Constraints on oceanic meridional heat transport from combined measurements of oxygen and carbon

TitleConstraints on oceanic meridional heat transport from combined measurements of oxygen and carbon
Publication TypeJournal Article
Year of Publication2016
AuthorsResplandy L., Keeling RF, Stephens B.B, Bent J.D, Jacobson A., Rodenbeck C, Khatiwala S
JournalClimate Dynamics
Volume47
Pagination3335-3357
Date Published2016/11
Type of ArticleArticle
ISBN Number0930-7575
Accession NumberWOS:000386062000037
Keywordsair-sea flux; aircraft campaign; atmospheric oxygen; bulk data; deep; Hemispheric asymmetry; HIPPO; intertropical convergence zone; mixed-layer; model; north-atlantic; Ocean heat transport; overturning circulation; Potential oxygen; variability
Abstract

Despite its importance to the climate system, the ocean meridional heat transport is still poorly quantified. We identify a strong link between the northern hemisphere deficit in atmospheric potential oxygen (APO = O + 1.1 CO) and the asymmetry in meridional heat transport between northern and southern hemispheres. The recent aircraft observations from the HIPPO campaign reveal a northern APO deficit in the tropospheric column of 10.4 1.0 per meg, double the value at the surface and more representative of large-scale air-sea fluxes. The global northward ocean heat transport asymmetry necessary to explain the observed APO deficit is about 0.7-1.1 PW, which corresponds to the upper range of estimates from hydrographic sections and atmospheric reanalyses.

DOI10.1007/s00382-016-3029-3
Short TitleClim. Dyn.
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