EVIDENCE FOR LIQUID-PHASE CIRRUS CLOUD FORMATION FROM VOLCANIC AEROSOLS - CLIMATIC IMPLICATIONS

被引:66
作者
SASSEN, K
机构
[1] Department of Meteorology, University of Utah, Salt Lake City
关键词
D O I
10.1126/science.257.5069.516
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Supercooled droplets in cirrus uncinus cell heads between -40-degrees and -50-degrees-C are identified from Project FIRE [First ISCCP (International Satellite Cloud Climatology Project) Regional Experiment] polarization lidar measurements. Although short-lived, complexes of these small liquid cells seem to have contributed importantly to the formation of the cirrus. Freezing-point depression effects in solution droplets, apparently resulting from relatively large cloud condensation nuclei of volcanic origin, can be used to explain this rare phenomenon. An unrecognized volcano-cirrus cloud climate feedback mechanism is implied by these findings.
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页码:516 / 519
页数:4
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