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SUMMARY:An Evaluation of four global reanalysis products using in-situ obs
 ervations in the Amundsen Sea Embayment\, Antarctica - Richard Jones\, Uni
 versity of East Anglia
DTSTART:20160920T130000Z
DTEND:20160920T140000Z
UID:TALK67380@talks.cam.ac.uk
CONTACT:James Pope
DESCRIPTION:The glaciers within the Amundsen Sea Embayment (ASE)\, West An
 tarctica\, are amongst the most rapidly retreating in Antarctica. Meteorol
 ogical reanalysis products are widely used to help understand and simulate
  the processes causing this retreat. Examples of their uses in this region
  are: to force ocean and atmospheric models\, to examine long term meteoro
 logical variability in the region and as a comparison to satellite observa
 tions of surface accumulation on glaciers. While their use is commonplace\
 , very little is known about the performance of the reanalysis products in
  a region with very sparse coverage of in-situ observations. Here we provi
 de an evaluation against observations of four of the latest global reanaly
 sis products within the ASE region – the ECMWF Interim Re-analysis (ERA-
 I)\, Japanese 55-year Reanalysis (JRA-55)\, Climate Forecast System Reanal
 ysis (CFSR) and Modern Era Retrospective-Analysis for Research and Applica
 tions (MERRA). The observations comprise data from four automatic weather 
 stations (AWS)\, three research-vessel cruises and a new set of 38 radioso
 ndes all within the period 2009-2014. The focus here is on near surface te
 mperature\, humidity and wind speed\, we make use of the year-round AWS ob
 servations to evaluate the seasonal variability of temperature biases in t
 he reanalysis products. The radiosonde observations allow discussion of ho
 w the reanalysis products represent common features such as temperature in
 versions and low level jets.
LOCATION:British Antarctic Survey\, Room 330B
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