DOI: 10.1002/gbc.20058
Scopus记录号: 2-s2.0-84881150395
论文题名: The influence of net community production and phytoplankton community structure on CO2 uptake in the Gulf of Alaska
作者: Palevsky H ; I ; , Ribalet F ; , Swalwell J ; E ; , Cosca C ; E ; , Cokelet E ; D ; , Feely R ; A ; , Armbrust E ; V ; , Quay P ; D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 3 起始页码: 664
结束页码: 676
语种: 英语
英文关键词: biological pump
; carbon cycle
; Gulf of Alaska
; net community production
; phytoplankton
Scopus关键词: Biological productivity
; Biological pumps
; Carbon cycles
; Ecological dynamics
; Gulf of Alaska
; High spatial resolution
; Net community productions
; Phytoplankton community
; Carbon
; Ecology
; Phytoplankton
; Carbon dioxide
; air-sea interaction
; biological pump
; biological uptake
; carbon dioxide
; carbon flux
; chlorophyll
; coastal water
; community structure
; gyre
; measurement method
; net primary production
; phytoplankton
; spatial resolution
; Gulf of Alaska
; Pacific Ocean
; algae
; Vindula arsinoe
英文摘要: Biological productivity is a key factor controlling the ocean's ability to take up carbon dioxide from the atmosphere. However, the ecological dynamics that drive regions of intense productivity and carbon export are poorly understood. In this study, we present high-spatial-resolution estimates of air-sea CO2 flux, net community production (NCP) rates calculated from O2/Ar ratios, and phytoplankton population abundances determined by continuous underway measurements on a cruise across the Gulf of Alaska in May 2010. The highest rates of NCP (249 ± 40 mmol C m-2 d -1) and oceanic CO2 uptake (air-sea flux of -42.3 ± 6.1 mmol C m-2 d-1) were observed across a transition zone between the high-nitrate low-chlorophyll (HNLC) waters of the Alaskan Gyre and the coastal waters off the Aleutian Islands. While the transition zone comprises 20% of the total area covered in crossing the Gulf of Alaska, it contributed 58% of the total NCP and 67% of the total CO2 uptake observed along the cruise track. A corresponding transition zone phytoplankton bloom was dominated by two small-celled (<20 μm) phytoplankton communities, which were distinct from the phytoplankton communities in the surrounding Alaskan Gyre and coastal waters. We hypothesize that mixing between iron-rich coastal waters and iron-limited Alaskan Gyre waters stimulated this bloom and fueled the high NCP and CO2 export observed in the region. ©2013. 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/77599
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, Box 355351, Seattle, WA 98195, United States; Pacific Marine Environmental Laboratory, NOAA, Seattle, WA, United States
Recommended Citation:
Palevsky H,I,, Ribalet F,et al. The influence of net community production and phytoplankton community structure on CO2 uptake in the Gulf of Alaska[J]. Global Biogeochemical Cycles,2013-01-01,27(3)