TEMPORAL DEVELOPMENT OF MT-PINATUBO AEROSOLS AS OBSERVED BY LIDAR AND SUN PHOTOMETER AT NY-ALESUND, SPITSBERGEN

被引:17
作者
BEYERLE, G
HERBER, A
NEUBER, R
GERNANDT, H
机构
[1] Alfred Wegener Institute for Polar and Marine Research, Potsdam
关键词
D O I
10.1029/95GL02470
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Since summer 1991 multiwavelength lidar and sun photometer observations of the Pinatubo aerosol layer are performed at the Arctic NDSC station (Koldewey-Station) in Ny-Alesund, Spitsbergen. The height integrated backscatter coefficient and the optical density decrease exponentially in time with time constants of 0.89+/-0.39 and 0.94+/-0.37 years, respectively. Their wavelength dependence indicates a decrease in median particle radii between 1992 and 1993. It is shown that the observations are consistent with results of parameter-free model calculations. The calculations are based on the assumption that gravitational sedimentation is the dominant process for volcanic aerosol removal in the Arctic stratosphere.
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页码:2497 / 2500
页数:4
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