地理学报 ›› 2015, Vol. 70 ›› Issue (7): 1125-1136.doi: 10.11821/dlxb201507009
强芳(), 张明军(
), 王圣杰, 刘杨民, 任正果, 朱小凡
收稿日期:
2015-01-13
修回日期:
2015-04-12
出版日期:
2015-07-20
发布日期:
2015-07-20
作者简介:
作者简介:强芳(1987-), 女, 甘肃武威人, 硕士生, 主要从事全球变化方面的研究。E-mail:
基金资助:
Fang QIANG(), Mingjun ZHANG(
), Shengjie WANG, Yangmin LIU, Zhengguo REN, Xiaofan ZHU
Received:
2015-01-13
Revised:
2015-04-12
Online:
2015-07-20
Published:
2015-07-20
Supported by:
摘要:
基于国家气象信息中心发布的全国0.5°×0.5°逐日降水量数据集和气象站点日降水量实测资料,利用主成分分析(PCA)和回归分析,研究了1961-2012年祁连山面雨量年际变化以及面雨量距平与干旱累计强度的关系。结果表明,该套格点数据能够很好地反映出祁连山及其周边区域降水的时空分布格局,山区降水量大于平原区降水量,山区东段降水量大于西段降水量。1961-2012年祁连山面雨量的多年平均值为724.9×108 m3,其中,春、夏、秋、冬的面雨量分别为118.9×108 m3、469.4×108 m3、122.5×108 m3、14.1×108 m3,夏季面雨量最大,占全年的64.76%。除春季外,其他季节面雨量都呈现逐年增加趋势,夏季增幅最大,平均每年增加1.7×108 m3。山区面雨量与祁连山及其周边区域的干湿程度表现出较好的相关性,干旱累计强度与面雨量表现出负相关性,山区面雨量较多时这一地区的干旱强度也较弱。
强芳, 张明军, 王圣杰, 刘杨民, 任正果, 朱小凡. 基于格点数据的1961-2012年祁连山面雨量特征分析[J]. 地理学报, 2015, 70(7): 1125-1136.
Fang QIANG, Mingjun ZHANG, Shengjie WANG, Yangmin LIU, Zhengguo REN, Xiaofan ZHU. Changes of areal precipitation based on gridded dataset in Qilian Mountains during 1961-2012[J]. Acta Geographica Sinica, 2015, 70(7): 1125-1136.
表3
1961-2012年祁连山面雨量各季节年代际平均值(108 m3)"
时段 | 春 | 夏 | 秋 | 冬 | 年 |
---|---|---|---|---|---|
1961-1970 | 138.4 | 422.2 | 117.3 | 10.0 | 687.9 |
1971-1980 | 86.4 | 470.4 | 123.5 | 14.1 | 694.4 |
1981-1990 | 134.4 | 476.6 | 126.5 | 15.4 | 752.9 |
1991-2000 | 110.7 | 462.3 | 98.9 | 15.2 | 687.0 |
2001-2010 | 124.6 | 494.0 | 147.8 | 16.1 | 782.5 |
1961-1986 | 117.3 | 455.8 | 121.1 | 12.5 | 706.7 |
1987-2012 | 120.5 | 483.0 | 124.0 | 15.6 | 743.1 |
1961-2012 | 118.9 | 469.4 | 122.5 | 14.1 | 724.9 |
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