lower pycnocline, concurrent with strong increases in nitrate and phosphate that have spatial patterns matching those of dissolved oxygen. Silicic acid also shows an increasing trend in the offshore portion of the region, but has strong and opposing trends in the upper (increasing) and lower-pycnocline (decreasing) within the Southern California Bight. The varying rates of change in the inorganic nutrients yield a more complex pattern of variability in the nutrient ratios, resulting in large decreases in the N:P and Si:N ratios within the Southern California Bight at depths that provide source waters for upwelling. Basin-scale reanalysis products are consistent with low-frequency water mass changes observed off Southern California and suggest that advection of modified source waters is the cause of the variability. The biogeochemical changes described here may have important impacts on the regional ecosystem, including a reduction of viable pelagic habitat and community reorganization. |
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