设为首页
加入收藏
1998年二度梅雨期西太平洋副热带高压活动的诊断分析
A Diagnostic Analysis of Activities of the Western Pacific Subtropical High During the Second Meiyu Period in 1998
-
摘要: 文章对1998年长江流域二度梅雨期西太平洋副热带高压的活动与大气经圈环流的关系进行了分析。结果指出，副高的进退与经圈环流的调整有着密切的关系。副高的北跳并不是由与其相联系的反环流下沉支直接北移所引起的。低纬度深厚上升运动的发展不利于副高维持在较低的纬度，而中纬度反环流的突然向南调整则有利于副高在更北的纬度建立，于是副高出现突然北跳的现象。它是江淮地区出梅的一种经圈环流调整形式。副高在稳定期间，随着与它相联系的反环流的南北运动而作相应的南北运动。副高在南退之前，对流层顶附近有反环流生成，然后迅速向南运动，副高也随之迅速南退。Abstract: The relationship between atmospheric meridional circulation and activities of the Western Pacific Subtropical High during the second Meiyu period in 1998 over the Yangtze River is analyzed. The results show that the advance and retreat of the Western Pacific Subtropical High are closely connected with the variation of the meridional circulation. The northward jump of the Western Pacific Subtropical High is not directly caused by the northward movement of the descending branch of the counter-circulation, which is connected with the Western Pacific Subtropical High. The development of the deep ascending motion at the lower latitudes obstructs the maintaining of the Western Pacific Subtropical High in the lower latitudes. Whereas, the sudden southward movement of the counter-circulation at the middle latitudes is in favor of the buildup of the Western Pacific Subtropical High in the farther north latitudes. Then, the Western Pacific Subtropical High jumps northward abruptly. This is form of the re-adjustment of the meridional circulation that ends Meiyu in the Yangtze-Huai River Region. The Western Pacific Subtropical High moves northward or southward along with the connected counter-circulation while remaining steady. Before the Western Pacific Subtropical High retreats from north, a new counter-circulation originates near the tropopause. When the new counter-circulation moves south rapidly, the Western Pacific Subtropical High moves south along with it.
-
[1] 陶诗言, 朱福康.夏季亚洲南部100 hPa流型的变化及其与西太平洋副热带高压进退的关系.气象学报, 1964, 34: 385~395. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB196404000.htm [2] 叶笃正, 杨广基, 王兴东.东亚和太平洋上空平均垂直环流 (一) 夏季.大气科学, 1979, 3(1): 1~11. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK197901000.htm [3] 何金海, 周兵, 温敏, 等.关于西太平洋副热带高压的垂直环流结构和年际变动特征及其机制研究.暴雨*灾害, 2000, 4(1): 24~35. http://www.cnki.com.cn/Article/CJFDTOTAL-DQJZ200104002.htm [4] 吴国雄, 刘屹岷, 刘平.空间非均匀加热对副热带高压带形成和变异的影响Ⅰ:尺度分析.气象学报, 1999, 57(3): 257~263. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB903.000.htm [5] 刘屹岷, 刘辉, 刘平, 等.空间非均匀加热对副热带高压带形成和变异的影响Ⅱ:陆面感热与东太平洋高压.气象学报, 1999, 57(4):385-396. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB903.000.htm [6] 李双林, 张道明, 纪立人, 等.副高北进过程的个例数值研究.大气科学, 1999, 23(3): 296~307. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK199903004.htm [7] 袁恩国, 谭同量, 李云林.1958.年8月4-12日期间副热带高压减退过程的研究.气象学报, 1964, 34(2):162-173. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB196402003.htm [8] 袁恩国.夏季经圈环流的调整和西太平洋副热带高压活动的关系.大气科学, 1981, 5(1): 60~68. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK198101006.htm [9] 朱乾根, 林锦瑞, 寿绍文.天气学原理和方法.北京:气象出版社, 1981. -
下载:
图(10)
计量
- 摘要浏览量: 3057
- HTML全文浏览量: 525
- PDF下载量: 1511
- 被引次数: 0
