| 西南喀斯特地区中层土壤湿度时空变化特征 |
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| 引用本文： | 潘媞,李蓉,袁淑杰,何兴潼,谷晓平.西南喀斯特地区中层土壤湿度时空变化特征[J].高原山地气象研究,2020,40(1):61-66. |
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| 作者姓名： | 潘媞 李蓉 袁淑杰 何兴潼 谷晓平 |
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| 作者单位： | 四川省气象服务中心,成都 610071;兰州中心气象台,兰州 730000;成都信息工程大学大气科学学院,成都 610225;四川省泸州市气象台,泸州 646000;贵州省生态气象和卫星遥感中心,贵阳 550002 |
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| 基金项目： | 西部山地突发性暴雨形成机理及预报理论方法研究(2018YFC1507200) |
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| 摘 要： | 本文利用中国西南喀斯特区域内该区域内全部31个农业气候站点1991~2013年50cm层土壤湿度(体积含水量)旬资料,应用线性趋势分析、EOF空间分解方法,详细分析其时空演变特征,进一步认识中国西南喀斯特地区土壤湿度的时空演变特征,结果表明:(1)西南喀斯特地区中层土壤湿度多年平均的空间大小及分布具有明显的区域性差异。(2)1991~2013年季节平均中,中层秋季的土壤湿度整体最高,夏季土壤湿度的低值区范围最大,反映了西南喀斯特地区土壤的独特性。(3)中层土壤湿度年际变化有明显的"南升北降"空间分布特征,相应线性趋势分析和EOF的结果也同样印证了这一主要特征。(4)50cm的年际变化较稳定且波动趋势较小;整体的土壤湿度以夏、秋季最高,春、冬季较低。
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| 关 键 词： | 中层土壤湿度 时空变化特征 线性趋势分析 EOF |
| 收稿时间： | 2019-09-27 |
Temporal and Spatial Variation Characteristics of Mid-Level Soil Moisture in Karst Areas of Southwest China |
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| PAN Ti,LI Rong,YUAN Shujie,HE Xingtong,GU Xiaoping.Temporal and Spatial Variation Characteristics of Mid-Level Soil Moisture in Karst Areas of Southwest China[J].Plateau and Mountain Meteorology Research,2020,40(1):61-66. |
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| Authors: | PAN Ti LI Rong YUAN Shujie HE Xingtong GU Xiaoping |
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| Institution: | 1. Meteorlogical Service Center of Sichuan Meteorlogical Bureau, Chengdu, Sichuan 610072, China;2. Lanzhou Central Meteorological Bureau, Lanzhou, Gansu 730030, China;3. School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, Sichuan 610072, China;4. Luzhou Meteorological Bureau, Luzhou, Sichuan 646000, China;5. Guizhou Ecological Meteorological and Satellite Remote Sensing Center, Guiyang, Guizhou 550002, China |
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| Abstract: | Using the soil moisture(volume water content)data of 50cm layer from 1991 to 2013 in all 31 agricultural climate sites in the southwestern karst region of China,to detailed analysis its temporal and spatial evolution characteristics by linear trend analysis and Empirical Orthogonal Function(EOF),further understanding the temporal and spatial evolution characteristics of soil moisture in karst areas of southwest China.The results show that, (1)There are obvious regional differences in the spatial size and distribution of the average mid-level soil moisture in the southwestern karst area have.(2)Analysising the seasonal average of mid-level soil moisture in 1991~2013,The soil moisture is the highest in autumn while it has the largest range of low values in Summer,it reflects the uniqueness of the soil in the southwestern karst region.(3).The interannual variation of mid-level soil moisture has obvious spatial distribution characteristics that"rising in South while reducing in North", the result of linear trend analysis and Empirical Orthogonal Function(EOF)also confirm this main feature.(4)The interannual variation of the mid-level soil moisture is relatively stable and the fluctuation trend is small, in general, soil moisture is highest in summer and autumn while lower in spring and winter. |
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| Keywords: | Karst Areas of Southwest China mid-level soil moisture spatial and temporal distribution Empirical Orthogonal Function(EOF) |
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