自然资源学报 ›› 2011, Vol. 26 ›› Issue (5): 825-835.doi: 10.11849/zrzyxb.2011.05.010

• 资源评价 • 上一篇    下一篇

西北地区近50年日照时数和风速变化特征

黄小燕, 张明军, 王圣杰, 辛宏, 贺晋云   

  1. 西北师范大学 地理与环境科学学院,兰州 730070
  • 收稿日期:2010-05-20 修回日期:2010-12-01 出版日期:2011-05-20 发布日期:2011-05-20
  • 通讯作者: 张明军 E-mail:mjzhang2004@163.com
  • 作者简介:黄小燕(1984- ),女,湖北宜城人,硕士研究生,主要从事全球环境变化方面的研究工作。E-mail: xyhuang0529@sina.cn
  • 基金资助:

    国家自然科学基金项目(40701035, 40631001, 40571033);教育部新世纪优秀人才支持计划(NCET-10-0019);陇原青年创新人才扶持计划;西北师范大学知识与科技创新工程创新团队项目(NWNU-KJCXGC-03-66);西北师范大学知识与科技创新工程;科研骨干培育项目(NWNU-KJCXGC-03-78);西北师范大学自然地理学省级重点学科资助。

Characteristics of Variation in Sunshine Duration and Wind Speed in the Last 50 Years in Northwest China

HUANG Xiao-yan, ZHANG Ming-jun, WANG Sheng-jie, XIN Hong, HE Jin-yun   

  1. Geography and Environment College, Northwest Normal University, Lanzhou 730070, China
  • Received:2010-05-20 Revised:2010-12-01 Online:2011-05-20 Published:2011-05-20

摘要: 利用中国西北地区(甘肃、宁夏、青海、陕西以及新疆地区)1960—2009年112个观测站日照时数、风速和气温等资料,分析了近50 a中国西北地区日照时数和风速的年、季节、月的时空变化特征以及风速和气温的相关性。研究表明:近50 a来西北地区日照时数大部分地区表现为显著的减少趋势,平均每10 a减少13.6 h,1981年发生突变;空间分布上以新疆中部地区、关中平原和秦巴山地减少最为突出,季节上以夏、冬两个季节的减少趋势最显著。该区年平均风速也呈明显减少趋势,平均每10 a减少0.09 m·s-1,其西部地区的减少率大致高于东部地区的减少率,以新疆大部分地区、青海大部分地区以及河西走廊减少最为明显;并且风速与平均气温、平均最高气温、平均最低气温有一定的相关性。

关键词: 西北地区, 日照时数, 风速

Abstract: Based on the data of sunshine duration, wind speed and temperature collected at 112 stations from 1960 to 2009 in Northwest China (covering Gansu, Ningxia, Qinghai, Shaanxi and Xinjiang), spatial and temporal (for annual, seasonal and monthly) variations of sunshine duration and wind speed, as well as the correlation coefficients between wind speed and temperature were analyzed. The result showed that the sunshine duration displays a marked decreasing tendency in the last 50 years with a decreasing rate of 13.6 h (10 a)-1, while a sudden change is found in 1981. A distinct decreasing occurs in central Xinjiang, Guanzhong Plain and Qinling-Daba Mountains in spatial distribution, and it is most prominent in seasonal distribution in summer and winter. The annual average wind speed is decreasing at a rate of 0.09 m s-1(10 a)-1. The decrement rate in the western part of the study area is higher than that in the eastern part, especially in most part of Xinjiang and Qinghai, as well as Hexi Corridor. Wind speed showed a relevance, to some degree, with average temperature, average maximum temperature and average minimum temperature.

Key words: Northwest China, sunshine duration, wind speed

中图分类号: 

  • P422.1