气候变化领域集成服务门户(CCPortal): Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean

CCPortal

DOI	10.1029/2018GB006152
	Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean
	Bif M.B.; Hansell D.A.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	526
结束页码	539
卷号	33 期号:5
英文摘要	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.
英文关键词	dissolved organic matter (DOM); DOC; Line P; marine biogeochemistry; net community production; Ocean Station Papa
语种	英语
scopus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)
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129732
作者单位	Department of Ocean Sciences, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL, United States
推荐引用方式 GB/T 7714	Bif M.B.,Hansell D.A.. Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean[J],2019,33(5).
APA	Bif M.B.,&Hansell D.A..(2019).Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean.Global Biogeochemical Cycles,33(5).
MLA	Bif M.B.,et al."Seasonality of Dissolved Organic Carbon in the Upper Northeast Pacific Ocean".Global Biogeochemical Cycles 33.5(2019).