DOI: 10.1002/2016GB005414
Scopus记录号: 2-s2.0-84981303074
论文题名: Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance
作者: Balch W ; M ; , Bates N ; R ; , Lam P ; J ; , Twining B ; S ; , Rosengard S ; Z ; , Bowler B ; C ; , Drapeau D ; T ; , Garley R ; , Lubelczyk L ; C ; , Mitchell C ; , Rauschenberg S
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 8 起始页码: 1124
结束页码: 1144
语种: 英语
英文关键词: carbonate chemistry
; coccolithophores
; Southern Ocean
; Subantarctic Front
; Subtropical Front
; trace metals
Scopus关键词: calcium carbonate
; carbon flux
; coccolith
; environmental factor
; gas exchange
; global ocean
; inorganic carbon
; partial pressure
; particulate organic carbon
; phytoplankton
; subantarctic region
; subtropical region
; surface reflectance
; trace metal
; Atlantic Sector
; Indian Sector
; Southern Ocean
; Haptophyceae
英文摘要: The Great Calcite Belt (GCB) is a region of elevated surface reflectance in the Southern Ocean (SO) covering ~16% of the global ocean and is thought to result from elevated, seasonal concentrations of coccolithophores. Here we describe field observations and experiments from two cruises that crossed the GCB in the Atlantic and Indian sectors of the SO. We confirm the presence of coccolithophores, their coccoliths, and associated optical scattering, located primarily in the region of the subtropical, Agulhas, and Subantarctic frontal regions. Coccolithophore-rich regions were typically associated with high-velocity frontal regions with higher seawater partial pressures of CO2 (pCO2) than the atmosphere, sufficient to reverse the direction of gas exchange to a CO2 source. There was no calcium carbonate (CaCO3) enhancement of particulate organic carbon (POC) export, but there were increased POC transfer efficiencies in high-flux particulate inorganic carbon regions. Contemporaneous observations are synthesized with results of trace-metal incubation experiments, 234Th-based flux estimates, and remotely sensed observations to generate a mandala that summarizes our understanding about the factors that regulate the location of the GCB. ©2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77826
Appears in Collections: 气候变化事实与影响
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作者单位: Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States; Bermuda Institute of Ocean Sciences (BIOS), Inc., St. George, Bermuda; Department of Ocean and Earth Sciences, University of Southampton, Southampton, United Kingdom; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Now at Department of Ocean Sciences, University of California, Santa Cruz, CA, United States; Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Balch W,M,, Bates N,et al. Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance[J]. Global Biogeochemical Cycles,2016-01-01,30(8)