DOI: 10.1002/2017JC013408
Scopus记录号: 2-s2.0-85041374395
论文题名: Correlation Lengths for Estimating the Large-Scale Carbon and Heat Content of the Southern Ocean
作者: Mazloff M.R. ; Cornuelle B.D. ; Gille S.T. ; Verdy A.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 883
结束页码: 901
语种: 英语
英文关键词: carbon
; heat
; Southern Ocean
; spatial correlation lengths
Scopus关键词: air-sea interaction
; biogeochemistry
; carbon cycle
; climate variation
; dissolved inorganic carbon
; estimation method
; heat budget
; numerical method
; sea surface height
; sea surface temperature
; seasonal variation
; spatial analysis
; Southern Ocean
英文摘要: The spatial correlation scales of oceanic dissolved inorganic carbon, heat content, and carbon and heat exchanges with the atmosphere are estimated from a realistic numerical simulation of the Southern Ocean. Biases in the model are assessed by comparing the simulated sea surface height and temperature scales to those derived from optimally interpolated satellite measurements. While these products do not resolve all ocean scales, they are representative of the climate scale variability we aim to estimate. Results show that constraining the carbon and heat inventory between 35°S and 70°S on time-scales longer than 90 days requires approximately 100 optimally spaced measurement platforms: approximately one platform every 20° longitude by 6° latitude. Carbon flux has slightly longer zonal scales, and requires a coverage of approximately 30° by 6°. Heat flux has much longer scales, and thus a platform distribution of approximately 90° by 10° would be sufficient. Fluxes, however, have significant subseasonal variability. For all fields, and especially fluxes, sustained measurements in time are required to prevent aliasing of the eddy signals into the longer climate scale signals. Our results imply a minimum of 100 biogeochemical-Argo floats are required to monitor the Southern Ocean carbon and heat content and air-sea exchanges on time-scales longer than 90 days. However, an estimate of formal mapping error using the current Argo array implies that in practice even an array of 600 floats (a nominal float density of about 1 every 7° longitude by 3° latitude) will result in nonnegligible uncertainty in estimating climate signals. © 2018. 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/114531
Appears in Collections: 气候减缓与适应
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作者单位: Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States
Recommended Citation:
Mazloff M.R.,Cornuelle B.D.,Gille S.T.,et al. Correlation Lengths for Estimating the Large-Scale Carbon and Heat Content of the Southern Ocean[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)