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Retrievals of over-ocean precipitable water from SSM/I by SOM network model

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Chinese Science Bulletin 1999年第11期44卷 1038-1041页

作者： jianchun bian Hongbin Chen Peicai Yang Daren Lu Peking Univ Dept Geophys Beijing 100871 Peoples R China Chinese Acad Sci Inst Atmospher Phys LAGEO Beijing 100029 Peoples R China

An SOM network model was developed for retrievals of the oceanic total precipitable water (PW) from the SSM/I, by using the SSM/I and radiosonde observation data set provided by the NASDA (Japan). The model was first trained by 5/6 of the data, and the other data were used to test the retrieval ability of the model. The retrieval results showed that the SOM network model was better than the routine operational algorithm.

关键词： SOM network SSM/I precipitable water.

The Impact of Cut-off Lows on Ozone in the Upper Troposphere and Lower Stratosphere over Changchun from Ozonesonde Observations

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Advances in Atmospheric Sciences 2016年第2期33卷 135-150页

作者： Yushan SONG Daren LU Qian LI jianchun bian Xue WU Dan LI Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 University of Chinese Academy of Sciences Beijing 100049

In situ measurements of the vertical structure of ozone were made in Changchun （43.53°N, 125.13°E）, China, by the Institute of Atmosphere Physics, in the summers of 2010-13. Analysis of the 89 validated ozone profiles shows the vari- ation of ozone concentration in the upper troposphere and lower stratosphere （UTLS） caused by cut-off lows （COLs） over Changchun. During the COL events, an increase of the ozone concentration and a lower height of the tropopause are observed. Backward simulations with a trajectory model show that the ozone-rich airmass brought by the COL is from Siberia. A case study proves that stratosphere-troposphere exchange （STE） occurs in the COL. The ozone-rich air mass transported from the stratosphere to the troposphere first becomes unstable, then loses its high ozone concentration. This process usually happens during the decay stage of COLs. In order to understand the influence of COLs on the ozone in the UTLS, statistical analysis of the ozone profiles within COLs, and other profiles, are employed. The results indicate that the ozone concentrations of the in-COL profiles are significantly higher than those of the other profiles between ±4 km around the tropopause. The COLs induce an increase in UTLS column ozone by 32% on average. Meanwhile, the COLs depress the lapse-rate tropopause （LRT）/dynamical tropopause height by 1.4/1.7 km and cause the atmosphere above the tropopause to be less stable. The influence of COLs is durable because the increased ozone concentration lasts at least one day after the COL has passed over Changchun. Furthermore, the relative coefficient between LRT height and lower stratosphere （LS） column ozone is -0.62, which implies a positive correlation between COL strength and LS ozone concentration.

关键词： ozonesonde cut-off low upper troposphere lower stratosphere tropopause

Workshop on Dynamics, Transport and Chemistry of the UTLS Asian Monsoon

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Advances in Atmospheric Sciences 2016年第9期33卷 1096-1098页

作者： William J.RANDEL Laura L.PAN jianchun bian National Center for Atmospheric Research Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences

1. Overview The upper troposphere-lower stratosphere （UTLS） of the Asian summer monsoon （ASM） region is characterized by a continental-scale anticyclonic circulation, which is dynami- cally active and coupled to monsoonal convection. The monsoon anticyclone exhibits anomalous chemical and aerosol characteristics, linked to the outflow of deep convection and the large-scale circulation, and strongly influences the global UTLS composition during boreal summer.

关键词： Transport and Chemistry of the UTLS Asian Monsoon Workshop on Dynamics ASM

Ozone mini-hole occurring over the Tibetan Plateau in December 2003

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Chinese Science Bulletin 2006年第7期51卷 885-888页

作者： bian jianchun WANG Gengchen CHEN Hongbin QI Donglin LUE Daren ZHOU Xiuji LAGEO Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Qinghai Meteorological Bureau Xining 810001 China Chinese Academy of Meteorological Sciences Beijing 100081 China

By analyzing the total ozone data from TOMS and ground-based observations, it is found that a large area with extremely low ozone occurred over the Tibetan Plateau during December 14-17, 2003. After correcting the bias in TOMS data, the area with the total ozone < 220 DU is found to be over 2500000 km2, and the minimum value is only 190 DU. It is the first time that an ozone mini-hole or an extremely low ozone event is found to occur over the Tibetan Plateau.

关键词：西藏高原臭氧环境保护 TOMS数据地面观察

东北冷涡引起的对流输送过程个例分析和数值模拟

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地球物理学报 2018年第9期61卷 3607-3616页

作者：李丹卞建春中国科学院大气物理研究所中层大气和全球环境探测重点实验室北京100029 中国科学院大学地球科学学院北京100049

平流层-对流层物质交换是影响全球大气成分收支的重要过程.过去的研究认为大尺度的交换过程在平流层-对流层物质交换中最为重要,但是近些年的研究表明,中小尺度过程对平流层-对流层物质交换也有重要贡献.本文利用OMI和MLS数据、ERA-Inte... 详细信息

平流层-对流层物质交换是影响全球大气成分收支的重要过程.过去的研究认为大尺度的交换过程在平流层-对流层物质交换中最为重要,但是近些年的研究表明,中小尺度过程对平流层-对流层物质交换也有重要贡献.本文利用OMI和MLS数据、ERA-Interim再分析资料,结合中尺度WRF模式综合分析了东北地区发生在冷涡前部和冷涡后部的两次强对流天气过程.结果表明:发生在冷涡前部暖锋云系中的强对流持续时间长,对流垂直尺度小,下平流层静力稳定度高;发生在冷涡后部的孤立强对流持续时间短,水平尺度较小,且在对流层顶附近,静力稳定度小,对流可穿出热力学对流层顶.从示踪物分布情况来看,两次强对流都可将示踪物输送到对流层顶附近,但是冷涡前部对流可将示踪物从边界层输送到整个对流层,而孤立对流是把示踪物输送到对流层顶,而不与自由对流层空气发生混合.

关键词：平流层-对流层物质交换东北冷涡对流输送 WRF模式

葛根素对镉致大鼠大脑皮质线粒体损伤的保护效应

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中国兽医科学 2024年第4期54卷 560-565页

作者：黄心昱徐明畅张文华邹辉顾建红刘学忠卞建春刘宗平袁燕扬州大学兽医学院江苏扬州225009 江苏高校动物重要疫病与人兽共患病防控协同创新中心江苏扬州225009

为了探究葛根素对镉(Cd)致大鼠大脑皮质线粒体损伤的保护效应,将24只SD大鼠随机分为对照组(Con)、葛根素组(Pur)、镉组(Cd)、镉与葛根素共处理组(Cd+Pur)。Pur组、Cd+Pur组大鼠每日以每千克体重200 mg葛根素(溶解于羧甲基纤维素钠)灌胃,... 详细信息

为了探究葛根素对镉(Cd)致大鼠大脑皮质线粒体损伤的保护效应,将24只SD大鼠随机分为对照组(Con)、葛根素组(Pur)、镉组(Cd)、镉与葛根素共处理组(Cd+Pur)。Pur组、Cd+Pur组大鼠每日以每千克体重200 mg葛根素(溶解于羧甲基纤维素钠)灌胃,Con组、Cd组大鼠每日用相同剂量羧甲基纤维素钠灌胃,持续7周。从第4周开始,Cd组、Cd+Pur组大鼠在灌胃的同时自由饮用75 mg/L镉水溶液,持续4周。试验结束后,剖杀采集大鼠大脑皮质,火焰原子吸收光谱法检测镉含量,化学发光法检测ATP水平,比色法检测NAD^(+)/NADH比率、Mn SOD活性和H_(2)O_(2)水平,实时荧光定量PCR法检测线粒体氧化应激相关基因(GST、CAT、Gpx、UCP1、UCP2和UCP3)转录水平。结果显示,与Con组相比,Cd组大鼠大脑皮质镉含量、H_(2)O_(2)水平、线粒体氧化应激相关基因转录水平显著上升(P0.05),MnSOD活性显著上升(P0.05)。结果表明,葛根素可降低镉暴露大鼠大脑皮质镉含量,同时葛根素通过缓解线粒体功能障碍、线粒体氧化应激减轻了镉致大鼠大脑皮质线粒体损伤。

关键词：镉葛根素大鼠大脑皮质线粒体损伤

Statistics of cloud heights over the Tibetan Plateau and its surrounding region derived from CloudSat data

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Research in Cold and Arid Regions 2016年第1期8卷 72-81页

作者： ShengJie Wang WenYing He HongBin Chen jianchun bian ZhenHui Wang China Meteorological Administration Beijing 100081China LAGEO Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Nanjing University of Information Science&Technology NanjingJiangsu 210044China

Cloud-radiation interaction has a large impact on the Earth＇s weather and climate change, and clouds with different heights cause different radiative forcing. Thus, the information on the statistics of cloud height and its variation in space and time is very important to global climate change studies. In this paper, cloud top height （CTH）, cloud base height （CBH） and cloud thickness over regions of the Tibetan Plateau, south slope of the plateau and South Asian Monsoon are analyzed based on CloudSat data during the period from June 2006 to December 2007. The results show that frequency of CTH and CBH in unit area over the studied regions have certain temporal-spatial continuity. The CTH and CBH of different cloud types have different variation scopes, and their seasonal variations are distinct. Cloud thickness is large （small） in summer （winter）, and the percentages of different cloud types also have certain regularity.

关键词： CloudSat Tibetan Plateau cloud height cloud thickness

Preface to Special Issue on the National Report to the IUGG Centennial by CNC-IAMAS(2011–2018)

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Advances in Atmospheric Sciences 2019年第9期36卷 885-885页

作者： Daren Lü jianchun bian Chinese National Committee for IAMAS

The 27th General Assembly of the International Union of Geodesy and Geophysics(IUGG),which also marks the 100th anniversary of IUGG,will be held during 8–18 July 2019 in Montr′eal,*** Chinese National Committee(CNC)for the International Association of Meteorology and Atmospheric Sciences(IAMAS)has a more than 30-year tradition of submitting national reports to the IUGG General Assembly every four *** 2004,CNC-IAMAS has published its progress report as a special issue in Advances in Atmospheric *** special issues comprising invited reviews written by leading Chinese scientists,published in 2004,2007 and 2012 respectively,have received wide attention and are highly cited.

关键词： IUGG reviews eal has its be

Advances in the Researches of the Middle and Upper Atmosphere in China in 2014-2016

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空间科学学报 2016年第5期36卷 738-752页

作者： CHEN Zeyu XU Jiyao HU Xiong CHEN Hongbin CHEN Wen WEI Ke bian jianchun TIAN Wenshou ZHANG Shaodong REN Rongcai DOU Xiankang Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 National Space Science Center Chinese Academy of Sciences Beijing 100190 Institute of Atmospheric Physics Chinese Academy of Scienees Beijing 100029 School of Atmospheric Sciences Lanzhou University Lanzhou 730000 School of Electronic Information Wuhan University Wuhan 430072 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 School of Earth and Space Sciences University of Science and Technology of China Hefei 230026

In this report the research results by Chinese scientists in 2014—2016 are *** focuses are placed on the researches of the middle and upper atmosphere,specifically the researches associated with ground-based observation capabihty development,dynamical processes,and properties of circulation and chemistry-climate coupling of the middle atmospheric layers.

关键词：中高层大气中国科学家研究成果观察能力耦合特性大气化学中间层气候