C. Long
Stratospheric Temperature Trends in Reanalyses
Several review papers and assessment reports over the past
decade have highlighted uncertainties in our understanding of
stratospheric temperature trends, particularly in the middle and upper
stratosphere, based on observations and as simulated by climate and
chemistry-climate models. As reanalyses covering the stratosphere are
advancing, their depictions of stratospheric temperature changes must be
evaluated. Preliminary analyses suggest both striking differences among
reanalysis products as well as some improvement over time in addressing
some of the more salient problems (including unrealistic temperature
changes associated with improper assimilations and with changes in
observational data sources). This poster serves as a contribution of both
the emerging S-RIP activity and the long-standing SPARC Stratospheric
Temperature Trends Assessment Panel. A collaboration is sought after
to examine stratospheric temperature changes in reanalyses, to identify
and explain current problems, and to suggest ways to improve the
depiction of temperature trends in future stratospheric reanalyses. This
poster will present some results to date and serve as a starting point
for collaboration between the S-RIP and the Temperature Trends groups.
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