Study of atmospheric vertical structure and distribution characteristics over Arctic region in summer

Chen Zhikun; Li Zhiqiang; Ding Minghu

doi:10.3969/j.issn.0253-4193.2015.11.007

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Chen Zhikun, Li Zhiqiang, Ding Minghu. Study of atmospheric vertical structure and distribution characteristics over Arctic region in summer[J]. Haiyang Xuebao, 2015, 37(11): 68-78. doi: 10.3969/j.issn.0253-4193.2015.11.007

Citation:

Chen Zhikun, Li Zhiqiang, Ding Minghu. Study of atmospheric vertical structure and distribution characteristics over Arctic region in summer[J]. Haiyang Xuebao, 2015, 37(11): 68-78. doi: 10.3969/j.issn.0253-4193.2015.11.007

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Study of atmospheric vertical structure and distribution characteristics over Arctic region in summer

doi: 10.3969/j.issn.0253-4193.2015.11.007

1.
National Marine Environmental Forecasting Center, Beijing 100081, China
2.
Institute of Polar Meteorology, Chinese Academy of Meteorological Sciences, Beijing 100081, China

Received Date: 2015-05-18

Abstract

Abstract

Atmospheric vertical structure is a significant element to study planetary boundary layer and simulate atmospheric circulation. Therefore, based on the GPS radiosonde data obtained from the 6th Chinese Arctic expedition during summer of 2014, the vertical structure of the troposphere and the boundary layer characteristics over high latitude region of the northern hemisphere and the Arctic region were analyzed. The results show that: (1) LRT and CPT can both estimate the tropopause. The NCEP reanalysis data can represent the characteristics of tropopause over lower latitude area properly, however, it is not as well in the Arctic region where ice concentration is more than 90%. It is of importance to carry out GPS radiosonde. (2) These GPS soundings reveal a vertical domain of low temperature and high wind speed, which correspond to the tropopause. When it is sunny or cloudless, the tropopause tends to stable along the variation of the latitude. On the contrary, when it is cloudy or rainy, the tropopause tends to decrease at latitudes form 60°N to 82°N. (3) The height of the CPT and high wind speed both remarkably decrease in the region with latitude higher than 75°N. (4) All 6 regions have inversions in the boundary layer. The peaks of wind speed in the boundary layer result to weaken the reversion or make the reversion disappear.
- atmospheric vertical structure over Arctic region,
- GPS radiosonde,
- tropopause,
- planetary boundary layer height

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References(25)

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