| 近50年黄土高原气候变化特征分析 |
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| 引用本文： | 李振朝,韦志刚,文军,符睿.近50年黄土高原气候变化特征分析[J].干旱区资源与环境,2008,22(3):57-62. |
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| 作者姓名： | 李振朝 韦志刚 文军 符睿 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,兰州,730000;中国科学院研究生院,北京,100039
2. 中国科学院寒区旱区环境与工程研究所,兰州,730000 |
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| 基金项目： | 中国科学院科研基金
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中国科学院"百人计划" |
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| 摘 要： | 利用黄土高原地区55个气象台站1951-2000年50年的气温和降水逐日资料,分析了黄土高原地区气温和降水的地理分布特征和气候变化特征;把黄土高原地区分成4个小区,利用小波分析的方法研究了各个小区气温和降水的多时间尺度特征。结果表明:黄土高原多年平均年降水量的地理分布总趋势是南多北少,东多西少,由东南向西北递减,近50年来的降水是逐渐减少的;气温的地理分布特点也是南高北低,东高西低,由东南向西北递减,近50年来的气温是在逐渐上升的;各区降水主要存在准3a周期、8-12a和准22a周期,年平均气温的准3年周期在少数时段通过了显著性检验。
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| 关 键 词： | 黄土高原 气候特征 小波分析 |
| 文章编号： | 1003-7578(2008)03-057-06 |
| 修稿时间： | 2007年1月22日 |
Analyses on Climate Variation Characteristics Over the Loess Plateau in Recent 50 Years |
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| LI Zhen-chao,WEI Zhi-gang,WEN Jun,FU Rui.Analyses on Climate Variation Characteristics Over the Loess Plateau in Recent 50 Years[J].Journal of Arid Land Resources and Environment,2008,22(3):57-62. |
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| Authors: | LI Zhen-chao WEI Zhi-gang WEN Jun FU Rui |
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| Abstract: | Using the daily data of temperature and precipitation from 55 weather stations in Loess Plateau region during 1951-2000,the spatial distribution and climate variation characteristics of temperature and precipitation over this area were studied.The Loess Plateau was partitioned 4 small areas and the multi-temporal scale characteristics of temperature and precipitation over every area were studied with the method of wavelets analysis.Some conclusions were as follows: For the precipitation over the Loess Plateau,the mean annual precipitations over south and east areas were more than that north and west areas,and decreased gradually in recent 50 years.For the temperature,the mean annual values over south and east areas were higher than that north and west areas,and increased gradually in recent 50 years.There were quasi-3a,8-12a and quasi-22a periods in precipitation over every areas.The quasi-3a period of mean annual temperature passes the remarkable test only in several periods. |
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| Keywords: | Loess Plateau climatic characteristic wavelet analysis |
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