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Extreme Precipitation Events over Southern Mexico : Sensitivity of Wrf Simulations to Cloud Microphysics Parameterizations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Raga, Graciela Binimelis De |
| Copyright Year | 2010 |
| Abstract | Mexico is characterized by a variety of climates, from extreme desert conditions in the Northwest region to tropical jungle in the Southeast (between 15o N and 18o N). The state of Oaxaca is located between 15.65o and 18.65o north latitude, and between 93.86o and 98.53o west longitude, southwest of the Tehuantepec Istmus. This region that receives over 2000 mm annual average of accumulated precipitation, is characterized by a very complex topography, with mountain ranges reaching 3000m above mean sea level less than 100Km from the coasts, enhances the potential of orographic precipitation (Fig 1). The purpose of this investigation is to evaluate the role that WRF-model microphysics parameterizations have in the development of extreme precipitation events in the southern state of Oaxaca, Mexico, a region that by the characteristics mentioned above, is very susceptible to flooding and landslides. Considering only the rainy summer season in Mexico (from May to October), gamma PDF’s were constructed at each climatology station of selected coastal regions in Oaxaca. Daily accumulated precipitation values over the 95 percentile of the gamma PDF were selected to identify extrema. This study concentrates mainly on three cases. The first one (0600 GMT 04 June 2008) was produced by the remnants of the tropical storm Arthur (31 May 2008 through 01 June 2008) that induced instabilities in the region of the Gulf of Tehuantepec. Later, an easterly wave by 1200 GMT 03 June 2008 originated a cyclonic system that was not documented by the National Hurricane Center. On June 4 2008, 180 mm of daily accumulated precipitation fell at the location of Union Hidalgo. Figure 2a shows the UV satellite image at the time of event. The second case (0600 GMT 07 July 2008) originated from the remnants of the tropical depression 5E in the Pacific Ocean (5 -7 July 2008), an eastward propagating disturbance |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ams.confex.com/ams/pdfpapers/171738.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
