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Ground-Based Lidar Measurements During the CALIPSO and Twilight Zone (CATZ) CampaignThe CALIPSO and Twilight Zone (CATZ) field campaign was carried out between June 26th and August 29th of 2007 in the multi-state Maryland-Virginia-Pennsylvania region of the U.S. to study aerosol properties and cloud-aerosol interactions during overpasses of the CALIPSO satellite. Field work was conducted on selected days when CALIPSO ground tracks occurred in the region. Ground-based measurements included data from multiple Cimel sunphotometers that were placed at intervals along a segment of the CALIPSO ground-track. These measurements provided sky radiance and AOD measurements to enable joints inversions and comparisons with CALIPSO retrievals. As part of this activity, four ground-based lidars provided backscatter measurements (at 523 nm) in the region. Lidars at University of Maryland Baltimore County (Catonsville, MD) and Goddard Space Flight Center (Greenbelt, MD) provided continuous data during the campaign, while two micro-pulse lidar (MPL) systems were temporarily stationed at various field locations directly on CALIPSO ground-tracks. As a result, thirteen on-track ground-based lidar observations were obtained from eight different locations in the region. In some cases, nighttime CALIPSO coincident measurements were also obtained. In most studies reported to date, ground-based lidar validation efforts for CALIPSO rely on systems that are at fixed locations some distance away from the satellite ground-track. The CATZ ground-based lidar data provide an opportunity to examine vertical structure properties of aerosols and clouds both on and off-track simultaneously during a CALIPSO overpass. A table of available ground-based lidar measurements during this campaign will be presented, along with example backscatter imagery for a number of coincident cases with CALIPSO. Results indicate that even for a ground-based measurements directly on-track, comparisons can still pose a challenge due to the differing spatio-temporal properties of the ground and satellite observations. The multiple-lidar data during the CATZ campaign is expected to provide additional information on regional aerosol and cloud dynamics for give overpass, and enable a more realistic assessment of ground-to-satellite correlations. Future work is anticipated to finalize calibrated lidar backscatter profiles and utilization of wind trajectory information to further enable comparisons to CALIPS data.
Document ID
20080043874
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Berkoff, Timothy
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Qian, Li
(Maryland Univ. College Park, MD, United States)
Kleidman, Richard
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Stewart, Sebastian
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Welton, Ellsworth
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Li, Zhu
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holbem, Brent
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
May 26, 2008
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: Spring Amerian Geophysical Union (AGU) Joint Assembly
Location: Fort Lauderdale, FL
Country: United States
Start Date: May 26, 2008
End Date: May 30, 2008
Distribution Limits
Public
Copyright
Other

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