DISTRIBUTION OF PARTICULATE SULFUR IN THE WINTER ARCTIC STRATOSPHERE : BALLOON-BORNE MEASUREMENTS OF PARTICLE NUMBER CONCENTRATION

• Main Authors: ワタナベ マサハル, イワサカ ヤスノブ, ハヤシ マサヒコ, ナガタニ マサヒロ, ナカダ ヒロシ, アダチ ヒロシ, フジワラ モトオ, Masaharu WATANABE, Yasunobu IWASAKA, Masahiko HAYASHI, Masahiro NAGATANI, Hiroshi NAKADA, Hiroshi ADACHI, Motowo FUJIWARA, Hartwig GERNANDT, Roland NEUBER
• Format: Report
• Language: English
• Published: Solar Terrestrial Environmental Laboratory, Nagoya University 1997
• Subjects: Arctic; Norway; Polar meteorology and glaciology; Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3978; http://id.nii.ac.jp/1291/00003978/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3978&item_no=1&attribute_id=18&file_no=1

Balloon-borne measurements of the size-number concentration of atmospheric particles were made in December 1994 and January 1995 at Ny-Alesund, Norway (79°N, 12°E). The measurements showed that the number concentration of stratospheric particles was 2 particles/(cm)^3 (particle diameter≧0.3μm) and 5×(10)^<-2> particles/(cm)^3 (particle diameter≧1.2μm) at the potential temperature height of 370K (near the height of the background aerosol layer peak) on December 18,1994,and 2 particles/(cm)^3 (particle diameter≧0.3μm) and 2×(10)^<-3> particles/(cm)^3 (particle diameter≧1.2μm) at the potential temperature height of 370K on January 17,1995. The number-size distribution function of the background sulfate particles showed noticeable decrease of particle concentration in the size range of 0.5-0.8μm in diameter in the heights of 350K-370K potential temperature from December 1994 to January 1995,suggesting that sulfate particles growing through up-take of water vapor descended in the winter polar stratosphere.The winter polar stratosphere functions as one possible sink in the global budget of atmospheric sulfur.