Measurement of cirrus cloud optical properties as validation for aircraft and satellitebased cloud s

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Measurement of cirrus cloud optical properties as
validation for aircraft- and satellite-based
cloud studies
Daniel H. DeSlover (Dave Turner, Ping
Yang) University of Wisconsin -
Madison Cooperative Institute for Meteorological
Satellite Studies Space Science and Engineering
Center
MURI Workshop, 7-9 June 2005
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Instrument Suite
Atmospheric State Measurements NCAR
Cross-chain Loran Sounding System (CLASS),
Vaisala sondes Aircraft (ER-2 or Proteus)
Measurements High spectral resolution FTS
NAST-I (NASA LaRC) or S-HIS (UW) Surface
Measurements High spectral resolution FTS
Atmospheric Emitted Radiance
Interferometer (AERI) CART Micropulse Lidar
(MPL), CART Raman Lidar (CARL), or
High Spectral Resolution Lidar (HSRL)
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Data Analysis Flow Chart Absorption Optical Depth
Input data Radiosonde (atmospheric state)
Lidar (cloud boundaries) FTS
(emitted radiance)
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AERI Measured Downwelling Radiance
1 2 3 4 5 6 7 8
9 10 11 12
13 14 15
16 17 18 19
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Cirrus Cloud Absorption Optical Depth Yields
Effective Particle Size Retrieval
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AERI Measured Cirrus Particle Size Retrieval 8
Dec 2000
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AERI Measured Cirrus Particle Size Retrieval 8
Dec 2000
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AERI Absorption Optical Depth and Total Optical
Depth for Retrieved Size
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Simulation Data Retrieval
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Case Study, AFWEX 2000 8 Dec 2000
GOES IR Imagery 8 Dec 2000 0100 through 0245 UTC
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NAST-I and AERI Measured Cirrus Spectral Optical
Depth 8 Dec 2000
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Case Study, AFWEX 2000 8 Dec 2000
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Case Study, AFWEX 2000 8 Dec 2000
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Case Study, AFWEX 2000 8 Dec 2000
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Case Study, AFWEX 2000 8 Dec 2000
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Case Study, AFWEX 2000 8 Dec 2000
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Case Study, TX2002 29 Nov 2002
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Case Study, TX2002 29 Nov 2002 Four S-HIS
Overpasses
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Case Study, TX2002 29 Nov 2002 Four S-HIS
Overpasses
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-sample AERI
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Case Study, TX2002 29 Nov 2002 Rapid-scan AERI
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Summary, Future Work, and References
High spectral resolution FTS measurements were
used to infer cirrus cloud optical depth from
both aircraft- and ground-based
platforms, demonstrated good agreement for
similar measurements above (NAST-I and S-HIS)
and below (AERI) cloud, good correlation
between ground-based AERI and Raman
lidar, rapid-sample AERI data greatly improves
ability to resolve cloud features same
approach can be used to validate AIRS
measurements from Aqua. First attempt at
particle size retrieval was successful for two
case studies (AFWEX 2000 and TX2002).
DeSlover, D. H., W. L. Smith, P. K. Piironen, and
E. W. Eloranta (1999) A methodology for
measuring cirrus cloud visible to infrared
optical depth ratios. J. Atmos. Oceanic
Technol., 16, pp. 251--262. Smith, W. L., S.
Ackerman, H. Revercomb, H. Huang, D. H. DeSlover,
W. Feltz, L. Gumley, and A. Collard (1998)
Infrared spectral absorption of nearly invisible
cirrus clouds. Geophys. Res. Lett., 25, pp.
1137-1140.