Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin
The CARIACO Ocean Time Series program has made monthly measurements of oxygen, nutrients, and carbon system parameters (∑CO2, alkalinity, pH) in the Cariaco Basin since 1996. At the same time, sediment traps have collected settling particles at four to five depths ranging from 150 to 1,200 m. The de...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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The Oceanography Society
2014-03-01
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| Series: | Oceanography |
| Subjects: | |
| Online Access: | http://tos.org/oceanography/archive/27-1_scranton.pdf |
| _version_ | 1831761118014472192 |
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| author | Mary I. Scranton Gordon T. Taylor Robert Thunell Claudia R. Benitez-Nelson Frank Muller-Karger Kent Fanning Laura Lorenzoni Enrique Montes Ramon Varela Yrene Astor |
| author_facet | Mary I. Scranton Gordon T. Taylor Robert Thunell Claudia R. Benitez-Nelson Frank Muller-Karger Kent Fanning Laura Lorenzoni Enrique Montes Ramon Varela Yrene Astor |
| author_sort | Mary I. Scranton |
| collection | DOAJ |
| description | The CARIACO Ocean Time Series program has made monthly measurements of oxygen, nutrients, and carbon system parameters (∑CO2, alkalinity, pH) in the Cariaco Basin since 1996. At the same time, sediment traps have collected settling particles at four to five depths ranging from 150 to 1,200 m. The depth of the transition from oxic to anoxic conditions has fluctuated dramatically over the time series due to changes in the occurrence of Caribbean water intrusions into the deep basin. Nutrient concentrations in the deep basin have increased steadily with time in a proportion reflective of the elemental ratios in the settling organic matter, although N:P ratios in the water column (approximately 16:1) differ from ratios in the accumulating nutrients (11:1) and the settling flux (ranging between 5:1 and 12.5:1). This difference is likely due to changes in the source material for remineralization, either because of sizeable ecosystem changes or changes in the relative importance of the terrestrial input of inorganic P or scavenging of P by mineral precipitation near the oxic/anoxic interface. Alternatively, there may have been changes in the degree of preferential remineralization of P. |
| first_indexed | 2024-12-22T04:43:26Z |
| format | Article |
| id | doaj.art-5e2d03b3010f42438126641b63e17122 |
| institution | Directory Open Access Journal |
| issn | 1042-8275 |
| language | English |
| last_indexed | 2024-12-22T04:43:26Z |
| publishDate | 2014-03-01 |
| publisher | The Oceanography Society |
| record_format | Article |
| series | Oceanography |
| spelling | doaj.art-5e2d03b3010f42438126641b63e171222022-12-21T18:38:41ZengThe Oceanography SocietyOceanography1042-82752014-03-0127114815910.5670/oceanog.2014.18Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco BasinMary I. Scranton0Gordon T. Taylor1Robert Thunell2Claudia R. Benitez-Nelson3Frank Muller-Karger4Kent Fanning5Laura Lorenzoni6Enrique Montes7Ramon Varela8Yrene Astor9Stony Brook UniversityStony Brook UniversityUniversity of South CarolinaUniversity of South CarolinaUniversity of South FloridaUniversity of South FloridaUniversity of South FloridaUniversity of South FloridaFundación La Salle de Ciencias NaturalesFundación La Salle de Ciencias NaturalesThe CARIACO Ocean Time Series program has made monthly measurements of oxygen, nutrients, and carbon system parameters (∑CO2, alkalinity, pH) in the Cariaco Basin since 1996. At the same time, sediment traps have collected settling particles at four to five depths ranging from 150 to 1,200 m. The depth of the transition from oxic to anoxic conditions has fluctuated dramatically over the time series due to changes in the occurrence of Caribbean water intrusions into the deep basin. Nutrient concentrations in the deep basin have increased steadily with time in a proportion reflective of the elemental ratios in the settling organic matter, although N:P ratios in the water column (approximately 16:1) differ from ratios in the accumulating nutrients (11:1) and the settling flux (ranging between 5:1 and 12.5:1). This difference is likely due to changes in the source material for remineralization, either because of sizeable ecosystem changes or changes in the relative importance of the terrestrial input of inorganic P or scavenging of P by mineral precipitation near the oxic/anoxic interface. Alternatively, there may have been changes in the degree of preferential remineralization of P.http://tos.org/oceanography/archive/27-1_scranton.pdfCariacotime seriesCARIACO Ocean Time Series programCaribbean waterocean nutrients |
| spellingShingle | Mary I. Scranton Gordon T. Taylor Robert Thunell Claudia R. Benitez-Nelson Frank Muller-Karger Kent Fanning Laura Lorenzoni Enrique Montes Ramon Varela Yrene Astor Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin Oceanography Cariaco time series CARIACO Ocean Time Series program Caribbean water ocean nutrients |
| title | Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin |
| title_full | Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin |
| title_fullStr | Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin |
| title_full_unstemmed | Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin |
| title_short | Interannual and Subdecadal Variability in the Nutrient Geochemistry of the Cariaco Basin |
| title_sort | interannual and subdecadal variability in the nutrient geochemistry of the cariaco basin |
| topic | Cariaco time series CARIACO Ocean Time Series program Caribbean water ocean nutrients |
| url | http://tos.org/oceanography/archive/27-1_scranton.pdf |
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