【作者】 蔡新玲；

【导师】 王盘兴；

【作者基本信息】 南京气象学院 ， 气象学， 2003， 硕士

【摘要】 本文详细介绍了局地型相似系数(LPAC)的定义及制作局地型相似系数图的方法。利用NCEP／NCAR再分析高度场和风场资料，计算了30°s～75°N球带区域1957年12月至1997年12月逐月850、500 hPa风场及850、500、150、30 hPa高度场月际局地型相似系数图、多年平均图(即气候LPAC图)、年际异常图及均方差图，在此基础上，分析了北半球平均环流季节转换及其异常的规律。分析表明，气候局地型相似系数图较好地给出了大尺度环流季节转换发生的过程：在对流层中、下部，风、压场月际局地型相似系数图清楚地反映了夏季型环流建立由南向北的推进过程；低平流层夏季型环流的建立与对流层接近，其中，南亚高压上高原过程有明显反映：中平流层，夏季型环流的建立明显表现为从中、高纬度开始，逐步向低纬传播的特征，且变化较对流层和低平流层明显。此外，论文还用气候LPAC图和异常LPAC图对1980和1991年异常的特征作了初步分析。更多还原

【Abstract】 The definition of map of the Local Pattern Analogue Coefficient (LPAC) and its facture method are introduced detailedly in this paper. By using NCEP/NCAR reanalysis data of height and wind, The inter-monthly LPAC map , the climate LAPC map ,inter-annual anomaly map and mean variance map of monthly wind field of 850 and 500hPa and monthly height field of 850, 500, 150, 30hPa are calculated in a globe-belt area, which situates between 30° S and 75° N , from December 1957 to December 1997, according them we analysis the rule of the season transfer and anomaly of NH mean circulation .The results show that the climate map of LAPC can describe the seasonal transfer process of large scale circulation better .the advance process of summer circulation establish is form south to north at the middle and lower level of the troposphere, that is reflected primly in the inter-monthly wind and pressure map of LAPC; at lower lever of stratosphere, the establish process is simulate to that of troposphere, and reflect of process of that the South Asia High toward plateau; at middle stratosphere the summer circulation establish begins at middle and high latitude initially, and then transmits to low latitude gradually, while the seasonal variability in mid-stratosphere is stronger than it in troposphere and low-stratosphere. In addition, this paper primarily analysis the anomaly characteristic of 1980 and 1991 using the climate and anomaly map of LAPC.更多还原