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| 基于SPI的西北地区气候干湿变化 | |
| 引用本文： | 翟禄新,冯起. 基于SPI的西北地区气候干湿变化[J]. 自然资源学报, 2011, 26(5): 847-857. DOI: 10.11849/zrzyxb.2011.05.012 |
| 作者姓名： | 翟禄新 冯起 |
| 作者单位： | 1. 广西师范大学 环境与资源学院,广西 桂林 541004; 2. 兰州大学 资源环境学院,兰州 730000; 3. 广西环境工程与保护评价重点实验室,广西 桂林 54100; 4. 中国科学院 寒区旱区环境与工程研究所,兰州 730000 |
| 基金项目： | 国家自然科学基金，广西教育厅科研项目，广西师范大学重点项目，广西师范大学博士科研启动基金 |
| 摘 要： | 干旱是西北地区乃至全国主要的自然灾害之一。论文应用标准化降水指数(SPI)对西北地区近50 a来不同时段的特旱和重旱发生频次及其空间分布进行了计算分析,结果表明:标准化降水指数(SPI)作为一种干旱重建指标,适用于西北地区,也可以作为气候变化的监测指标;降水量的西增东减趋势与干旱频次的西部和东北减少、东南增加相对应,亦即气候变化在某种程度上缓解了新疆北部和青海西部的干旱,但加重了甘肃东南部和陕西中南部的干旱;与气候变化相对应,全西北地区干旱频次有总体下降的趋势,尽管干旱发生的地域持续在改变。 |
| 关 键 词： | 气候变化 干旱 标准化降水指数(SPI) 西北地区 |
| 收稿时间： | 2010-02-10 |
| 修稿时间： | 2010-12-20 |
Dryness/Wetness Climate Variation Based on Standardized Precipitation Index in Northwest China |
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| ZHAI Lu-xin,FENG Qi. Dryness/Wetness Climate Variation Based on Standardized Precipitation Index in Northwest China[J]. Journal of Natural Resources, 2011, 26(5): 847-857. DOI: 10.11849/zrzyxb.2011.05.012 | |
| Authors: | ZHAI Lu-xin FENG Qi |
| Affiliation: | 1. School of Environment and Resources, Guangxi Normal University, Guilin 541004, China; 2. College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China; 3. Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin 54100; 4. Cold and Arid Regions Environment and Engineering Research Institute, CAS, Lanzhou 730000, China |
| Abstract: | Drought is one of the main natural disasters in Northwest China,even in the whole country.In this article,the standardized precipitation index(SPI) was applied to reconstruct the drought at the different time scales in recent 50 years in Northwest China.Then the frequency and the spatial distribution were calculated and analyzed for the severely dryness and extremely dryness.The results show that SPI used as a drought reconstruction index,is suitable in Northwest China,and may also be taken as the monitor i... |
| Keywords: | climate change drought standardized precipitation index(SPI) Northwest China |
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