15th Conference on Planned and Inadvertent Weather Modification


Microphysical characteristics of convective clouds in northern Mexico and impacts on hygroscopic seeding experiments

Daniel W. Breed, NCAR, Boulder, CO; and R. T. Bruintjes and V. Salazar

As part of the Program for the Augmentation of Rainfall in Coahuila (PARC) and the Durango Rainfall Induction Program (DRIP), an instrumented cloud physics research aircraft was used to obtain measurements of the microphysical characteristics of summertime convective clouds in the States of Coahuila and Durango in the north of Mexico during the summers of 1996 to 1999.

The data included measurements of Cloud Condensation Nuclei (CCN), aerosol spectra and the evolution of precipitation in the clouds. These measurements are critical to the evaluation of the hygroscopic seeding experiments that are currently being conducted in the region.

The paper will describe the microphysical characteristics of clouds in the region and the evolution of precipitation in these clouds for different types of environmental conditions that are evident during the summer months. In addition, the impacts on precipitation enhancement studies will also be discussed.

Session 5, Physical evidence on the effects of weather modification programs including area and hydrology aspects, pollution effects on cloud microphysical parameters and processes
Thursday, 18 January 2001, 8:30 AM-10:00 AM

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