Representation of Ethiopian Wet Spells in Global and Nested Models
Joint Authors
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-03-05
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Weather forecast and reanalysis models exhibit different performance in daily rainfall estimation over the Ethiopian highlands, 2000–2012, with ECMWF closer to observations than other models.
Background is given to illustrate the Hadley circulation and easterly jets over Ethiopia, using sections on 37°E in July–August 2011.
ECMWF reanalysis has a narrow band of rainfall >15 mm/day on 10°N, consistent with TRMM satellite estimates, associated with a steep gradient in meridional wind.
MERRA and GFS models have a wider band of rainfall and weaker gradients in meridional winds.
The contrasting background states influence a nested WRF model simulation of heavy rain in the upper Nile Valley on 29 July, 2011.
The GFS (ECMWF) initialization yields stronger northerly (southerly) winds north (south) of Ethiopia, while aircraft observations are southerly at 850 mb and northerly at 700 mb.
ECMWF produces heavy and widespread rainfall consistent with observations, with a potentially more realistic simulation of the Hadley circulation.
American Psychological Association (APA)
Jury, Mark R.& Chiao, Sen. 2014. Representation of Ethiopian Wet Spells in Global and Nested Models. Advances in Meteorology،Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-456242
Modern Language Association (MLA)
Jury, Mark R.& Chiao, Sen. Representation of Ethiopian Wet Spells in Global and Nested Models. Advances in Meteorology No. 2014 (2014), pp.1-12.
https://search.emarefa.net/detail/BIM-456242
American Medical Association (AMA)
Jury, Mark R.& Chiao, Sen. Representation of Ethiopian Wet Spells in Global and Nested Models. Advances in Meteorology. 2014. Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-456242
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-456242