Comparison of lidar water vapor measurements at Fixed PISA 2

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Presentation transcript:

Comparison of lidar water vapor measurements at Fixed PISA 2 Kevin Vermeesch1, David Whiteman2, Zhien Wang3, Richard Ferrare4, Amin Nehrir4, Belay Demoz1 1University of Maryland Baltimore County, Baltimore, MD 2NASA Goddard Space Flight Center, Greenbelt, MD 3University of Wyoming, Laramie, WY 4NASA Langley Research Center, Hampton, VA PECAN Science Workshop Norman, OK 19 September 2016

Content NASA ALVICE PECAN dataset PECAN Raman lidar H2O data available for comparisons with ALVICE, CRL, LASE, and radiosonde

ALVICE PECAN Operations Summary June 22, 2015 ALVICE deployed May 17 – July 18, 2015 34 experimental periods for a total of more than 250 hours of operation Next day data products Water vapor mixing ratio Aerosol backscatter and depolarization Nebraska Colorado Kansas ALVICE GLOW Oklahoma X-BADGER

Data Release Status Report Large data release very shortly Vast majority of data is of high quality Optimized detectors for UT/LS measurements introduced larger overlap effects Electronics overheating and other interferences caused various data processing issues Second data release with improved corrections by end of year Analysis delayed due to trailer damage on return trip from Kansas. Repairs of trailer now completed. Laser under repair now.

lidar water vapor comparisons Definitions ALVICE (NASA/GSFC) = Atmospheric Laboratory for Validation, Interagency Collaboration and Education CRL (Univ. Wyoming) = Compact Raman Lidar LASE DIAL (NASA/LaRC) = Lidar Atmospheric Sensing Experiment Differential Absorption Lidar Overpass defined as aircraft within 20 km radius of FP2 (data has been subsetted) Use comparison method of Behrendt et al. (2007), bias and RMS deviations between two sensors CRL overpassed on 6 days, 114 minutes available for comparison LASE overpassed on 6 days, 34 minutes available for comparison Compare FP2 radiosonde data when available

Future work Upload 1st ALVICE release to PECAN archive Improved corrections for ALVICE data (2nd release – end of year) Contact us if you would like to work with numerical data Perform planned comparison of lidar data