Physics
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3203804h&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 3, CiteID L03804
Physics
20
Geodesy And Gravity: Instruments And Techniques, Atmospheric Processes: Global Climate Models (1626, 4928), Atmospheric Processes: Remote Sensing, Atmospheric Processes: Stratosphere/Troposphere Interactions
Scientific paper
Refractivity profiles from CHAMP GPS radio occultation measurements have been assimilated into the Met Office numerical weather prediction (NWP) system. A forecast impact experiment was run using 16 days of CHAMP data from May/June 2001, in addition to conventional and satellite observations which are used in operational forecasts. Although typically only 160 CHAMP profiles are assimilated daily, it is demonstrated that they reduce NWP temperature analysis and forecast mean and root mean square (RMS) differences against radiosondes in the upper troposphere and lower stratosphere. A significant impact is found in the Southern Hemisphere where 24 to 96 hour forecast 250 hPa temperature RMS differences are reduced by ~0.1 K. No improvement in humidity forecasts is found because refractivity values below 4 km are not used in the experiment. These results are encouraging and would support the case for using CHAMP measurements in NWP if they were available in near real time.
Healy Sorcha B.
Jupp A. M.
Marquardt Christoph
No associations
LandOfFree
Forecast impact experiment with GPS radio occultation measurements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Forecast impact experiment with GPS radio occultation measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Forecast impact experiment with GPS radio occultation measurements will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1359395