Thursday, 26 January 2012
LASE Measurements of High Resolution Water Vapor Profiles During NASA Hurricane Field Experiments
Hall E (New Orleans Convention Center )
The Lidar Atmospheric Sensing Experiment (LASE) has been used to measure high resolution profiles of water vapor, aerosols, and clouds from several different aircraft platforms. LASE has made these measurements during four major NASA field experiments over the past 11 years over the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico. Salient features of these measurements will be presented including results from the most recent NASA GRIP (Genesis and Rapid Intensification Processes) field experiment which was conducted during August and September 2010 from operational bases in Fort Lauderdale, FL and St. Croix, VI. Examples of these measurements include moisture fields over synoptic scales, large gradients of moisture from regions of descending air to the center of tropical storms, measurements over the eye of hurricanes, and moisture gradients associated with the vertical wind shear. LASE measurements from these field experiments have been used at the Florida State University to conduct data assimilation and numerical weather prediction studies. It was found that inclusion of LASE data improved quantification of humidity fields and improved hurricane model forecasts. LASE measurements have also been used to study tropical storm and hurricane processes associated with the Saharan Air Layer (SAL) including moistening of the SAL and transfer of latent heat, injection of dust in an updraft, and influence of dry air intrusion on storm development.
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