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

Citation:
Resplandy, L, Keeling RF, Stephens BB, Bent JD, Jacobson A, Rodenbeck C, Khatiwala S.  2016.  Constraints on oceanic meridional heat transport from combined measurements of oxygen and carbon. Climate Dynamics. 47:3335-3357.

Date Published:

2016/11

Keywords:

air-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.

Notes:

n/a

Website

DOI:

10.1007/s00382-016-3029-3