DOI: 10.1002/2015GB005318
Scopus记录号: 2-s2.0-84959431956
论文题名: The annual cycle of gross primary production, net community production, and export efficiency across the North Pacific Ocean
作者: Palevsky H ; I ; , Quay P ; D ; , Lockwood D ; E ; , Nicholson D ; P
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 2 起始页码: 361
结束页码: 380
语种: 英语
英文关键词: biological pump
; carbon cycle
; gross oxygen production
; net community production
; North Pacific
; productivity
Scopus关键词: annual cycle
; argon
; biological pump
; carbon sequestration
; deep water ventilation
; dissolved gas
; efficiency measurement
; mixed layer
; oxygen isotope
; primary production
; spatiotemporal analysis
; tracer
; Kuroshio Current
; Pacific Ocean
; Pacific Ocean (North)
; Pacific Ocean (Northwest)
英文摘要: We measured triple oxygen isotopes and oxygen/argon dissolved gas ratios as nonincubation-based geochemical tracers of gross oxygen production (GOP) and net community production (NCP) on 16 container ship transects across the North Pacific from 2008 to 2012. We estimate rates and efficiency of biological carbon export throughout the full annual cycle across the North Pacific basin (35°N-50°N, 142°E-125°W) by constructing mixed layer budgets that account for physical and biological influences on these tracers. During the productive season from spring to fall, GOP and NCP are highest in the Kuroshio region west of 170°E and decrease eastward across the basin. However, deep winter mixed layers (>200m) west of 160°W ventilate ~40-90% of this seasonally exported carbon, while only ~10% of seasonally exported carbon east of 160°W is ventilated in winter where mixed layers are <120m. As a result, despite higher annual GOP in the west than the east, the annual carbon export (sequestration) rate and efficiency decrease westward across the basin from export of 2.3±0.3molCm-2yr-1 east of 160°W to 0.5±0.7molCm-2yr-1 west of 170°E. Existing productivity rate estimates from time series stations are consistent with our regional productivity rate estimates in the eastern but not western North Pacific. These results highlight the need to estimate productivity rates over broad spatial areas and throughout the full annual cycle including during winter ventilation in order to accurately estimate the rate and efficiency of carbon sequestration via the ocean's biological pump. ©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/77879
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; Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Recommended Citation:
Palevsky H,I,, Quay P,et al. The annual cycle of gross primary production, net community production, and export efficiency across the North Pacific Ocean[J]. Global Biogeochemical Cycles,2016-01-01,30(2)