CHARACTERISTICS OF CHANGE AND TRANSPORTOF AEROSOLS IN THE MIDDLE AND UPPER TROPOSPHERE AND STRATOSPHERE OVER INDIAN OCEAN AND CHINA IN 1984-2000

Wang Kaicun; Li Weiliang; Bai Lijie

Vol.15, NO.1, 2004

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2004 > 15(1): 32-39

Wang Kaicun, Li Weiliang, Bai Lijie. Characteristics of change and transportof aerosols in the middle and upper troposphere and stratosphere over Indian Ocean and China in 1984-2000. J Appl Meteor Sci, 2004, 15(1): 32-39.

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CHARACTERISTICS OF CHANGE AND TRANSPORTOF AEROSOLS IN THE MIDDLE AND UPPER TROPOSPHERE AND STRATOSPHERE OVER INDIAN OCEAN AND CHINA IN 1984-2000

1.
Department of Atmospheric Science of College of Physics , Pek ing University , Beijing 100871
2.
Chinese Academy of Meteorological Sciences , Beijing 100081

Received Date: 2002-11-26
Rev Recd Date: 2003-04-02
Publish Date: 2004-02-29

Abstract

Abstract

The latest version (6.0) daily aerosols extinction dataset of the 1.020 μm zone SAGE Ⅱ was analyzed, and the characteristics of transport and change of aerosol optical depth in the middle and upper troposphere and the stratosphere (above 10 kilometer high) was given. The results show that aerosol optical depth in the low latitude is larger than that in the higher latitude. There are three high value centers over the island in Indian Ocean. The high value centers of aerosol optical depth are corresponding with the high value of up flow in the middle and upper troposphere. Comparing to the average of the 17 years (1984—2000), latest 6 years the aerosol optical depth from the Bengal Bay to the southeast of the Tibetan Plateau increases distinctively. Contrary to the middle and eastern of China, the aerosol optical depth over the eastern of China is decreased. Aerosol optical depth has three longitudinal increasing zones and two longitudinal decreasing zones. The Brewer-Dobson circulation between the middle latitude and the equator area causes these longitudinal change zones. This transporting of aerosols between the lower layer and middle and upper layer atmosphere may cause important climate change。
- Aerosols;
- Longitudinal change;
- Brewer-Dobson circulation

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References(18)

Figures and Tables

图 1 1984～2000年平均气溶胶光学厚度

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图 2 1984～1998年300 hPa 年平均垂直速度ω

(单位:Pa/ s ；正的ω表示下沉运动，负的ω表示上升运动，绝对值表示运动速度的大小)

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图 3 1984～2000年气溶胶光学厚度倾向(单位:a^-1)

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图 4 1995～2000年气溶胶光学厚度与17年(1984～2000年)平均的差

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图 5 1984～2000年15 km 高度气溶胶消光系数线性倾向(单位:0.1 a^-1)

Fig. 5 英文标题

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图 6 1984～1998年7月平均垂直速度ω图(a)850 hPa，(b)300 hPa

(单位:Pa/ s .正的ω表示下沉运动，负的ω表示上升运动,绝对值表示运动速度的大小)

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