| 四川盆地土壤湿度时空分布及影响因子分析 |
| |
| 引用本文： | 陈东东,廖捷,陈功,等.四川盆地土壤湿度时空分布及影响因子分析[J].高原山地气象研究,2016,36(4):36-41. |
| |
| 作者姓名： | 陈东东 廖捷 陈功 等 |
| |
| 作者单位： | 1. 中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室, 成都 610072; |
| |
| 基金项目： | 四川盆地土壤湿度变化与成因分析(川气课题,2013-青年-06)；四川农田土壤墒情监测及预报技术的示范应用(项目计划编号:15010107) |
| |
| 摘 要： | 基于四川盆地24个农业气象站1996~2012年浅层10cm的旬土壤湿度、温度、降水和日照等观测资料,采用统计分析方法,分析了盆地四季多年土壤湿度时空分布特征以及气象因子对土壤湿度的影响。结果表明:四川盆地浅层土壤湿度空间分布整体呈现南多北少的态势,其大小为春、冬两季偏低;夏、秋相对较高,其中以秋季为一年内最高。时间变化趋势则表现为春夏有微弱的降低趋势,而秋冬呈现微弱上升趋势。小波分析表明,各季节普遍存在4~6年的准周期。从倾向率分析来看,在不同季节表现出减少的区域主要集中在南部及东北部地区,四川盆地其余各地呈现不同程度增加趋势,以绵阳地区变化较为显著,夏、秋两季均达到了1.4%/a。与气象因子相关分析中得出,在相对偏干的盆地西北部,浅层土壤湿度变化受降水的影响最大,而在较为湿润的南部和东北部受日照影响最大。
|
| 关 键 词： | 土壤湿度 小波分析 时空分布 倾向率 |
| 收稿时间： | 2016-09-28 |
Spatial and Temporal Distribution of Soil Moisture and Its Influence Factor Analysis in Sichuan Basin |
| |
| Institution: | 1. Institute of Plateau Meteorology, China Meteorological Administration/Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China;2. Sichuan Provincial Agricultural Meteorological Centre, Chengdu 610072, China |
| |
| Abstract: | This paper analyzed the seasonal spatial and temporal distribution characteristics of soil moisture and the effect of meteorological factors on it based on 10 cm meadow soil relative humidity,temperature precipitation and sunshine from agro-meteorological stations during the period 1996 ~ 2012 of the Basin region by statistical methods. The spatial distribution of shallow soil moisture was higher in south Sichuan Basin than that in north,and was higher in summer and autumn than that in spring and winter,especially highest in autumn. The temporal distribution of soil moisture was a weak decreasing trend in spring and summer,and an opposite in autumn and winter. There was a 4 ~ 6 year quasi-periodic in each season by Wavelet analysis. Soil moisture was reduced in south and northeast Sichuan Basin in seasons by climate tendency rate,which in other areas showed an increase trend. In Mianyang,soil moisture was significantly changed by climate change,and was 1. 4%/a in summer and autumn.Precipitation was greatest impact on shallow soil moisture in northwest Sichuan Basin where was more dry. However,in humid areas such as south Sichuan Basin and northeast Sichuan Basin,sunshine was the most factor impact on shallow soil moisture. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《高原山地气象研究》浏览原始摘要信息 |
| 点击此处可从《高原山地气象研究》下载免费的PDF全文 |
|
