DOI: 10.1002/2015GB005251
Scopus记录号: 2-s2.0-84955349828
论文题名: Marine biological production from in situ oxygen measurements on a profiling float in the subarctic Pacific Ocean
作者: Bushinsky S ; M ; , Emerson S
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 12 起始页码: 2050
结束页码: 2060
语种: 英语
英文关键词: in situ measurements
; ocean carbon cycle
; oxygen mass balance
Scopus关键词: biological production
; carbon cycle
; circulation modeling
; climate feedback
; in situ measurement
; marine ecosystem
; mass balance
; organic carbon
; oxygen
; remote sensing
; respiration
; satellite imagery
; sensor
; upper ocean
; Pacific Ocean
; Pacific Ocean (Subarctic)
英文摘要: Evaluating the organic carbon flux from the surface ocean to the interior (the marine biological pump) is essential for predictions of ocean carbon cycle feedback to climate change. One approach for determining these fluxes is to measure the concentration of oxygen in the upper ocean over a seasonal cycle, calculate the net O2 flux using an upper ocean model, and then use a stoichiometric relationship between oxygen evolved and organic carbon produced. Applying this tracer in a variety of ocean areas over seasonal cycles requires accurate O2 measurements on autonomous vehicles. Here we demonstrate this approach using an O2 sensor on a profiling float that is periodically calibrated against atmospheric pO2. Using accurate data and a model that includes all physical and biological processes influencing oxygen, we determine an annual net community production of 0.7±0.5molCm-2yr-1 in the northeast Pacific Ocean (50°N, 145°W) from June 2012 to June 2013. There is a strong seasonal cycle in net biological oxygen production with wintertime fluxes caused by bubble processes critical to determining the annual flux. Approximately 50% of net autotrophic production during summer months is consumed by net respiration during the winter. The result is a biological pump in the subarctic Pacific Ocean that is less than that determined by similar methods in the subtropics to the south. This estimate is significantly lower than that predicted by satellite remote sensing and global circulation models. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77898
Appears in Collections: 气候变化事实与影响
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作者单位: School of Oceanography, University of Washington, Seattle, WA, United States
Recommended Citation:
Bushinsky S,M,, Emerson S. Marine biological production from in situ oxygen measurements on a profiling float in the subarctic Pacific Ocean[J]. Global Biogeochemical Cycles,2015-01-01,29(12)