| 青藏高原冬春季地温异常对长江中下游夏季旱涝影响的研究 |
| |
| 引用本文： | 周玉淑,高守亭,邓国,徐祥德.青藏高原冬春季地温异常对长江中下游夏季旱涝影响的研究[J].南京气象学院学报,2002,25(5):611-619. |
| |
| 作者姓名： | 周玉淑 高守亭 邓国 徐祥德 |
| |
| 作者单位： | 1. 中国科学院,大气物理研究所,大气边界层物理和大气化学国家重点实验室,北京,100029
2. 中国气象科学研究院,北京,100081 |
| |
| 基金项目： | 国家自然基金项目 40 175 0 17，国家自然基金项目 40 0 35 0 10 |
| |
| 摘 要： | 探讨了青藏高原地温异常对长江中下游地区降水的影响。通过资料分析揭示：长江中下游地区夏季旱涝前期冬春青藏高原各层次的地温距平具有反位相分布和高方差分布的特征，前期冬、春季青藏高原地温的三维结构对长江中下游地区夏季降水异常具有“强信号”指示特征。从地面0cm到地下3．2m的地温距平分布为：涝年高原偏南部为正，中部和北部为负，旱年时则与此相反，高原中部和东南部是反位相最明显的地区。地温距平在近地表变化较快，地温距平的大值区在40cm层到1．6m层之间，1．6m到3．2m层地温距平变化较慢。资料分析表明前期青藏高原不同层次地温异常是后期长江中下游地区降水异常的一个重要原因。资料分析和数值试验都揭示了北半球环流型对青藏高原不同层次地温异常可能产生遥相关波形并形成季尺度低频波，此相关波列的激发和传播可能影响长江中下游地区后期的降水。
|
| 关 键 词： | 青藏高原 地温 长江中下游地区 旱涝 冬季 春季 |
| 文章编号： | 1000-2022(2002)05-0611-09 |
| 修稿时间： | 2001年11月20 |
Effect of the Winter/Spring Soil Temperature of the Tibetan Plateau on the Summer Precipitation over the Mid-Lower Reaches of the Yangtze River |
| |
| ZHOU Yu-shu ,GAO Shou-ting ,DENG Guo ,XU Xiang-de.Effect of the Winter/Spring Soil Temperature of the Tibetan Plateau on the Summer Precipitation over the Mid-Lower Reaches of the Yangtze River[J].Journal of Nanjing Institute of Meteorology,2002,25(5):611-619. |
| |
| Authors: | ZHOU Yu-shu GAO Shou-ting DENG Guo XU Xiang-de |
| |
| Institution: | ZHOU Yu-shu 1,GAO Shou-ting 1,DENG Guo 1,XU Xiang-de 2 |
| |
| Abstract: | The relationship between the precipitation of the mid-lower reaches of the Yangtze River(MRYR) in summer with the soil temperature of the Tibetan Plateau(TP) in previous winter and spring is investigated. Data analyses show that the soil temperature abnormality affects the drought and flood in MRYR on seasonal scale,and there is obvious correlation between the soil temperature of TP and the precipitation in MRYR. The soil temperature anomaly of TP in the previous winter and spring is positive on the south of TP and negative on the mid-north in flood years, in contrast,the anomaly is positive in the mid-north and negative in the south in drought years. The distinct anomaly of soil temperature lies the layer between 40cm and 1.6m under the ground surface. Both data analyses and model simulations suggest that the general circulation in the north hemisphere may produce teleconnection and form the low frequency wave propagation on seasonal scale in response to the thermal abnormality of TP,thus,affecting the subsequent summer precipitation in MRYR. These processes may imply that the teleconnection dynamical mechanism is one reason for formation of regional drought and flood. |
| |
| Keywords: | Tibetan Plateau soil temperature mid-lower reaches of the Yangtze River drought and flood |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
