气候变化领域集成服务门户(CCPortal): Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations

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DOI	10.1029/2019GB006176
	Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations
	Bushinsky S.M.; Landschützer P.; Rödenbeck C.; Gray A.R.; Baker D.; Mazloff M.R.; Resplandy L.; Johnson K.S.; Sarmiento J.L.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	1370
结束页码	1388
卷号	33 期号:11
英文摘要	New estimates of pCO2 from profiling floats deployed by the Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) project have demonstrated the importance of wintertime outgassing south of the Polar Front, challenging the accepted magnitude of Southern Ocean carbon uptake (Gray et al., 2018, https://doi:10.1029/2018GL078013). Here, we put 3.5 years of SOCCOM observations into broader context with the global surface carbon dioxide database (Surface Ocean CO2 Atlas, SOCAT) by using the two interpolation methods currently used to assess the ocean models in the Global Carbon Budget (Le Quéré et al., 2018, https://doi:10.5194/essd-10-2141-2018) to create a ship-only, a float-weighted, and a combined estimate of Southern Ocean carbon fluxes (<35°S). In our ship-only estimate, we calculate a mean uptake of −1.14 ± 0.19 Pg C/yr for 2015–2017, consistent with prior studies. The float-weighted estimate yields a significantly lower Southern Ocean uptake of −0.35 ± 0.19 Pg C/yr. Subsampling of high-resolution ocean biogeochemical process models indicates that some of the differences between float and ship-only estimates of the Southern Ocean carbon flux can be explained by spatial and temporal sampling differences. The combined ship and float estimate minimizes the root-mean-square pCO2 difference between the mapped product and both data sets, giving a new Southern Ocean uptake of −0.75 ± 0.22 Pg C/yr, though with uncertainties that overlap the ship-only estimate. An atmospheric inversion reveals that a shift of this magnitude in the contemporary Southern Ocean carbon flux must be compensated for by ocean or land sinks within the Southern Hemisphere. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	biogeochemical profiling floats; global carbon cycle; SOCCOM; Southern Ocean
语种	英语
scopus关键词	air-sea interaction; biogeochemistry; carbon dioxide; carbon flux; climate modeling; data buoy; database; floating structure; interpolation; magnitude; sampling; Southern Ocean
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129697
作者单位	Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; Now at Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, HI, United States; Max Planck Institute for Meteorology, Hamburg, Germany; Max Planck Institute for Biogeochemistry, Jena, Germany; School of Oceanography, University of Washington, Seattle, WA, United States; Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, CO, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Geosciences and Princeton Environmental Institute, Princeton University, Princeton, NJ, United States; Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States
推荐引用方式 GB/T 7714	Bushinsky S.M.,Landschützer P.,Rödenbeck C.,et al. Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations[J],2019,33(11).
APA	Bushinsky S.M..,Landschützer P..,Rödenbeck C..,Gray A.R..,Baker D..,...&Sarmiento J.L..(2019).Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations.Global Biogeochemical Cycles,33(11).
MLA	Bushinsky S.M.,et al."Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations".Global Biogeochemical Cycles 33.11(2019).