Characteristics of katabatic winds from Dome A to the coast of Prydz Bay, Antarctica

Sun Qizhen; Zhang Zhanhai; Fu Min; Li Chunhua; Qin Ting; Ding Zhuoming; Zhao Jiechen

doi:10.12284/hyxb2021079

Volume 43 Issue 7

Jul. 2021

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Sun Qizhen，Zhang Zhanhai，Fu Min, et al. Characteristics of katabatic winds from Dome A to the coast of Prydz Bay, Antarctica[J]. Haiyang Xuebao，2021, 43(7)：125–137 doi: 10.12284/hyxb2021079

Citation:

Sun Qizhen，Zhang Zhanhai，Fu Min, et al. Characteristics of katabatic winds from Dome A to the coast of Prydz Bay, Antarctica[J]. Haiyang Xuebao，2021, 43(7)：125–137 doi: 10.12284/hyxb2021079

Citation:

Sun Qizhen，Zhang Zhanhai，Fu Min, et al. Characteristics of katabatic winds from Dome A to the coast of Prydz Bay, Antarctica[J]. Haiyang Xuebao，2021, 43(7)：125–137 doi: 10.12284/hyxb2021079

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Characteristics of katabatic winds from Dome A to the coast of Prydz Bay, Antarctica

doi: 10.12284/hyxb2021079

1.
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Ministry of Natural Resources, Beijing 100081, China
3.
Polar Research Institute of China, Shanghai 200136, China

Received Date: 2020-04-02
Rev Recd Date: 2020-04-26

Available Online: 2021-04-16

Publish Date: 2021-07-25

Abstract

Abstract

Using archived data from Chinese Polar Numerical Weather Forecasting System (PNWFS) and America Antarctic Mesoscale Prediction System, the spatial and temporal distribution of katabatic winds and air mass flux from Dome A to the coast of Prydz Bay are analyzed, and basic characteristics of katabatic winds in the region are depicted. It is found that the katabatic winds in this area is strongly affected by the terrain of the Antarctica ice sheet. Steep terrain such as the western side of the Amery Ice Shelf sees stronger katabatic winds than smooth terrain does; and the katabatic winds vary greatly with the season for temporal distribution with stronger winds in winter. Adiabatic warming, which can be found in the area where strong katabatic winds flow, causes increasing of near surface temperature at the Amery Ice Shelf. The maximum katabatic wind speed zone is located at a height of about 100 m to 200 m above the ground. Katabatic winds extents to higher altitudes while surface winds are stronger. The surface air mass flux of the katabatic winds along the coast of the Prydz Bay is extremely uneven in spatial and temporal distribution. Strong katabatic winds in the Amery Ice Shelf are linked to more mesoscale cyclone activities in the Prydz Bay waters. The process of mesoscale cyclones induced by katabatic winds in the Prydz Bay is worthy of attention, thus the mechanism of cyclogenesis forced by katabatic winds needs further notice.
- Antarctica,
- katabatic winds,
- atmospheric surface mass flux,
- mesoscale cyclone

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References(48)

References

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