JpGU-AGU Joint Meeting 2017

講演情報

[EE]Eveningポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS08] [EE] 雲降水過程の統合的理解に向けて

2017年5月23日(火) 17:15 〜 18:30 ポスター会場 (国際展示場 7ホール)

[AAS08-P18] The role of soil moisture in convective rains in the central region of Mexico

*Edgar Dolores1Ernesto Caetano1 (1.National Autonomous University of Mexico)

キーワード:soil moisture, convective precipitation, mesoscale

Precipitation in the central region of Mexico during the summer occurs more frequently during the afternoons. Local surface heat and moisture fluxes represent a major source of convective rainfall in Mexico during the summer, driven by positive evaporation-precipitation feedback. The effects of soil moisture are directly reflected in the limitation of evapotranspiration, affecting the development of the planetary boundary layer and, therefore, the initiation and intensity of convective precipitation. This study presents preliminary analysis of the role of soil moisture in convective rains in central Mexico, for which a methodology for the detection of convective initiations similar to Taylor (2015) has been considered. The results show that the moisture fluxes from the surface influence the development of convection favored by mesoscale circulations at low levels. Initiations are more frequent in regions less humid than their surroundings with the very strong signal during the month of September.