DOI: 10.1002/2015GB005349
Scopus记录号: 2-s2.0-84978371838
论文题名: Net community production at Ocean Station Papa observed with nitrate and oxygen sensors on profiling floats
作者: Plant J ; N ; , Johnson K ; S ; , Sakamoto C ; M ; , Jannasch H ; W ; , Coletti L ; J ; , Riser S ; C ; , Swift D ; D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 6 起始页码: 859
结束页码: 879
语种: 英语
英文关键词: gas exchange
; net community production
; nitrate
; oxygen
; profiling floats
; spring bloom
Scopus关键词: algal bloom
; biomass
; carbon dioxide
; floating structure
; gas exchange
; mixed layer
; mixing
; net primary production
; nitrate
; oxygen
; profiler
; sensor
; weather station
; zooplankton
; Gulf of Alaska
; Pacific Ocean
英文摘要: Six profiling floats equipped with nitrate and oxygen sensors were deployed at Ocean Station P in the Gulf of Alaska. The resulting six calendar years and 10 float years of nitrate and oxygen data were used to determine an average annual cycle for net community production (NCP) in the top 35 m of the water column. NCP became positive in February as soon as the mixing activity in the surface layer began to weaken, but nearly 3 months before the traditionally defined mixed layer began to shoal from its winter time maximum. NCP displayed two maxima, one toward the end of May and another in August with a summertime minimum in June corresponding to the historical peak in mesozooplankton biomass. The average annual NCP was determined to be 1.5 ± 0.6 mol C m−2 yr−1 using nitrate and 1.5 ± 0.7 mol C m−2 yr−1 using oxygen. The results from oxygen data proved to be quite sensitive to the gas exchange model used as well as the accuracy of the oxygen measurement. Gas exchange models optimized for carbon dioxide flux generally ignore transport due to gas exchange through the injection of bubbles, and these models yield NCP values that are two to three time higher than the nitrate-based estimates. If nitrate and oxygen NCP rates are assumed to be related by the Redfield model, we show that the oxygen gas exchange model can be optimized by tuning the exchange terms to reproduce the nitrate NCP annual cycle. ©2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77848
Appears in Collections: 气候变化事实与影响
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作者单位: Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States; School of Oceanography, University of Washington, Seattle, WA, United States
Recommended Citation:
Plant J,N,, Johnson K,et al. Net community production at Ocean Station Papa observed with nitrate and oxygen sensors on profiling floats[J]. Global Biogeochemical Cycles,2016-01-01,30(6)