PI: Irina Sokolik OVERALL GOAL:

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Presentation transcript:

Subcontractor: University of Colorado at Boulder Starting Date: May 1, 2002 PI: Irina Sokolik OVERALL GOAL: establish a framework for the development of a new physically-based treatment of mineral dust for IR high resolution spectral remote sensing YEAR 1 ACTIVITIES: Development of new aerosol models: Developed and tested new high resolution optical models of Asian dust and several individual aerosol species. These models were incorporated into a new database called HROMAA (High Resolution Optical Models of Atmospheric Aerosols) available online to the MURI Team: http://irina.colorado.edu/HROMAA/ Forward modeling&sensitivity studies: Linked kCARTA and DISORT that was modified to handle the new aerosol models. The code was used to perform forward modeling to determine the sensitivity of IR high-resolution spectral radiances to various dust characteristics (such as dust composition, vertical distribution, particle sizes, etc., see Examples 1 and 2). The main goal was to test robustness of a ‘negative slope’ approach for the detection of dust from high spectral resolution sensing. NAST-I data analysis: Received NAST-I raw data from the Smith group and started to work on the analysis of spectra acquired over the Yellow Sea in spring of 2001. Collected and analyzed various data (meteorological, satellite, lidar network, etc.) available for this time period over East Asia to support the analysis of NAST-I data. Examination of Asian dust outbreaks based on observational data and MM5 simulations has been started.

The negative slope is present in both cases Example 1: Effect of the vertical profile of dust on brightness temperature Green – clear sky; Red – dust layer from 1013 to 701.2 mb; Blue – dust layer from 900 to 600mb The negative slope is present in both cases Negative slope kCARTA+DISORT, spectral resolution = 0.0025 cm-1

The negative slope is present in both cases Example 2: Effect of dust particle sizes on brightness temperature Green – clear sky; Red – dust with Deff= 1.72 mm; Blue – dust with Deff= 2.44 mm The negative slope is present in both cases kCARTA+DISORT, spectral resolution = 0.0025 cm-1 Negative slope