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中国农学通报 ›› 2020, Vol. 36 ›› Issue (7): 99-104.doi: 10.11924/j.issn.1000-6850.casb18110013

所属专题: 农业气象

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

1973—2017年藏北高寒牧区主要气象要素变化特征分析

次央1, 洛桑平措2, 罗布1()   

  1. 1 西藏自治区气候中心,拉萨 850000
    2 西藏自治区大气探测技术与装备保障中心,拉萨 850000
  • 收稿日期:2018-11-05 修回日期:2019-02-14 出版日期:2020-03-05 发布日期:2020-03-02
  • 通讯作者: 罗布
  • 作者简介:次央,女,1972年出生,四川甘孜人,本科,主要从事气象灾害防御与高原气候变化。通信地址:850000 西藏拉萨市林廓北路2号 西藏自治区气候中心,E-mail:3172521590@qq.com。
  • 基金资助:
    国家自然科学基金项目“基于多源卫星数据藏北高原地表温度与湿地变化特征研究”(41665002);自治区重点科技计划“藏北典型生态区生态环境遥感监测评估”(XZ201703-GA-01);中国气象局成都高原气象研究所开放基金项目“利用遥感资料反演藏西北高寒牧区草地陆面温度”(LPM2014005)

The Variation Characteristics of Main Meteorological Elements in the Northern Tibetan Plateau from 1973 to 2017

Ci Yang1, Luo Sangpingcuo2, Nor Bu1()   

  1. 1 Climate Center of Tibet Autonomous Region, Lhasa 850000
    2 Tibet Autonomous Region Atmospheric Detection Technology and Equipment Support Center, Lhasa 850000
  • Received:2018-11-05 Revised:2019-02-14 Online:2020-03-05 Published:2020-03-02
  • Contact: Bu Nor

摘要:

为分析全球气候变化下藏北高原主要气象要素的变化特征,采用趋势分析、小波分析、突变点分析等研究方法,利用逐月站点气象数据,分析了1973—2017年藏北高原地区的主要气象要素的多尺度时间变化特征。结果表明:在全球气候变化下藏北高寒牧区的各主要气象要素变化显著,其中气温以0.45℃/10 a速率显著的升高,风速以-0.27 m/(s·10 a)速率呈极显著减小趋势,降水以6.48 mm/10 a速率呈不显著增加趋势;从季节变化来看,春季较为特殊,表现为增温缓慢、风速减幅最大、降水增加最为显著等特点,其他季节在各要素上变化较为均匀;周期变化上在去除显著的全球变暖的线性趋势后气温和降水都存在显著的准3年周期变化,且在发生时域上有互补特征。

关键词: 藏北高原, 高寒牧区, 主要气象要素, 变化趋势, 周期变化

Abstract:

To analyze the variation characteristics of main meteorological elements in the northern Tibetan Plateau under the global climate change, the trend analysis, wavelet analysis and mutational point analysis were used to study the multi-scale time-varying characteristics of the elements based on the monthly meteorological data. The results showed that: under the global climate change, the major meteorological elements in the study area changed significantly, and the temperature increased significantly at a rate of 0.45°C/10 a, and the wind speed decreased significantly at a rate of -0.27 m/(s·10 a), and the precipitation increased insignificantly at a rate of 6.48 mm/10 a; from the seasonal changes, the spring change was more special, which was characterized by the slowest temperature increase, the largest decrease of wind speed and the most significant increase in precipitation, the other seasons were more uniform in each factor. In the cyclical change, there was a significant quasi-3 period change in temperature and precipitation after removing the linear trend of significant global warming, and there was a complementary feature in the occurrence time domain.

Key words: the northern Tibet plateau, alpine pastoral areas, major meteorological elements, changing trend, cyclical change

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