Net community production in the northeastern Chukchi Sea
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| Title: | Net community production in the northeastern Chukchi Sea |
|---|---|
| Authors: | Mathis, Jeremy T.1 jmathis@sfos.uaf.edu, Bates, Nicholas R.2, Hansell, Dennis A.3, Babila, Tali3 |
| Source: | Deep-Sea Research Part II, Topical Studies in Oceanography. Aug2009, Vol. 56 Issue 17, p1213-1222. 10p. |
| Subjects: | Marine productivity, Composition of water, Nitrogen in water, Dissolved organic matter, Carbon, Hydrography, Continental shelf, Phytoplankton |
| Geographic Terms: | Canada Basin, Chukchi Sea |
| Abstract: | Abstract: To assess the magnitude, distribution and fate of net community production (NCP) in the Chukchi Sea, dissolved inorganic carbon (DIC), dissolved organic carbon (DOC) and dissolved organic nitrogen (DON), and particulate organic carbon (POC) and particulate organic nitrogen (PON) were measured during the spring and summer of 2004 and compared to similar observations taken in 2002. Distinctive differences in hydrographic conditions were observed between these two years, allowing us to consider several factors that could impact NCP and carbon cycling in both the Chukchi Shelf and the adjacent Canada Basin. Between the spring and summer cruises high rates of phytoplankton production over the Chukchi shelf resulted in a significant drawdown of DIC in the mixed layer and the associated production of DOC/N and POC/N. As in 2002, the highest rates of NCP occurred over the northeastern part of the Chukchi shelf near the head of Barrow Canyon, which has historically been a hotspot for biological activity in the region. However, in 2004, rates of NCP over most of the northeastern shelf were similar and in some cases higher than rates observed in 2002. This was unexpected due to a greater influence of low-nutrient waters from the Alaskan Coastal Current in 2004, which should have suppressed rates of NCP compared to 2002. Between spring and summer of 2004, normalized concentrations of DIC in the mixed layer decreased by as much as 280μmolkg−1, while DOC and DON increased by ∼16 and 9μmolkg−1, respectively. Given the decreased availability of inorganic nutrients in 2004, rates of NCP could be attributed to increased light penetration, which may have allowed phytoplankton to increase utilization of nutrients deeper in the water column. In addition, there was a rapid and extensive retreat of the ice cover in summer 2004 with warmer temperatures in the mixed layer that could have enhanced NCP. Estimates of NCP near the head of Barrow Canyon in 2004 were ∼1500mgcarbon(C)m−2 d−1 which was ∼400mgCm−2 d−1 higher than the same location in 2002. Estimates of NCP over the shelf-break and deep Canada Basin were low in both years, confirming that there is little primary production in the interior of the western Arctic Ocean due to near-zero concentrations of inorganic nitrate in the mixed layer. [Copyright &y& Elsevier] |
| Copyright of Deep-Sea Research Part II, Topical Studies in Oceanography is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 42103942 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Net community production in the northeastern Chukchi Sea – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mathis%2C+Jeremy+T%2E%22">Mathis, Jeremy T.</searchLink><relatesTo>1</relatesTo><i> jmathis@sfos.uaf.edu</i><br /><searchLink fieldCode="AR" term="%22Bates%2C+Nicholas+R%2E%22">Bates, Nicholas R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hansell%2C+Dennis+A%2E%22">Hansell, Dennis A.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Babila%2C+Tali%22">Babila, Tali</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Deep-Sea+Research+Part+II%2C+Topical+Studies+in+Oceanography%22">Deep-Sea Research Part II, Topical Studies in Oceanography</searchLink>. Aug2009, Vol. 56 Issue 17, p1213-1222. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Marine+productivity%22">Marine productivity</searchLink><br /><searchLink fieldCode="DE" term="%22Composition+of+water%22">Composition of water</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+in+water%22">Nitrogen in water</searchLink><br /><searchLink fieldCode="DE" term="%22Dissolved+organic+matter%22">Dissolved organic matter</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon%22">Carbon</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrography%22">Hydrography</searchLink><br /><searchLink fieldCode="DE" term="%22Continental+shelf%22">Continental shelf</searchLink><br /><searchLink fieldCode="DE" term="%22Phytoplankton%22">Phytoplankton</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Canada+Basin%22">Canada Basin</searchLink><br /><searchLink fieldCode="DE" term="%22Chukchi+Sea%22">Chukchi Sea</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: To assess the magnitude, distribution and fate of net community production (NCP) in the Chukchi Sea, dissolved inorganic carbon (DIC), dissolved organic carbon (DOC) and dissolved organic nitrogen (DON), and particulate organic carbon (POC) and particulate organic nitrogen (PON) were measured during the spring and summer of 2004 and compared to similar observations taken in 2002. Distinctive differences in hydrographic conditions were observed between these two years, allowing us to consider several factors that could impact NCP and carbon cycling in both the Chukchi Shelf and the adjacent Canada Basin. Between the spring and summer cruises high rates of phytoplankton production over the Chukchi shelf resulted in a significant drawdown of DIC in the mixed layer and the associated production of DOC/N and POC/N. As in 2002, the highest rates of NCP occurred over the northeastern part of the Chukchi shelf near the head of Barrow Canyon, which has historically been a hotspot for biological activity in the region. However, in 2004, rates of NCP over most of the northeastern shelf were similar and in some cases higher than rates observed in 2002. This was unexpected due to a greater influence of low-nutrient waters from the Alaskan Coastal Current in 2004, which should have suppressed rates of NCP compared to 2002. Between spring and summer of 2004, normalized concentrations of DIC in the mixed layer decreased by as much as 280μmolkg−1, while DOC and DON increased by ∼16 and 9μmolkg−1, respectively. Given the decreased availability of inorganic nutrients in 2004, rates of NCP could be attributed to increased light penetration, which may have allowed phytoplankton to increase utilization of nutrients deeper in the water column. In addition, there was a rapid and extensive retreat of the ice cover in summer 2004 with warmer temperatures in the mixed layer that could have enhanced NCP. Estimates of NCP near the head of Barrow Canyon in 2004 were ∼1500mgcarbon(C)m−2 d−1 which was ∼400mgCm−2 d−1 higher than the same location in 2002. Estimates of NCP over the shelf-break and deep Canada Basin were low in both years, confirming that there is little primary production in the interior of the western Arctic Ocean due to near-zero concentrations of inorganic nitrate in the mixed layer. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Deep-Sea Research Part II, Topical Studies in Oceanography is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.dsr2.2008.10.017 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1213 Subjects: – SubjectFull: Marine productivity Type: general – SubjectFull: Composition of water Type: general – SubjectFull: Nitrogen in water Type: general – SubjectFull: Dissolved organic matter Type: general – SubjectFull: Carbon Type: general – SubjectFull: Hydrography Type: general – SubjectFull: Continental shelf Type: general – SubjectFull: Phytoplankton Type: general – SubjectFull: Canada Basin Type: general – SubjectFull: Chukchi Sea Type: general Titles: – TitleFull: Net community production in the northeastern Chukchi Sea Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mathis, Jeremy T. – PersonEntity: Name: NameFull: Bates, Nicholas R. – PersonEntity: Name: NameFull: Hansell, Dennis A. – PersonEntity: Name: NameFull: Babila, Tali IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 09670645 Numbering: – Type: volume Value: 56 – Type: issue Value: 17 Titles: – TitleFull: Deep-Sea Research Part II, Topical Studies in Oceanography Type: main |
| ResultId | 1 |
