Hello everyone, at AWI we were having yet another look at the SST biases of the coupled climate simulations made with OpenIFS 43r3 - FESOM2, but also at ECE3(IFS36r4 - NEMO3.6), and the ECMWF IFS43r1 - NEMO3.6 HighresMIP contribution. All of these models show the well known warm biases over the SO among other places. First we calculated the Spearman's rank correlation coefficient of the SST bias and the magnitude of the wind stress, which turned out to be significant and positive, motivating further digging.
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does not include the wind intensity PWND, only . Only the cosine of the incidence angle PMU0 is considered. Was the formula added in 1996 moved to somewhere elseelsewhere in the code? If so, where too? Or has it been dropped entirely? That would be bad news I guess, not only because the effect would be missing, but also because including it again would make things even worse in terms of radiations biases.
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We also found a second body of literature that is concerned with breaking waves rather than non-breaking ones. These waves produce whitecaps that increase the direct and diffuse albedo in regions where storm systems move through frequently [3]. We where are thinking of about adopting such a scheme, assuming it is not yet part of OpenIFS.
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