干旱区研究

• 亚洲中部生态与环境 •    下一篇

亚洲中部干旱区降水异常的大气环流特征

杨莲梅1,2,  关学锋1,2,张迎新1,2   

  1. (1.中国气象局乌鲁木齐沙漠气象研究所,新疆 乌鲁木齐 830002; 2.中亚大气科学研究中心,新疆 乌鲁木齐 830002)
  • 收稿日期:2017-09-22 修回日期:2017-11-21 出版日期:2018-03-15 发布日期:2018-04-18
  • 基金资助:
    国家自然科学基金项目(41565003,41661144024);科技部公益性行业科研专项(GYHY201506009);中央级公益性科研院所基本科研业务费专项资金项目(IDM2016001)

Study on atmospheric circulation characteristics of precipitation anomalies in arid region of Central Asia

YANG Lian-Mei1,2, GUAN Xue-feng1,2,ZHANG Yin-xing1,2   

  1. (1. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;2.Center of Central Asia Atmospheric Science Research, Urumqi 830002, China)
  • Received:2017-09-22 Revised:2017-11-21 Online:2018-03-15 Published:2018-04-18

摘要: 亚洲中部干旱区(中亚五国和新疆)是地中海气候与东亚季风气候的过渡带,区域天气气候与欧洲和东亚季风区迥异,具有世界独特的干旱区生态气候模式,即山地森林草原—盆地平原绿洲寓于荒漠,并与荒漠共存的生态气候地理格局。天气气候受高、中、低纬环流的共同影响,区域内部差异很大,形成多背景、多因子、多尺度影响下的极具代表性的气象灾害孕育和成灾环境。亚洲中部干旱区光热资源丰富、蒸发量大、气温变化剧烈,而降水稀少,且分布极不均匀,天山山脉的中西段是降水高值区,近百年来整体表现为增暖、增湿趋势。高、中、低纬系统和中亚低值系统的活跃,共同造就了中亚东部(新疆)降水年代际和年际异常增多。西亚西风急流是联系高、中、低纬环流系统相互作用的纽带。目前,该区域气象综合观测网建设不能满足应对气候变化的需求,同时对区域特有的环流系统、灾害性天气气候发生规律和形成机理、高分辨率区域数值模式、地—气相互作用对区域天气气候的影响、气候变化预估等方面的研究也较薄弱,开展上述研究对“丝绸之路经济带”可持续发展具有重要科学意义和战略价值。

关键词: 天气, 气候特征, 降水异常, 大气环流, 水汽, 中亚干旱区(亚洲中部干旱区)

Abstract: As climate transition zone between Mediterranean climate region and East Asian monsoon region, arid region of Central Asia (including five Central Asian countries and Xinjiang province of China) which is influenced by high, middle and low latitude circulations has different synoptic-climatic characteristics from that of Europe and East Asia while its climate characteristics also varies greatly within the region. Central Asia has unique and complicated topography and ecosystem patterns like deserts, oasis, glaciers and basins, forming a highly representative meteorological disaster-breeding environment under the influence of multiple-background, multiple-factor and multiple-scale. This area has abundant solar-heat energy, large evaporation and dramatic temperature changes. Besides, its precipitation is scarce and has extremely uneven distribution with high value in the western and middle parts of Tianshan Mountains. Over the last one hundred years, Central Asia has experienced a warm and wet trend. Central Asia low value system together with the high, middle and low latitude circulation systems linked by West Asia westerly jet stream have contributed to the interdecadal and interannual variations of precipitation in Xinjiang. However, due to the insufficient construction of integrated meteorological observation network, the studies concerning regional featured circulation system, regularity and mechanism of disastrous weathers, high resolution regional numerical model, impacts of land-atmosphere interaction on regional weather and climate change prediction are still inadequate. Correspondingly, to carry out those studies has essential scientific significance and strategic value for the sustainable social and economic development in Silk Road Economic Belt.

Key words: Arid region of Central Asia, synoptic-climatic characteristics, precipitation anomaly, atmospheric circulation, water vapor