| 厄尔尼诺/拉尼娜事件对青海湖周边地区气候的影响 |
| |
| 引用本文： | 张慧慧,赵景波.厄尔尼诺/拉尼娜事件对青海湖周边地区气候的影响[J].水土保持通报,2013,33(1):146-151. |
| |
| 作者姓名： | 张慧慧 赵景波 |
| |
| 作者单位： | 1. 陕西师范大学旅游与环境学院,陕西西安,710062
2. 陕西师范大学旅游与环境学院,陕西西安710062;中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710075 |
| |
| 基金项目： | 国家科技支撑计划项目“青海湖流域生态和环境综合检测与评估技术”(2007BAC30B01) |
| |
| 摘 要： | 根据1961年来青海湖周边地区的气温和降水量资料,结合小波分析和ENSO事件的发生与变化,研究了1961年来青海湖周边气温与降水的变化趋势,以及厄尔尼诺/拉尼娜事件对该区气温、降水量以及旱涝灾害的影响.结果表明,1961年来青海湖周边地区的年降水量呈波动上升趋势,西部最显著,年降水量以8.73 mm/10 a的速率增加.该地区的年平均气温呈波动上升趋势,平均气温增温率接近或明显高于全国平均水平.1988-2010年多年平均气温比1961-1987年增加更显著.小波分析显示,青海湖周边地区降水变化周期约为3,7和17a,气温变化的周期约为3,7和29 a.不同研究区域的降水量和气温变化与ENSO事件相关性不同.研究数据表明,青海湖周边地区厄尔尼诺年发生涝灾多于旱灾,而拉尼娜年多发生旱灾.1961-2009年青海湖水位总体趋势在下降,2005年后出现回升,流域降水量对湖水位的年变化有显著影响.
|
| 关 键 词： | 厄尔尼诺/拉尼娜 气温 降水量 旱涝灾害 青海湖周边地区 水位 |
| 收稿时间： | 2012/2/20 0:00:00 |
| 修稿时间： | 2012/3/28 0:00:00 |
Effects of El Nino/La Nina Events on Climate in Qinghai Lake and Its Surrounding Areas |
| |
| ZHANG Hui-hui and ZHAO Jing-bo.Effects of El Nino/La Nina Events on Climate in Qinghai Lake and Its Surrounding Areas[J].Bulletin of Soil and Water Conservation,2013,33(1):146-151. |
| |
| Authors: | ZHANG Hui-hui and ZHAO Jing-bo |
| |
| Institution: | 1,2(1.College of Tourism and Environment,Shaanxi Normal University,Xi′an,Shaanxi 710062,China; 2.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,CAS,Xi′an,Shaanxi 710075,China) |
| |
| Abstract: | The trends and periodic changes of temperature and precipitation processes in the Qinghai Lake periphery are analyzed based on temperature and precipitation data since 1961and combined with wavelet analysis and the El Nino/La Nina events.The effects of the El Nino/La Nina events on temperature,precipitationand droughts and floods are investigated as well.Results showed that the annual precipitation was increasing,most notably in the west,and the annual precipitation was increasing at a speed of 8.73mm/10a.Moreover,the annual temperature was increasing.The mean temperature warming rates were close to or abovethe national average.Bounded by 1987,the average temperature during 1988-2010was significantly higherthan that during 1961-1981.The tests on wavelet periodic changes indicated that the periods of annual precipitation in the Qinghai Lake periphery were about 3,7and 17years and those of annual temperature wereabout 3,7and 29years.The correlations between ENSO events and precipitation and temperature were different in different regions.Floods occurred easily in the El Nino years,while droughts occurred easily in theLa Nina years.The lake level was decreasing,but it has rebounded since 2005.The precipitation had a significant impact on the water level. |
| |
| Keywords: | El Nino/La Nina temperature precipitation drought and flood Qinghai Lake periphery water level |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《水土保持通报》浏览原始摘要信息 |
| 点击此处可从《水土保持通报》下载免费的PDF全文 |
|
