14th June 2008 - nice example of southern hemisphere dry descending zone 1st December 2005 - error in 6.3 micron SEVIRI BT (affects GERB?) - actually this is due to missing data in SEVIRI field of view that is interpolate d in SINERGEE software! July 4 2010 - dust event over north Africa July-August 2010 Model updates: 15 July 2010 - PC2 cloud scheme, changes to BL, desert dust clim Main changes visible: - Much more extensive Sc, lower albedo where Sc actually present. Positive OLR bias suggests cloud to thin. Look at LWP? - OLR better for deep cloud: more cirrus outflow - Dust OLR bias removed to some extent. Overdoes this at midday over Algeria when not much dust around. > I notice that the low cloud has become much more extensive and less > bright. For example compare: > http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201008091200_argV006SEV2.gif > http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201008091200_dif f_argV006SEV2.gif > with: > http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201007121200_argV006SEV2.gif > http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201007121200_diff_argV006SEV2.gif > There also looks to be a positive model OLR bias over the actual > Angolan stratocumulus region suggesting the cloud top is too low, > consistent with being too optically thin. 18 August 2010 - GERB goes into eclipse season. 03 and 06 UTC comparisons available only. Looks like OLR at midnight is affected by stray light or something (model OLR > GERB): http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201008180000_diff_argV006SEV2.gif http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201008140000_diff_argV006SEV2.gif http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201008100000_diff_argV006SEV2.gif 10-16 September 2010 - Hurricanes Igor and Julia in Atlantic 30 October 2010 - GERB out of eclipse season. Interesting linear cirrus outflow over north Africa http://www.nerc-essc.ac.uk/~rpa/GERB/gifs/SIN_201010301200_argV006SEV2.gif