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Journal article

Aircraft measurements of microphysical properties of subvisible cirrus in the tropical tropopause layer

Lawson R, Pilson B, Baker B, Mo Q, Jensen E, Pfister L, Bui P ...see all

Atmospheric Chemistry and Physics Discussions, vol. 7, issue 3 (2007) pp. 6255-6292

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Abstract

Subvisible cirrus (SVC) clouds are often observed within the tropical tropopause layer (TTL). Some studies suggest that SVC has a significant impact on the earth radiation budget. The Costa Rica Aura Validation Experiment (CR-AVE) sponsored by the National Aeronautics and Space Administration (NASA) took place near San Jose, Costa Rica from 14 January-15 February 2006. The NASA WB-57F sampled SVC in the TTL from -75 degrees C to -90 degrees C with an improved set of cloud particle probes. The first digital images of ice particles in the TTL are compared with replicator images of ice particles collected in 1973 by a WB-57F in the TTL. The newer measurements reveal larger particles, on the order of 100 mu m compared with

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Authors

  • R. P. Lawson

  • B. Pilson

  • B. Baker

  • Q. Mo

  • E. Jensen

  • L. Pfister

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