刘刚,徐士琦. 2019. 夏季亚洲阻塞高压识别及其对东北气候异常的可能影响:不同再分析资料对比[J]. 气象学报, (0):-, doi:10.11676/qxxb2019.007
夏季亚洲阻塞高压识别及其对东北气候异常的可能影响:不同再分析资料对比
Recognition Results of Blocking High in Asia during summer and Its Possible Impacts on Climate Anomalies in Northeast China: Comparison of Various Reanalysis Data.
投稿时间:2017-11-17  修订日期:2018-05-24
DOI:10.11676/qxxb2019.007
中文关键词:  阻高,客观识别,资料对比,东北
英文关键词:blocking high, objective identification, data comparison, northeast
基金项目:国家自然科学基金(41741021,41405094, 41630424, 41530531),中国气象局气候变化专项(CCSF201833)资助
作者单位E-mail
刘刚 吉林省气象科学研究所 loverdream1999lg@126.com 
徐士琦 吉林省气候中心 xushiqi91@163.com 
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中文摘要:
      基于阻塞高压客观识别方法,利用1979-2016年夏季(6-8月)NCEP-I、NCEP-II逐日再分析资料和ERA-interim逐6h再分析资料对识别结果进行对比分析;并以D类(130-160°E)阻高为例,讨论其对6月我国东北地区气候的可能影响。结果表明:NCEP-I和NCEP-II再分析资料对阻高活动天数、发生频次及年代际变化的识别结果差异较小,而ERA-interim与前两种资料的结果差别较大。三种再分析资料下,夏季各类阻高活动天数均与500hPa高度场存在相应的显著相关区,且形态相近。但前两种资料对于各类阻高的表征结果较为一致,而ERA-interim再分析资料对各类阻高面积和范围的表征偏小。6月D类阻高活动日数与东北地区气温和降水关系密切,D类阻高活跃年,大气环流以经向型为主,东北地区低层低温、暖平流,高层高温、冷平流的结构指示大气层结不稳定,且东北上空为异常低压环流控制,上升气流较强,有利于6月东北地区出现低温多雨天气。鄂霍次克海地区是6月Rossby波的重要来源地之一,而6月D类阻高的形成可能与海陆温差有关。
英文摘要:
      Based on the blocking high objective identification method, the identification results are compared by using the daily reanalysis data of NCEP/NCAR-I, NCEP-II and the 6h reanalysis data of ERA-interim in summer (June to August) for the period 1979-2016. Taking the type D blocking high as an example, we discuss its possible impacts on the climate in Northeast China during June. Results suggest that, the reanalysis data of NCEP-I and NCEP-II show little differences in identifying the numbers of days, frequencies of occurrences, and interdecadal variations of blocking high, while ERA-interim reanalysis data has a great difference with the former two kinds of data. Under the three kinds of reanalysis data, there are significant correlation areas between the various types of blocking high activity days and the height field of 500hPa in summer, and the patterns are similar. However, the characterization results of the first two kinds of data for various types of blocking high are relatively consistent, and the ERA-interim reanalysis data is smaller in the characterization of the area and range of blocking high. The cumulative days of type D blocking high in June are closely related to the temperature and precipitation in Northeast China, the active (inactive) years of type D blocking high correspond to low (high) temperature and more (less) rain in Northeast China. The Okhotsk Sea area is an important source of Rossby wave in June, and the formation of type D blocking high in June may be related to the temperature difference between the sea and the land.
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