DOI: 10.1175/JCLI-D-12-00571.1
Scopus记录号: 2-s2.0-84892472513
论文题名: Drake passage oceanic pCO2: Evaluating CMIP5 coupled carbon-climate models using in situ observations
作者: Jiang C. ; Gille S.T. ; Sprintall J. ; Sweeney C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 1 起始页码: 76
结束页码: 100
语种: 英语
Scopus关键词: Air sea interactions
; Carbon cycles
; Model evaluation/performance
; Ocean circulation
; Southern ocean
; Carbon
; Carbon dioxide
; Climate models
; Surface waters
; Oceanography
; air-sea interaction
; carbon cycle
; climate modeling
; dissolved inorganic carbon
; oceanic circulation
; sea surface temperature
; Drake Passage
; Southern Ocean
英文摘要: Surface water partial pressure of CO2 (pCO2) variations in Drake Passage are examined using decade-long underway shipboard measurements. North of the Polar Front (PF), the observed pCO2 shows a seasonal cycle that peaks annually in August and dissolved inorganic carbon (DIC)-forced variations are significant. Just south of the PF, pCO2 shows a small seasonal cycle that peaks annually in February, reflecting the opposing effects of changes in SST and DIC in the surface waters. At the PF, the wintertime pCO2 is nearly in equilibrium with the atmosphere, leading to a small sea-to-air CO2 flux. These observations are used to evaluate eight available Coupled Model Intercomparison Project, phase 5 (CMIP5), Earth system models (ESMs). Six ESMs reproduce the observed annual-mean pCO2 values averaged over the Drake Passage region. However, the model amplitude of the pCO2 seasonal cycle exceeds the observed amplitude of the pCO2 seasonal cycle because of the model biases in SST and surface DIC. North of the PF, deep winter mixed layers play a larger role in pCO2 variations in the models than they do in observations. Four ESMs show elevated wintertime pCO2 near the PF, causing a significant sea-to-air CO2 flux. Wintertime winds in these models are generally stronger than the satellite-derived winds. This not only magnifies the sea-to-air CO2 flux but also upwells DIC-rich water to the surface and drives strong equatorward Ekman currents. These strong model currents likely advect the upwelled DIC farther equatorward, as strong stratification in the models precludes subduction below the mixed layer. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51330
Appears in Collections: 气候变化事实与影响
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作者单位: Earth and Space Research, Seattle, WA, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; CIRES, NOAA/ESRL/GMD, Boulder, CO, United States
Recommended Citation:
Jiang C.,Gille S.T.,Sprintall J.,et al. Drake passage oceanic pCO2: Evaluating CMIP5 coupled carbon-climate models using in situ observations[J]. Journal of Climate,2014-01-01,27(1)