不同类型和强度的东亚切断低压过程中UTLS区域臭氧变化对比分析  

Comparative Analysis of Ozone Variation in UTLS due to Different Types and Intensities of Cut-off Lows over East Asia

作　　者：周天娇 陈丹[1,2] 王咏青[1,2] 郭栋[1,2] ZHOU Tianjiao;CHEN Dan;WANG Yongqing;GUO Dong(Key Laboratory of Meteorological Disaster, Ministry of Education （KLME）/Joint International Research Laboratory of Climate and Environment Change （ILCEC）/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters （CIC-FEMD） , Nanjing University of lnformation Science ＆Technology, Nanjing 210044, Jiangsu, China;College of Atmospheric Sciences, Nanjing University of Information Science ＆ Technology, Nanjing 210044, Jiangsu, China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心,江苏南京210044 [2]南京信息工程大学大气科学学院,江苏南京210044

出　　处：《高原气象》2018年第3期837-849,共13页Plateau Meteorology

基　　金：国家自然科学基金项目(41675039;41305038;41575040);江苏省自然科学基金青年科学基金项目(BK20130994);高等学校博士学科点专项科研基金项目(20133228120003);江苏高校优势学科建设工程项目(PAPD);国家留学基金项目

摘　　要：利用ERA-Interim高分辨率臭氧资料和NCEP再分析资料,对比分析了不同类型(浅薄型和深厚型)、不同强度(针对深厚型)的东亚切断低压过程中伴随平流层空气入侵引起的上对流层-下平流层UTLS(Upper Troposphere-Low er Stratosphere)区域臭氧变化情况,结果表明:(1)深厚型和浅薄型切断低压过程中均出现了平流层臭氧入侵现象。在300 h Pa上,存在浅薄型切断低压引起的臭氧增量与深厚型切断低压相当的情况。在垂直分布上,深厚型个例臭氧浓度升高范围集中在对流层中上层至平流层下层区域,而浅薄个例中的臭氧浓度上升只集中发生在对流层中上层。(2)切断低压引起的UTLS区域臭氧浓度高值分布范围及臭氧含量大小与系统本身强度存在一定的联系。强度较强的深厚型切断低压过程中动力学对流层顶下降深度和入侵的臭氧浓度均远大于强度较弱的深厚型切断低压。(3)在选取11年臭氧平均值和11年当月臭氧平均值分别作为距平基准进行对比分析时发现,不同类型和强度的切断低压对比结果不受不同臭氧基准态选取的影响。The combinative ERA-Interim high resolution ozone reanalysis data and NCEP reanalysis data were used to comparatively analyze the variation of ozone in the UTLS （Upper Troposphere-Lower Stratosphere） caused by stratospheric intrusion during different types （＂ shallow＂ type and ＂deep＂ type） and different intensi- ties （ focus on ＂deep＂ type） of cut-off lows over East Asia. The results showed that the stratospheric ozone intru- sion occurs in all the ＂deep＂ and ＂ shallow＂ type of cut-off lows. The ozone increment in the ＂shallow＂ type of cut-off low is comparable to the ＂deep＂ type at 300 hPa. Therefore, in the process of the STE （ Stratosphere- Troposphere Exchange） during cut-off lows, the role of ＂shallow＂ type of cut-off lows can not be ignored. In the vertical distribution of ozone variation, due to the vertical structure of the cut-off lows, ozone increase mainly covers from upper troposphere to lower stratosphere in the ＂deep＂ type cases, while the ＂shallow＂ type cases concentrate on upper troposphere. In addition, the distribution patterns of the UTLS ozone imply that the value of ozone content and the range of high ozone content are related to the intensity of the system itself. The range of o- zone positive anomalies is larger and the increase of ozone concentration is higher in stronger ＂deep＂ type of cut- off lows than that of weaker cases at 300 hPa. In the ＂deep＂ type cut-off lows, the descending depth of dynami- cal tropopause and the ozone concentration of the intrusion in stronger cut-off lows are much larger than those of weaker cut-off lows. Meanwhile, the jet with different types of cut-off lows has the same intensity, while the vertical range of those with the ＂deep＂ type of cut-off lows is much larger. The ozone average of 11 years and the ozone average in the month that the systems happened of II years were used as standards of ozone anomalies for comparative analysis respectively. The results showed that the comparison resul

关 键 词：切断低压 UTLS区域 臭氧 平流层-对流层交换 

分 类 号：P401[天文地球—大气物理学与大气环境]