| 华北段农牧交错带气候变化特征及其响应 |
| |
| 引用本文： | 李敏敏,延军平.华北段农牧交错带气候变化特征及其响应[J].干旱区资源与环境,2013(5):100-106. |
| |
| 作者姓名： | 李敏敏 延军平 |
| |
| 作者单位： | 陕西师范大学旅游与环境学院 |
| |
| 基金项目： | 国家自然科学基金项目“部分重大自然灾害的时空对称性:结构、机理与适应对策”(41171090)资助 |
| |
| 摘 要： | 依据华北段农牧交错带1961-2010年气象资料,利用标准化降水指数(SPI)、Mann-Kendall检验等方法对研究区的气候变化特征进行了分析。结果显示:1)近50a来,华北段农牧交错带以1987年为界划分为两个时期,此前为冷期,此后为暖期。其年平均气温线性增温速率为0.35℃/10a,冬季增温最显著,其次为春季、秋季、夏季。气温在1993年发生突变。2)年降水量呈下降趋势,倾向率为-6.51mm/10a,夏季降水的减少对其贡献率最大。3)气温突变后,极端旱涝灾害事件减少,中旱灾害频率在增加,气候变化整体呈现暖干趋势。
|
| 关 键 词： | 华北段农牧交错带 气候变化 旱涝灾害 SPI |
The characteristics and response of climate change in farming-pastoral ecotone of North China |
| |
| LI Minmin,YAN Junping.The characteristics and response of climate change in farming-pastoral ecotone of North China[J].Journal of Arid Land Resources and Environment,2013(5):100-106. |
| |
| Authors: | LI Minmin YAN Junping |
| |
| Institution: | (College of Tourism and Environmental Sciences,Shaanxi Normal University,Xi’an 710062,P.R.China) |
| |
| Abstract: | Relying on the meteorological data of farming-pastoral ecotone of North China from 1961 to 2010,the characteristics of climate change in research area were analyzed using standardized precipitation index(SPI),Mann-Kendall test,etc.The results show that: 1): In the last 50 years,the annual average temperature linear warming rate in farming-pastoral ecotone of North China was 0.35℃/10a,where winter warming was the most significant,followed by spring,fall and summer.1987 was the demarcation of the two periods,before was the cold period,followed by a warm period.Temperature mutated at the 1993.2): The rate of annual precipitation declining tendency was-6.51mm/10a,summer precipitation reduce contributed mostly to the rate.3):After the temperature mutation,extreme droughts and floods events were reduced,the medium drought disaster frequency increased,the overall climate change presented a warming and drying trend. |
| |
| Keywords: | farming-pastoral ecotone of North China climate change droughts and floods SPI |
| 本文献已被 CNKI 等数据库收录！ |
|
