大气科学2013，Vol.37Issue(1)：1-13,13.DOI:10.3878/j.issn.1006-9895.2012.11048
土壤湿度年际变化对中国区域极端气候事件模拟的影响研究Ⅱ.敏感性试验分析
Impact of Interannual Soil Moisture Anomaly on Simulation of Extreme Climate Events in China.Part Ⅱ: Sensitivity Experiment Analysis
摘要
Abstract
Using NCAR Community Atmosphere Model (CAM 3.1), two numerical experiments are designed to explore the possible influence of the soil moisture anomaly on the simulation of extreme climate events. Results show that the simulated extreme climate events are sensitive to the soil moisture anomaly, and the anomaly has significant impacts on the climatology, interannual variability, and interannual variations of extreme climate events. Without the interannual anomaly of soil moisture included, the simulated Tn95p (warm nights), Tx95p (warm days), and HWDI (heat wave duration) significantly decrease in most areas of China, while FD (frost days) increases on the whole. It is also found that the response of the simulated precipitation extremes to the soil moisture anomaly exhibits significant spatial difference. The simulated P95p (the frequency of extreme heavy precipitation) obviously decreases in the Huaihe River basin, and R95p (the intensity of extreme heavy precipitation) also drops in the northeast of China but increases in the Yangtze River valley. Both the simulated RIO (number of days with precipitation greater than 10 mm) and CWD (the consecutive wet days) have experienced an evident drop in most areas of China. In addition, the interannual variability of the temperature extremes has decreased in most areas of China, but the situations of precipitation extremes are much complicated. Both the interannual variability of P95p and R95p decrease in North China and increase over the regions south of the Yangtze River. Throughout the whole country, the interannual variability of RIO and CWD decrease. Results also suggest that the performance of the model in simulating the interannual variations of the extreme climate indices, especially for Tn95p and FD, will become worse when the interannual anomaly of the soil moisture is removed.关键词
极端气候事件/数值模拟/土壤湿度/年际异常/敏感性试验分析Key words
Extreme climate, Numerical simulation, Soil moisture, Interannual anomaly, Sensitivity experiment analysis分类
天文与地球科学引用本文复制引用
陈海山,周晶..土壤湿度年际变化对中国区域极端气候事件模拟的影响研究Ⅱ.敏感性试验分析[J].大气科学,2013,37(1):1-13,13.基金项目
国家科技支撑计划课题2007BAC29B03,国家自然科学基金资助项目41075082、40905045,江苏省"333高层次人才培养工程"、"青蓝工程"和江苏高校优势学科建设工程资助项目PAPD （）
