Valdivieso M., Haines K., Balmaseda M., Chang Y. S., Drevillon M., Ferry N., Fujii Y., Kohl A., Storto A., Toyoda T., Wang X. C., Waters J., Xue Y., Yin Y. H., Barnier B., Hernandez Fabrice, Kumar A., Lee T., Masina S., Peterson K. A. (2017). An assessment of air-sea heat fluxes from ocean and coupled reanalyses. In :
Ocean estimation from an ensemble of global ocean reanalyses, consisting of papers from the Ocean Reanalyses Intercomparison Project (ORAIP). Climate Dynamics, 49 (3 (No spécial)), p. 983-1008. ISSN 0930-7575.
Titre du document
An assessment of air-sea heat fluxes from ocean and coupled reanalyses
Année de publication
2017
Auteurs
Valdivieso M., Haines K., Balmaseda M., Chang Y. S., Drevillon M., Ferry N., Fujii Y., Kohl A., Storto A., Toyoda T., Wang X. C., Waters J., Xue Y., Yin Y. H., Barnier B., Hernandez Fabrice, Kumar A., Lee T., Masina S., Peterson K. A.
In
Ocean estimation from an ensemble of global ocean reanalyses, consisting of papers from the Ocean Reanalyses Intercomparison Project (ORAIP)
Source
Climate Dynamics, 2017,
49 (3 (No spécial)), p. 983-1008 ISSN 0930-7575
Sixteen monthly air-sea heat flux products from global ocean/coupled reanalyses are compared over 19932009 as part of the Ocean Reanalysis Intercomparison Project (ORA-IP). Objectives include assessing the global heat closure, the consistency of temporal variability, comparison with other flux products, and documenting errors against in situ flux measurements at a number of OceanSITES moorings. The ensemble of 16 ORA-IP flux estimates has a global positive bias over 1993-2009 of 4.2 +/- 1.1 W m(-2). Residual heat gain (i. e., surface flux + assimilation increments) is reduced to a small positive imbalance (typically, + 1-2 W m(-2)). This compensation between surface fluxes and assimilation increments is concentrated in the upper 100 m. Implied steady meridional heat transports also improve by including assimilation sources, except near the equator. The ensemble spread in surface heat fluxes is dominated by turbulent fluxes (>40 W m(-2) over the western boundary currents). The mean seasonal cycle is highly consistent, with variability between products mostly <10 W m-2. The interannual variability has consistent signal-to-noise ratio (similar to 2) throughout the equatorial Pacific, reflecting ENSO variability. Comparisons at tropical buoy sites (10 degrees S-15 degrees N) over 2007-2009 showed too little ocean heat gain (i. e., flux into the ocean) in ORA-IP (up to 1/3 smaller than buoy measurements) primarily due to latent heat flux errors in ORA-IP. Comparisons with the Stratus buoy (20 degrees S, 85 degrees W) over a longer period, 2001-2009, also show the ORA-IP ensemble has 16 W m(-2) smaller net heat gain, nearly all of which is due to too much latent cooling caused by differences in surface winds imposed in ORA-IP.
Plan de classement
Limnologie physique / Océanographie physique [032]
Description Géographique
MONDE
Localisation
Fonds IRD [F B010070873]
Identifiant IRD
fdi:010070873
