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南极Dome A至普里兹湾沿岸下降风特征

孙启振 张占海 付敏 李春花 秦听 丁卓铭 赵杰臣

孙启振,张占海,付敏,等. 南极Dome A至普里兹湾沿岸下降风特征[J]. 海洋学报,2021,43(7):125–137 doi: 10.12284/hyxb2021079
引用本文: 孙启振,张占海,付敏,等. 南极Dome A至普里兹湾沿岸下降风特征[J]. 海洋学报,2021,43(7):125–137 doi: 10.12284/hyxb2021079
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

南极Dome A至普里兹湾沿岸下降风特征

doi: 10.12284/hyxb2021079
基金项目: 国家重点研发计划(2018YFA0605902,2016YFC1402705);国家自然科学基金(41876212);极地考察业务化与科研(2021)
详细信息
    作者简介:

    孙启振(1984-),男,山东省日照市人,副研究员,从事极地气象研究和预报。E-mail:sunqizhen@nmefc.cn

  • 中图分类号: P425

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

  • 摘要: 本文利用我国极地数值天气预报系统和美国南极中尺度预报系统的存档数据,分析了Dome A至普里兹湾沿岸地区下降风风场的时空分布和大气质量通量,给出了该地区下降风的基本特点。该地区下降风受南极冰盖地形影响强烈,艾默里冰架西侧等陡峭地区风速总体较大;下降风随季节变化较大,冬季的下降风较强。强下降风在前进过程中有绝热增温现象,并给艾默里冰架西部带来近表层升温。下降风风速最大处位于地面以上约100~200 m高度,风速较大地区的下降风在垂直方向上分布较为深厚。下降风在普里兹湾沿岸的表层大气质量通量在时空分布上极不均匀,艾默里冰架西侧的下降风气流较强时,普里兹湾海域有较多的中尺度气旋活动。下降风引发普里兹湾中尺度气旋旋生的过程值得关注,需进一步研究下降风引发中尺度气旋的机理。
  • 图  1  南极大陆冬季表层流场分布

    底图等高线间隔为500 m,红色、蓝色、绿色和黑色圆点分别表示Dome A、泰山站、中山站和艾默里冰架西侧位置

    Fig.  1  Streamlines over Antarctica in winter

    Contour interval is 500 m on the base map; the red, blue, green and black dots indicate Dome A, Taishan Station, Zhongshan Station and west of Amery Ice Shelf, respectively

    图  2  我国极地数值天气预报系统(a)与美国南极中尺度预报系统(b)的区域设置

    Fig.  2  Domains of the Chinese Polar numerical weather prediction system (a) and the America Antarctic mesoscale prediction system (b)

    图  3  南极Dome A至普里兹湾沿岸地区2014年1月至2016年12月的月平均风场

    Fig.  3  Monthly mean wind patterns of the Dome A to Prydz Bay area, Antarctica, from January 2014 to December 2016

    图  4  南极Dome A、泰山站、中山站以及艾默里冰架西侧等地点的风速(a)和风向(b)垂直分布

    Fig.  4  Profiles of wind speed (a) and wind direction (b) at Dome A, Taishan Station, Zhongshan Station and west of Amery Ice Shelf, Antarctica

    图  5  南极冬季Dome A附近A点(80.0°S, 80.0°E)至大陆沿岸B点(67.5°S, 80.0°E) (a)和艾默里冰架西侧C点(71.0°S, 60.0°E)至东侧D点(71.0°S, 75.0°E) (b)下降风垂向剖面图

    Fig.  5  The profile of Antarctic winter katabatic winds of Dome A (80.0°S, 80.0°E) to coast (67.5°S, 80.0°E) (a) and west (71.0°S, 60.0°E) to east (71.0°S, 75.0°E) of Amery Ice Shelf (b)

    图  6  南极Dome A至普里兹湾沿岸地区2014−2016年季节平均的表层大气质量通量

    a. 3−5月;b. 6−8月;c. 9−11月;d. 12月至翌年2月

    Fig.  6  Seasonally mean of surface air mass flux from the Dome A to the coast of Prydz Bay, Antarctica, during 2014 to 2016

    a. March to May; b. June to August; c. September to November; d. December to February of the following year

    图  7  南极艾默里冰架2014−2016年季节平均的位温(a−d)和2 m气温场和10 m风场(e−h)

    a, e. 3−5月;b, f. 6−8月;c, g. 9−11月;d, h. 12月至翌年2月

    Fig.  7  Seasonally mean of potential temperature (a−d) and 2 m air temperature and 10 m wind (e−h) of Amery Ice Shelf, Antarctica, during 2014 to 2016

    a, e. March to May; b, f. June to August; c, g. September to November; d, h. December to February of the following year

    图  8  南极普里兹湾沿岸季节平均表层大气质量通量经向分布

    MAM:3−5月;JJA:6−8月;SON:9−11月;DJF:12月至翌年2月;MAX−MIN:季节平均最大值与最小值之差

    Fig.  8  Seasonally mean of longitudinal distribution of surface air mass flux along the coast of Prydz Bay, Antarctica

    MAM: March to May; JJA: June to August; SON: September to November; DJF: December to February of the following year; MAX−MIN: difference of maximum and minimum seasonally mean

    图  9  南极中山站附近区域1979−2013年平均气旋活动分布(引自文献[20])

    a. 9−11月;b. 12月至翌年2月;c. 3−5月;d. 6−8月。星号表示中山站的位置,红点表示气旋数量≥40个;紫点表示30个≤气旋数量<40个;黄点表示20个≤气旋数量<30个;绿点表示10个≤气旋数量<20个;蓝点表示1个≤气旋数量<10个

    Fig.  9  The distribution of cyclones number density near the Zhongshan Station, Antarctica (cited from reference [20])

    a. September to November; b. December to February of the following year; c. March to May; d. June to August. The asterisk indicate the location of Zhongshan Station, and the red dots indicate the number of cyclones ≥40; the purple dots indicate 30≤ number of cyclones <40; the yellow dots indicate 20≤ number of cyclones <30; the green dots indicate 10≤number of cyclones <20; the blue dots indicate 1 ≤ number of cyclones <10

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  • 收稿日期:  2020-04-02
  • 修回日期:  2020-04-26
  • 网络出版日期:  2021-04-16
  • 刊出日期:  2021-07-25

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