The Role of Vertically and Obliquely Propagating Gravity Waves in Influencing the Polar Summer Mesosphere.

ABSTRACT: Using an 8-year (2007-2014) data set from two different limb-viewing instruments, we evaluate the relative roles of vertically versus obliquely propagating gravity waves (GWs) as sources of GWs in the polar summer mesosphere. Obliquely propagating waves are of interest because they are presumed to be generated by the summer monsoons. In the high-latitude upper mesosphere, the correlation coefficient between the time series of ice water content (IWC) and GW amplitude is 0.48, indicating that the observed GWs enhance polar mesospheric clouds (PMCs). For vertically propagating waves, the correlation coefficient between IWC and stratospheric/lower mesospheric (20-70 km) GW amplitude at the same high latitudes becomes more negative with increasing altitude. This change in correlation from negat

SUBMITTER: Thurairajah B 

PROVIDER: S-EPMC8243719 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature