干旱区生态环境知识资源中心(Arid): 民勤荒漠化过程中气候综合指标的年际变化

Arid

	民勤荒漠化过程中气候综合指标的年际变化
其他题名	The annual variation of climatic comprehensive index in the desertification process of Minqin county in China
	李晋昌 1; 魏振海 2; 张彩霞 2
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2010
卷号	24 期号:4 页码:72-76
中文摘要	气候变化和荒漠化是全球性的重大环境问题. 民勤作为我国最典型的干旱荒漠化区域,近50年生态环境呈持续恶化趋势. 选择相对湿度、降水量、蒸发量、气温、日照时数和起沙风日数作为指标因子,采用加权求和的方法,对1956-2005年民勤各季节及全年气候整体环境的年际变化利用气候荒漠化指数进行了评价. 结果表明:民勤1956-2005年春季气候总体处于重度恶劣等级,其他季节和全年处于中度恶劣等级;春季、秋季和冬季气候环境长期变化趋势不明显,夏季和全年气候虽有明显好转趋势,但本世纪以来仍处于中度恶劣等级;气候好转程度对荒漠化进程并未产生明显影响,在总体处于中度恶劣等级的气候背景下,人类活动是导致民勤荒漠化的主导因素;逐渐好转的气候环境将对该区生态环境的恢复产生积极的意义,政府可以在有利的气候背景下制定更加合理有效的荒漠化防治措施.
英文摘要	Climate change and desertification are critical environmental problems in the world. In recent 50 years, the ecological environment in Minqin which be as the most typical arid desertification region showed a gradually degraded trend. Selecting relative humidity, precipitation, evaporation, temperature, sunshine hours and the days of sand driving wind as index factors, we analyzed the annual variation of climatic comprehensive index in different seasons and the whole year in Minqin from 1956 to 2005 based on climatic desertification index obtained using the weigh sun method. Our results showed that in all, the climate was in the severe abominable grade in spring in Minqin from 1956-2005, and which all were in moderate abominable grades in other seasons and the whole; the long-term variation trends of climate environment were not obvious in spring, autumn and winter, and which had obviously improved trends in summer and the whole year, but still were in moderate abominable grades in the early 21th century; the degree of climate improvement did’t have an obvious effect on the desertification developing. In the climate background with moderate abominable grade, human activities were the leading factor caused desertification in Minqin; the gradually improved climate environment will produce positive significance on the restoration of ecological environment, and in the favorable climate background, the government can make more reasonable and effective measures for controlling desertification.
中文关键词	荒漠化 ; 气候荒漠化指数 ; 年际变化 ; 民勤
英文关键词	desertification climatic desertification index annual variation Minqin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3920455
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225135
作者单位	1.山西大学黄土高原研究所, 太原, 山西 030006, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	李晋昌,魏振海,张彩霞. 民勤荒漠化过程中气候综合指标的年际变化[J]. 中国科学院西北生态环境资源研究院,2010,24(4):72-76.
APA	李晋昌,魏振海,&张彩霞.(2010).民勤荒漠化过程中气候综合指标的年际变化.干旱区资源与环境,24(4),72-76.
MLA	李晋昌,et al."民勤荒漠化过程中气候综合指标的年际变化".干旱区资源与环境 24.4(2010):72-76.