Differences in the fractions of ice clouds between eastern and western parts of Eurasian continent using CALIPSO in January 2007

Akira Yamauchi, Kazuaki Kawamoto, Hajime Okamoto

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Abstract

We investigated the difference in the fraction of ice (water) cloud bins between eastern and western parts of Eurasia using Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) data in January 2007. The fraction of ice cloud bins between −25 and 0 °C was clearly larger in eastern Eurasia than in western Eurasia. A significantly increased (about 20–30%) fraction of ice-containing clouds is observed in eastern Eurasia in the cloud top temperatures range from −30 to −15 °C. The difference in ice cloud bin fractions between eastern and western Eurasia was remarkable between −20 and −5 °C, being about 20% greater in eastern Eurasia. The fraction of ice cloud bins in the lower troposphere (below 3 km) was larger in eastern Eurasia than in western Eurasia. These results indicate that the ice formation process was more promoted in the lower troposphere in eastern Eurasia than in western Eurasia. This is the first time such results have been obtained from cloud internal structure observations using the CALIPSO active sensor.

Original languageEnglish
Article numbere807
JournalAtmospheric Science Letters
Volume19
Issue number3
DOIs
Publication statusPublished - Mar 2018

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All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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