近43年西藏高原20cm地温对气温和降水变化的响应

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• 英文论文题名：Response of Soil Temperature at Depth of 20 cm to Air Temperature and Precipitation in Tibet from 1971 to 2013
• 论文作者：周刊社 ; 陈华 ; 卓嘎
• 英文论文作者：Zhou Kanshe ; Chen Hua ; Zhuo Ga ; Tibet Climatic Center ; Tibet Atmospheric Detection Technology and Equipment Support Center
• 年：2016
• 作者机构：西藏自治区气候中心;西藏自治区大气探测技术与装备保障中心;
• 论文关键词：地温 ; 年际和年代际变化 ; 气候突变 ; Mann-Kendall检验
• 英文论文关键词：soil temperature ; interannual and interdecadal variations ; abrupt change of climate ; Mann-Kendall test
• 会议召开时间：2016-11-01
• 会议录名称：第33届中国气象学会年会 S3 青藏高原与复杂山地天气气候
• 语种：中文
• 分类号：P467;P423
• 学会代码：ZGQX
• 会议名称：第33届中国气象学会年会
• 会议地点：中国陕西西安
• 主办单位：中国气象学会
• 学会名称：中国气象学会
• 页数：8
• 文件大小：596k
• 原文格式：D
• 会议级别：全国

摘要

为了全面了解西藏高原20 cm耕作层地温受气候变化的影响情况,为西藏生态环境保护及农牧业可持续发展提供科学依据。基于1971—2013年西藏8个气象站的地温、气温和降水资料,分析了地温与气温及降水的变化关系。结果表明,各站年气温和地温均呈显著的增温趋势(P<0.05),冬、春季的季气温和地温升温率明显大于夏、秋季;西藏西部和西藏中部各地增温趋势明显大于西藏东部,且大部分站点和时段地温增温率大于气温增温率。年、季气温和地温的年代际变化表现为:20世纪70—80年代偏低,90年代正常,21世纪前10年明显偏高。各站年、湿季、干季地温与同期气温均呈极显著正相关(P<0.01);湿季西藏中部和西藏东部各站地温与同期降水量呈显著负相关(P<0.05),且地温与同期气温及降水的相关程度湿季均大于干季。
The paper aims to fully understand how soil temperature of the cultivated horizon is affected by climate change in Tibet, to provide a scientific basis for protecting ecological environment and sustaining the development of farming and animal husbandry for the government and society. Response of soil temperature to air temperature and precipitation were investigated in this paper with the observational data from the 8 representative meteorological stations during the period of 1971-2013. The results showed that: air temperature and soil temperature in 20 cm depth increased significantly in Western and Central than Eastern, showed a significant warming trend, and the rise of air temperature and soil temperatures in each season and annual also showed the same regional characteristic. And air temperature and soil temperatures were significantly higher in spring and winter than other seasons. It was found that annual, seasonal air temperature and soil temperature in 20 cm depth were lower than the standard value in 1970 s and 1980 s, were normal in 1990 s, were significantly higher than the standard value in decade of the 21 st century, anomaly of warming in the Western and Central was bigger than in Eastern. The study also found that there was a extremely significant positive correlation(P<0.01) between soil temperature of annual, the rainy season, the dry season and the same period of air temperature or precipitation, It was found that the correlation in rainy season was greater than in dry season, and there was a negative correlation between soil temperature and precipitation in the same period, there was a significant negative correlation between soil temperature and precipitation in the Central and Eastern in wet season(P<0.05), and the correlation between soil temperature and air temperature or precipitation in wet season were higher than in dry season.

引文

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