| 辽宁西部地区的气候变化及干湿状况年代际变化特征 |
| |
| 引用本文： | 孙凤华,吴志坚,李丽光.辽宁西部地区的气候变化及干湿状况年代际变化特征[J].中国沙漠,2006,26(6):969-975. |
| |
| 作者姓名： | 孙凤华 吴志坚 李丽光 |
| |
| 作者单位： | 1. 中国气象局,沈阳大气环境研究所,辽宁,沈阳,110016
2. 沈阳建材地质工程勘察院,辽宁,沈阳,110016 |
| |
| 基金项目： | 科技部社会公益研究项目;辽宁省自然科学基金 |
| |
| 摘 要： | 辽宁西部(简称辽西)是气候及生态环境脆弱区,因其特殊性使之成为相关科研人员关注的焦点,在全球气候变暖背景下增温显著的辽西地区气候及地表干湿气候界线如何变化是本文研究的问题。应用1961—2004年辽宁省内52个气象站的温度、降水、湿度、风、日照等气候资料,分析了辽西近50 a来的气候变化特点,采用改进的Penman模型计算潜在蒸发量,讨论了其时空代表性及分布特征；进一步计算了干燥度指数,并在10 a代际尺度上详细分析了辽西干湿气候变化特征。研究表明:辽西地区近44 a的总体气候变化趋势是气温升高、降水减少。20世纪60年代以来该区域干湿气候界线波动显著,呈现出整体移动、南北异相波动的特征。干湿气候年代际变化特征为60年代最湿润；70年代北部明显变干,南部不明显；80年代干湿气候存在一次突变,半干旱与半湿润界线明显东移,为最干期；90年代又跳跃性西移,明显变湿,尤其在北部表现更为显著,接近60年代。辽西的气候干湿年代际变化与西太平洋副热带高压和东南季风波动有较好的对应关系。
|
| 关 键 词： | 辽宁西部 气候变化 干湿状况 年代际波动 |
| 文章编号： | 1000-694X（2006）06-0969-07 |
| 收稿时间： | 2006-02-14 |
| 修稿时间： | 2006-05-19 |
Climate Change and Inter-decadal Fluctuation of Dry and Wet Climate in Western Liaoning Province |
| |
| SUN Feng-hua,WU Zhi-jian,LI Li-guang.Climate Change and Inter-decadal Fluctuation of Dry and Wet Climate in Western Liaoning Province[J].Journal of Desert Research,2006,26(6):969-975. |
| |
| Authors: | SUN Feng-hua WU Zhi-jian LI Li-guang |
| |
| Institution: | 1.Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China; 2.Shenyang Institute of Exploration for Construct Material &; Geology Engineering, Shenyang 110016, China |
| |
| Abstract: | Western Liaoning Province is the frailty area of ecological environment and climate,which made it the hotspot.In this paper we have studied the changes on climate of western Liaoning Province and the dry-wet climate boundary shifting under the background of global warming.Based on the temperature,precipitation,humidity,wind,and solar radiation data of the 52 stations in Liaoning Province during 1961-2004,the potential evapotranspiration was calculated using the integrated Penman formula,and its temporal and spatial distribution was discussed.Furthermore,we have calculated the aridity index and analyzed the inter-decadal fluctuation of dry and wet climate.The results show that the climate boundary of dry and wet fluctuated markedly and differentiated greatly in this area over the past 44 years.The dry and wet climate had changed abruptly in 1990's.The boundary between semi-humid and humid moved towards East,but the boundary between semi-arid and semi-humid moved towards West.The dimensions of semi-arid and humid were shortened,and the dimensions of semi-humid were enlarged obviously.The status of dry and wet climate in the west of Liaoning Province was mainly controlled by West Pacific Subtropical High and Southeast Monsoon,whereas that in the east controlled by either these or the topography precipitation. |
| |
| Keywords: | western Liaoning Province climate change dry and wet condition inter-decadal fluctuation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国沙漠》浏览原始摘要信息 |
| 点击此处可从《中国沙漠》下载免费的PDF全文 |
|
