地理学报

地理学报 ›› 1993, Vol. 48 ›› Issue (5): 394-402.doi: 10.11821/xb199305002

• 论文 • 上一篇    下一篇

南极地区冰雪消失对全球大气环流和气候影响的数值模拟

杨修群1, 谢倩2, 黄士松1   

  1. 1. 南京大学大气科学系,南京210008;
    2. 空军气象学院气象系,南京　211101
  • 出版日期:1993-09-15 发布日期:1993-09-15
  • 基金资助:
    国家基础性研究关键性重大项目《气候动力学和气候预测理论》;国家自然科学基金共同资助

NUMERICAL SIMULATION OF INFLUENCE OF ANTARCTIC LAND ICE-SNOW COVER DISAPPEARANCE ON ATMOSPHERIC GENERAL CIRCULATION AND CLIMATE

Yang Xiuqun1, Xie Qian2, Huang Shisong1   

  1. 1. Department of Atmospheric Sciences, Nanjing University 210008;
    2. Meteorological Institute of Air Force, Nnajing　211101
  • Online:1993-09-15 Published:1993-09-15

PDF (PC)

赞

被引次数

14

摘要： 本文利用全球大气环流模式通过数值模拟研究了北半球夏季南极地区冰雪覆盖的消失对大气环流和全球气候影响的过程。结果表明南极冰雪消失不仅影响南半球大气环流异常,而且通过引起热带环流异常如增强东亚季风环流和减弱Walker环流等引起北半球大气环流和我国夏季气候的异常。南极冰雪覆盖的消失将给全球气候带来严重后果。文中也对南极冰雪气候效应的动力学机制进行了讨论。

关键词: 南极冰雪, 气候异常, 数值模拟

Abstract: By using a perpetual July，nine-level general circulation spectral model with rhomboidal truncation at wavenumber 15，incorporated with a comprehensive set of physical processes，two numerical experiments,i. e. one with normal Antarctic land ice-snow cover and the other without Antarctic land ice-snow cover,were conducted to study the influence of the removal of Antarctic land ice-snow cover on general circulation of atmosphere and global climate. The results exhibit that the removal of Antarctic land ice-snow cover may induce global atmospheric anomalies， which is characterized by}l)The increase of air temperature with a maximum abnormal center ex- ceeding 6. 0 degree in the Antarctic land areas and the weakening of Antarctic polar vortex and westerlies at the high latitudes of Southern Hemisphere，2)The anomalies of ultra-long waves es-pecially those at wavenumber 3 in the Southern Hemisphere，3)The intensification of summer monsoon circulation of east Asia and the weakening of equatorial Walker circulation，4 ) The in-crease of precipitation over east Asia and the coast areas and the decrease of that over equatorial western Pacific，5)The exciting of the two leading wavetrains of the east Asian and the Eurasian patterns in the Northern Hemisphere，6)Climatic anomalies in China with decrease of air tempera-ture in northeastern China and with increase of precipitation in southern China. Therefore，the Antarctic land ice-snow cover plays an important role in the formation of general circulation and climate. The removal of it may lead a serious consequence for global climate. The dynamical mechanism of climatic effect of Antarctic land ice-snow cover is also discussed in this paper.

Key words: Antarctic land ice-snow cover, climate anomalies, numerical simulation