DOI: 10.1002/2013GB004683
Scopus记录号: 2-s2.0-84897354747
论文题名: Air-sea CO2 fluxes in the California Current: Impacts of model resolution and coastal topography
作者: Fiechter J ; , Curchitser E ; N ; , Edwards C ; A ; , Chai F ; , Goebel N ; L ; , Chavez F ; P
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 4 起始页码: 371
结束页码: 385
语种: 英语
英文关键词: air-sea CO2 flux
; California Current
; carbon budget
; coastal topography
; model resolution
; upwelling system
Scopus关键词: Budget control
; Carbon
; Carbon capture
; Carbon dioxide
; Coastal engineering
; Topography
; California Current
; Carbon budgets
; CO2 fluxes
; Coastal topography
; Model resolution
; Upwelling systems
; Computer simulation
; air-sea interaction
; boundary current
; carbon flux
; climate modeling
; coastal zone
; estimation method
; global perspective
; image resolution
; simulation
; wind field
; California Current
; Pacific Ocean
英文摘要: The present study uses a suite of coupled physical-biogeochemical model simulations at 1/3°, 1/10°, and 1/30° to assess the impact of horizontal resolution on air-sea CO2 fluxes in the California Current System (CCS), a relevant issue for downscaling between coarser resolution global climate models and higher resolution regional models. The results demonstrate that horizontal resolution is important to reproduce the sharp transition between near-shore outgassing and offshore absorption, as well as to resolve regions of enhanced near-shore outgassing in the lee of capes. The width of the outgassing region is overestimated when horizontal resolution is not eddy resolving (i.e., 1/3°) but becomes more dependent on shelf topography for eddy-resolving simulations (i.e., 1/10° and 1/30°). Enhanced near-shore outgassing is associated with a local increase in wind-driven upwelling in the lee of capes (i.e., expansion fans), meaning that sufficient horizontal resolution is needed both in the ocean circulation model and in the wind field forcing the model. From a global carbon budget perspective, the model indicates that biological production generates sufficient absorption within a few hundred kilometers of the coast to offset near-shore outgassing, which is consistent with the notion that midlatitude eastern boundary current upwelling systems act both as a sink and source for atmospheric CO2. Based on the 1/30° solution, the CCS between 35 and 45 N and out to 600 km offshore is a net carbon sink of approximately 6 TgC yr-1, with the 1/10° solution underestimating this value by less than 10% and the 1/3° solution by a factor of 3. Key Points Outgassing intensification linked to coastal topographic features Near-shore outgassing balanced by offshore absorption Carbon fluxes most sensitive to horizontal resolution for 35-40N ©2014. 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/77504
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Marine Sciences, University of California, Santa Cruz CA, United States; Institute of Marine and Coastal Sciences, State University of N. J. Rutgers, New Brunswick NJ, United States; Ocean Sciences Department, University of California, Santa Cruz CA, United States; School of Marine Sciences, University of Maine, Orono ME, United States; Monterey Bay Aquarium Research Institute, Moss Landing CA, United States
Recommended Citation:
Fiechter J,, Curchitser E,N,et al. Air-sea CO2 fluxes in the California Current: Impacts of model resolution and coastal topography[J]. Global Biogeochemical Cycles,2014-01-01,28(4)