| DOI: | 10.1029/2018GB006152
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| 论文题名: | Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean |
| 作者: | Bif M.B.; Hansell D.A.
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| 刊名: | Global Biogeochemical Cycles
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| ISSN: | 0886-6236
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| EISSN: | 1944-9224
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| 出版年: | 2019
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| 卷: | 33, 期:5 | | 语种: | 英语
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| 英文关键词: | annual variation
; biogeochemistry
; biological production
; carbon sink
; dissolved organic carbon
; dissolved organic matter
; marine environment
; nitrate
; observatory
; seasonal variation
; seasonality
; Gulf of Alaska
; Pacific Ocean
; Pacific Ocean (Northeast)
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| 学科: | dissolved organic matter (DOM)
; DOC
; Line P
; marine biogeochemistry
; net community production
; Ocean Station Papa
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| 中文摘要: | From seasonal cruises in the NE Pacific Ocean during 2017, we (1) determined dissolved organic carbon concentrations; (2) calculated net community production (NCP) from nitrate drawdown; and (3) established relationships between NCP and seasonal dissolved organic carbon (DOC) accumulation in the upper 75 m. The fraction of NCP that accumulated as DOC, hereafter referred to as the net dissolved production ratio, was calculated for several stations during spring and summer. The net dissolved production ratio was about 0.26 at the oceanic station Ocean Station Papa during different seasons and years. Using nitrate concentration profiles obtained from Bio-Argo floats during 2009–2018 operating near Ocean Station Papa, we calculated NCP at high temporal resolution and then applied the 0.26 constant in order to (4) estimate DOC variability for the 9-year period. We found strong seasonality near Ocean Station Papa, with NCP maxima during summers ranging from 0.3 to 2.9 mol C/m2 and surface DOC concentrations estimated from 56 μmol/kg in winters to 73 μmol/kg in summers. There was a 10-fold interannual variability in the seasonally accumulated inventory of DOC, ranging from 0.078 to 0.75 mol C/m2. This study reinforces the value of deploying floats equipped with chemical sensors in order to better understand marine biogeochemical cycles, especially when high resolution data cannot be obtained otherwise. Given that ~26% of NCP accumulates as DOC in the central Gulf of Alaska, the remaining balance of ~74% is available for export as sinking biogenic particles. ©2019. American Geophysical Union. All Rights Reserved. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/160132
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| Appears in Collections: | 气候变化与战略
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作者单位: | Department of Ocean Sciences, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL, United States
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| Recommended Citation: | |
Bif M.B.,Hansell D.A.. Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean[J]. Global Biogeochemical Cycles,2019-01-01,33(5)
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