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Lidar cloud studies for FIRE and ECLIPSOptical remote sensing measurements of cirrus cloud properties were collected by one airborne and four ground-based lidar systems over a 32 h period during this case study from the First ISCCP (International Satellite Cloud Climatology Program) Regional Experiment (FIRE) Intensive Field Observation (IFO) program. The lidar systems were variously equipped to collect linear depolarization, intrinsically calibrated backscatter, and Doppler velocity information. Data presented describe the temporal evolution and spatial distribution of cirrus clouds over an area encompassing southern and central Wisconsin. The cirrus cloud types include: dissipating subvisual and thin fibrous cirrus cloud bands, an isolated mesoscale uncinus complex (MUC), a large-scale deep cloud that developed into an organized cirrus structure within the lidar array, and a series of intensifying mesoscale cirrus cloud masses. Although the cirrus frequently developed in the vertical from particle fall-streaks emanating from generating regions at or near cloud tops, glaciating supercooled (-30 to -35 C) altocumulus clouds contributed to the production of ice mass at the base of the deep cirrus cloud, apparently even through riming, and other mechanisms involving evaporation, wave motions, and radiative effects are indicated. The generating regions ranged in scale from approximately 1.0 km cirrus uncinus cells, to organized MUC structures up to approximately 120 km across.
Document ID
Document Type
Contractor Report (CR)
Sassen, Kenneth (Utah Univ. Salt Lake City., United States)
Grund, Christian J. (Wisconsin Univ. Madison., United States)
Spinhirne, James D. (NASA Goddard Space Flight Center Greenbelt, MD., United States)
Hardesty, Michael (National Oceanic and Atmospheric Administration Boulder, CO., United States)
Alvarez, James (NASA Langley Research Center Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
August 6, 1990
Subject Category
Report/Patent Number
NAS 1.26:186384
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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