Characteristics of the seasonal variations of the near surface layer parameters on the antarctic-ice sheet in Princess Elizabeth Land,East Antarctica

CHEN Zhi-gang; BIAN Lin-gen; XIAO Cun-de; LU Long-hua; IAN Allison

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CHEN Zhi-gang, BIAN Lin-gen, XIAO Cun-de, LU Long-hua, IAN Allison. Characteristics of the seasonal variations of the near surface layer parameters on the antarctic-ice sheet in Princess Elizabeth Land,East Antarctica[J]. Haiyang Xuebao, 2006, 28(1): 35-41.

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Characteristics of the seasonal variations of the near surface layer parameters on the antarctic-ice sheet in Princess Elizabeth Land,East Antarctica

1.
Chinese Academy of Meteorological Sciences, Beijing 100081, China
2.
Australian Antarctic Division and Antarctic CRC, Hobart, Tasmania, 7001, Australia

Received Date: 2004-12-20
Rev Recd Date: 2005-05-18

Abstract

Abstract

The meteorological parameters near the surface layer from AWS on the Antarctic ice sheet in Princess Elizabeth L and East Antarctica in 2002 were used to investigate the characteristics of meteorological factors including sensible heat flux(Q_h),lat ent heat flux(Q_e),Richardson number(R_i),bulk transport cofficient(C_d) ect;,and compare them with meteorological factors for the corresponding period at Zhongshan Station.It shows that the annual air temperature at LGB69 Station is-25.6℃,and 16.4℃ lower than of Zhongshan Station,because of their difference in altitude and position.The tem perature lapse rate is about 1℃/110 m for the initial from coast to inland.The turbulence flux of Antarctic ice sheet displays an obvious seasonal variation,the average sensible heat flux is -17.9 W/m² and the average latent heat flux is -0.9 W/m²,the heat source int ensity(Q_h+Q_e) is -18.8 W/m²,which means the surface obtains energy from atmosphere.The nearsurface at mosphere is controlled by near-neutral stratifications in which bulk transport cofficient(C_d) is 2.8×10^-3,and it is constant when the wind speed surpass 10 m/s.There is the typical source of the katabatic wind at LGB69,where speed is 2m/s higher than that of Zhongshan Station and higher frequency than that of Zhong shan Station.
- antarctic ice sheet,
- turbulence flux,
- katabatic wind,
- seasonal variation

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References(11)

References

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