1. (2)Battelle Memorial Institute, 2101 Wilson Boulevard, Suite 800,
Visibility Analysis of Class I Areas Using Multiple Satellite Products & In-Situ Ground Based Measurements
Nikisa Jordan(1), Jill Engel-Cox(2,1), Raymond Hoff(1), Kevin McCann(1), Kamonayi Mubenga(1)
(1)CREST, Joint Center for Earth Systems Technology, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD,
(2)Battelle Memorial Institute, 2101 Wilson Boulevard, Suite 800,
Arlington, VA

2. Objective
Current methods & tools for studying visibility impairment involve
Ground-based back trajectory receptor models
Surface point measurements
This research offers a new approach of studying the sources of visibility degradation to Class I areas
Satellites can provide a better understanding of the pollutant source and, potentially, its concentration in protected sites.
Suites of satellite and ground-based measurements were used to provide an enhanced understanding of pollutant sources to protected areas

3. Data Used In-Situ Spaceborne IMPROVE surface monitors
National Park Service (NPS) Webcam images
EPA PM2.5 data was used in addition to IMPROVE aerosol data
NOAA Air Resources Laboratory (ARL) (HYbrid Single-Particle Lagrangian Integrated Trajectory) HYSPLIT model
Spaceborne
NASA MODerate Resolution Imaging Spectroradiometer (MODIS) true color images
NASA MODIS Aerosol Optical Depth (AOD)
NOAA GOES Aerosol & Smoke Product (GASP) AOD
NOAA Hazard Mapping System (HMS) Fire and Smoke Product

4. Modified from Source: EPA http://www. epa. gov/air/visibility/monitor