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000887975 1001_ $$00000-0003-4377-2038$$aHindley, N. P.$$b0$$eCorresponding author
000887975 245__ $$aAn 18‐year climatology of directional stratospheric gravity wave momentum flux from 3‐D satellite observations
000887975 260__ $$aHoboken, NJ$$bWiley$$c2020
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000887975 520__ $$aAtmospheric gravity waves (GWs) are key drivers of the atmospheric circulation, but their representation in general circulation models (GCMs) is challenging, leading to significant biases in middle atmospheric circulations. Unresolved GW momentum transport in GCMs must be parameterized, but global directional GW observations are needed to constrain this. Here we present an 18‐year climatology of directional stratospheric GW momentum flux (GWMF) from global AIRS/Aqua 3‐D satellite observations during 2002 to 2019. Striking hemispheric asymmetries are found at high latitudes, including dramatic reductions and reversals of GWMF during sudden stratospheric warmings. During Southern Hemisphere winter, a lateral convergence of GWMF toward 60°S is found that has no Northern Hemisphere counterpart. In the tropics, we find that zonal GWMF in AIRS measurements is strongly modulated by the semiannual oscillation (SAO) but not the quasi‐biennial oscillation (QBO). Our results provide guidance for future GW parameterizations needed to resolve long‐standing biases in GCMs.
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000887975 7001_ $$00000-0003-2496-953X$$aWright, C. J.$$b1
000887975 7001_ $$0P:(DE-Juel1)129125$$aHoffmann, L.$$b2
000887975 7001_ $$00000-0002-9670-6715$$aMoffat‐Griffin, T.$$b3
000887975 7001_ $$00000-0003-1149-8484$$aMitchell, N. J.$$b4
000887975 773__ $$0PERI:(DE-600)2021599-X$$a10.1029/2020GL089557$$n22$$pe2020GL089557$$tGeophysical research letters$$v47$$x1944-8007$$y2020
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