DOI: 10.1002/2016GB005380
Scopus记录号: 2-s2.0-84978419101
论文题名: Profiling float-based observations of net respiration beneath the mixed layer
作者: Hennon T ; D ; , Riser S ; C ; , Mecking S
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 6 起始页码: 920
结束页码: 932
语种: 英语
英文关键词: carbon export
; profiling floats
; respiration
Scopus关键词: community structure
; concentration (composition)
; dissolved oxygen
; integrated approach
; mixed layer
; net primary production
; organic carbon
; oxygen
; phytoplankton
; respiration
; seasonal variation
; seasonality
; steady-state equilibrium
; Atlantic Ocean
; Hawaii [United States]
; Sargasso Sea
; United States
英文摘要: We employ profiling floats with dissolved oxygen sensors to observe in situ temporal oxygen evolution below the mixed layer, allowing us to characterize net respiration of organic carbon in eight distinct regions over the globe. Export and export efficiency are generally high in locations with strong seasonal variability and low in locations of weak seasonality. Vertically integrated respiration is weakly, yet significantly, correlated with remote observations of chlorophyll, net primary production, and planktonic community size structure. These correlations suggest that regimes of high net primary production and large phytoplankton fuel elevated respiration at depth. Several regions of float-based observations intersect with sites of other detailed observations (e.g., Hawaii and Sargasso Sea), which allows us to compare our results to independent studies. We find that there is good agreement among export production estimates at highly seasonal locations, and that float-based observations may be biased low at weakly seasonal locations. We posit that the reason for the low-latitude discrepancy is the relative steady state of oxygen concentration caused by weak seasonality and shallow wintertime mixed layer depths. ©2016. 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/77844
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; Applied Physics Laboratory, University of Washington, Seattle, WA, United States
Recommended Citation:
Hennon T,D,, Riser S,et al. Profiling float-based observations of net respiration beneath the mixed layer[J]. Global Biogeochemical Cycles,2016-01-01,30(6)