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Possible mechanism of the effect of convec{1. over Asian-Australian “land bridge” on the East Asian summer monsoon onset

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science{1. Earth sciences 2006年第11期49卷 1223-1232页

作者： he jinhai1, wen min2, ding yihui3 & zhang renhe2 1. jiangsu key laboratory of meteorological disaster (KLME), nanjing institute of meteorology, nanjing university of informa- tion science and technology, nanjing 21004., china 2. State key laboratory of Severe Weather (LaSW), Chinese Academy of meteorological sciences, Beijing 100081, china 3. National Climate Center, Chinese meteorological Administration, Beijing 100081, china jiangsu {1. laboratory of meteorological disaster (KLME) Nanjing Institute of Meteorology Nanjing University of Information Science and Technology Nanjing China State key {1. of Severe Weather (LaSW) Chinese Academy of Meteorological Sciences Beijing China National Climate Center Chinese Meteorological Administration Beijing China

The Asian-Australian “land bridge” is an area with the most vigorous convection in Asian monsoon region in boreal spring, where the onset and march of convection are well associated with the onset of East Asian summer monsoon. The convection occurs over Indo-china Peninsula as early as mid-April, which exerts critical impact on the evolution of monsoon circulation. Before mid-April there are primarily sensible heatings to the atmosphere over Indo-china Peninsula and Indian Peninsula, so the apparent heating ratios over them decrease with height. However, after mid-April it changes into latent heating over Indo-china Peninsula due to the onset of convection, and the apparent heating ratio increases with height in mid- and lower troposphere. The vertical distribution of heating ratio and its differences between Indo-china Peninsula and Indian Peninsula are the key factors leading to the splitting of boreal subtropical high belt over the Bay of Bengal. Such mechanism is strongly supported by the fact that the evolution of the vertical heating ratio gradient above Indo-china Peninsula leads that of 850 hPa vorticity over the Bay of Bengal. Convections over Indo-china Peninsula and its surrounding areas further increase after the splitting. Since then, there is a positive feedback lying among the convective heating, the eastward retreat of the subtropical high and the march of monsoon, which is a possible mechanism of the advance of summer monsoon and convection from Indo-china Peninsula to South{61. Sea.

关键词： Asian-Australian 'land bridge', tropical convection, Indo-china Peninsula, the splitting of boreal subtropical high belt, East Asian summer monsoon onset.

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Impacts of intraseasonal oscillation on t{1. onset and interannual variation of t{1. Indian summer monsoon

Impacts of intraseasonal oscillation on the onset and intera...

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“201.年北京气象学会中青年优秀论文评选”学术研讨会

作者： QI YanJun~(1,2,3),zhang renhe~(2+),LI Tim~4 & wen min~2 1 institute of Atmospheric Physics,Chinese Academy of sciences,Beijing 100029,china 2 State key laboratory of Severe Weather,Chinese Academy of meteorological sciences,Beijing 100081,china 3 Graduate university of the Chinese Academy of sciences,Beijing 100049,china 4 International Pacific Research Center and Department of meteorology,university of Hawaii at Manoa,Honolulu 96816,HI,USA

The role of the intraseasonal oscillation(ISO) on the seasonal and interannual variations of the Indian summer monsoon is investigated based on the analysis of observational *** is shown that the ISO significantly contributes to the establishment of low-level westerlies during the monsoon onset and developing *** effect of the ISO on the annual cycle of the monsoon is through nonlinear eddy momentum *** the interannual timescale,the Indian summer monsoon rainfall exhibits a significant out-of-phase relationship with the ISO intensity over the Indian monsoon *** strong ISO years it appears the weak monsoon when there is an abnormal high over the India subcontinent in the lower *** weak ISO years there exists an abnormal low and the strong monsoon appears.

关键词： intraseasonal oscillation(ISO) Indian summer monsoon interannual variation

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Impacts of intraseasonal oscillation on t{1. onset and interannual variation of t{1. Indian summer monsoon

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Chinese science Bulletin 2009年第5期54卷 880-884页

作者： QI YanJun zhang {1. LI Tim wen min institute of Atmosp{1.ric Physics Chinese Academy of Sciences Beijing 100029 China State key {1. of Severe Weather Chinese Academy of Meteorological Sciences Beijing 100081 China Graduate university of t{1. Chinese Academy of sciences Beijing 100049 China International Pacific Research Center and Department of {1. University of Hawaii at Manoa Honolulu 96816 HI USA

The role of the intraseasonal oscillation (ISO) on the seasonal and interannual variations of the Indian summer monsoon is investigated based on the analysis of observational data. It is shown that the ISO significantly contributes to the establishment of low-level westerlies during the monsoon onset and developing periods. The effect of the ISO on the annual cycle of the monsoon is through nonlinear eddy momentum transport. On the interannual timescale, the Indian summer monsoon rainfall exhibits a significant out-of-phase relationship with the ISO intensity over the Indian monsoon region. In strong ISO years it appears the weak monsoon when there is an abnormal high over the India subcontinent in the lower troposphere. In weak ISO years there exists an abnormal low and the strong monsoon ap-pears.

关键词：大气季节震荡印度洋夏季季风年际变化

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基于随机森林的黄河源区土壤湿度降尺度研究

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水文 2024年第3期44卷 22-29页

作者：章雨晨付晓雷丁永建蒋晓蕾钟奇扬州大学水利科学与工程学院江苏扬州225009 水利部水文气象灾害机理与预警重点实验室南京信息工程大学江苏南京210044 中国气象局兰州干旱气象研究所甘肃兰州730020 河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 中国科学院西北生态环境资源研究院冰冻圈科学国家重点实验室甘肃兰州730000

土壤湿度作为全球水循环的重要变量,影响大气和地表水分交换。为获取高精度高空间分辨率的土壤湿度数据,以黄河源区为研究区域,基于9 km空间分辨率的SMAP(soil moisture active passive)遥感地表土壤湿度(SSM)和随机森林模型,结合地表... 详细信息

土壤湿度作为全球水循环的重要变量,影响大气和地表水分交换。为获取高精度高空间分辨率的土壤湿度数据,以黄河源区为研究区域,基于9 km空间分辨率的SMAP(soil moisture active passive)遥感地表土壤湿度(SSM)和随机森林模型,结合地表反照率、叶面积指数、归一化植被指数、地表温度、高程、土壤质地数据建立降尺度模型,获取黄河源区1.km空间分辨率的地表土壤湿度,分析不同时期(冻期、融期)土壤湿度变化规律及降尺度模型的效果,探讨土壤湿度的空间分布特征。结果表明:(1.相较于站点观测资料,SMAP SSM在冻期高估了地表土壤湿度,在非冻期对土壤湿度高位数表现为低估。(2)降尺度后的土壤湿度数据(1.km×1.km)在精度上高于SMAP SSM。(3)在冻期,对划分冻融期的土壤湿度数据应用降尺度模型效果优于不划分冻融期的降尺度效果;而在非冻期,不划分冻融期应用降尺度模型效果更佳。(4)从土壤湿度空间分布上看,SMAP SSM与降尺度结果具有一致性,土壤湿度总体上呈现东高西低的特点。研究结果可为黄河源区土壤湿度时空变化研究提供理论依据,对源区水资源分布规律提供参考。

关键词：黄河源区土壤湿度降尺度随机森林 SMAP SSM

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Accounting for CO2 Variability over East Asia with a Regional Joint Inversion System and Its Preliminary Evalua{1.

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Journal of meteorological Research 2017年第5期31卷 834-851页

作者： xingxia kou xiangjun tian meigen zhang z{1.n peng xiaoling zhang institute of urban {1. china meteorological administrationBeijing 100089 state key {1. of atmospheric boundary layer physics and atmospheric chemistry institute of atmospheric physicschinese academy of sciencesBeijing 100029 international center for climate and environment {1.s institute of atmospheric physicschinese academy of sciencesNanjing 210093 school of atmospheric {1.s nanjing university school of atmospheric {1.s chengdu university of information technologyChengdu 610225

A regional surface carbon dioxide （C02） flux inversion system, the Tan-Tracker-Region, was developed by incor- porating an assimila{1. scheme into the Community Multiscale Air Quality （CMAQ） regional chemical transport model to resolve fine-scale CO2 variability over East Asia. The proper orthogonal decomposi{1.-based ensemble four-dimensional varia{1.al data assimila{1. approach （POD-4DVar） is the core algorithm for the joint assimila{1. framework, and simultaneous assimila{1.s of CO2 concentra{1.s and surface CO2 fluxes are applied to help reduce the uncertainty in initial CO2 concentra{1.s. A persistence dynamical model was developed to describe the evolu- {1. of the surface CO2 fluxes and help avoid the ＂signal-to-noise＂ problem; thus, CO2 fluxes could be estimated as a whole at the model grid scale, with better use of observa{1. informa{1.. The performance of the regional inversion system was evaluated through a group of single-observa{1.-based observing system simula{1. experiments （OSSEs）. The results of the experiments suggest that a reliable performance of Tan-Tracker-Region is dependent on certain assimila{1. parameter choices, for example, an optimized window length of approximately 3 h, an ensemble size of approximately 1.0, and a covariance localiza{1. radius of approximately 320 km. This is probably due to the strong diurnal varia{1. and spatial heterogeneity in the fine-scale CMAQ simula{1., which could affect the perform- ance of the regional inversion system. In addi{1., because all observa{1.s can be artificially obtained in OSSEs, the performance of Tan-Tracker-Region was further evaluated through different densities of the artificial observa{1. net- work in different CO2 flux situa{1.s. The results indicate that more observa{1. sites would be useful to systematic- ally improve the estima{1. of CO2 concentra{1. and flux in large areas over the model domain. The work presented here forms a founda{1. for future research in w

关键词： surface CO2 flux inversion proper orthogonal decomposition (PDO) four-dimensional variational dataassimilation (4DVar) joint assimilation regional transport model

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From concept to action: a united, holistic and One {1.alth approach to respond to t{1. climate change crisis

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Infectious Diseases of Poverty 2022年第1期11卷 68-73页

作者： renhe {1. Xu Tang Jian Liu Martin Visbeck Huadong Guo Virginia Murray Catherine Mcgillycuddy Bing Ke Gretchen Kalonji Panmao Zhai Xiaoming Shi Jiahai Lu Xiaonong Zhou Haidong Kan Qunli Han Qian Ye Yong Luo Jianmin Chen wenjia Cai Huiling Ouyang Riyanti Djalante Alexander Baklanov Lu Ren Guy Brasseur George Fu Gao Lei Zhou Integrated Research on disaster Risk Interna{1.al Centre of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public health&institute of Atmospheric sciences Fudan UniversityShanghai200438China science Division United Nations Environment Programme(UNEP)United Nations AvenueGigiriPO Box 30552Nairobi00100Kenya GEOMAR helmholtz Centre for Ocean Research Kiel and Kiel {1. KielGermany key {1. of Digital Earth science Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina university of Chinese Academy of {1.s Chinese Academy of SciencesBeijingChina UK health Security Agency LondonSE18UGUK The Ad{1.istrative Center for china’s Agenda 21 Ministry of Science and Technology of ChinaBeijing100038China institute for {1. Management and Reconstruction Sichuan UniversityChengdu610207China State key {1. of Severe Weather Chinese Academy of Meteorological SciencesBeijing100081China china CDC {1. laboratory of Environment and Population health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing100021China One health Center of Excellence for Research and Training School of Public HealthSun Yat-Sen UniversityGuangzhouChina National {1. of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)ShanghaiChina Integrated Research On disaster Risk-IPO BeijingChina State key Lab of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing100875China ministry of Educa{1. key laboratory for Earth System Modeling and Department of Earth System ScienceTsinghua UniversityBeijingChina ASEAN Secretariat Indonesia Integrated Research on Disaster Risk(IRDR)JakartaIndonesia science and Innova{1. Department World Meteorological Organization(WMO)7 bisAvenue de la PaixBP2300CH-1211Geneva 2Switzerland Max Planck institute for {1. HamburgGermany Chinese Center for Dis

It is unequivocal that human influence has warmed the planet,which is seriously affecting the planetary health including human *** climate change should not only be a slogan,but requires a united,holistic action and a paradigm shift from crisis response to an ambitious and integrated approach *** the urgent needs to tackle the risk connection between climate change and One health,the four key messages and recommendations that with the intent to guide further research and to promote international cooperation to achieve a more climate-resilient world are provided.

关键词： Climate change One health International coordination and cooperation Risk-oriented recommendations

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Validating a dust production model by field experiment in Mu Us Desert,{1.

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Chinese science Bulletin 2006年第7期51卷 878-884页

作者： MEI Fanmin J. Rajot S. Alfaro L. Gomes {1. Xiaoye WANG Tao key {1. of Desert and Desertification Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China State key {1. of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an 710075 China Department of Environmental science and {1. Xi'an University of Engineering and Technology Xi'an 710048 China Center of Monitoring and Forecasting of Chemical Components of Atmosphere State Key Laboratory of Atmospheric Chemistry Institute of National Meteorology Research Beijing 100081 China Laboratoire lnteruniversitaire des Systemes Atmospheriques Universite de Paris 12 Paris 94010 France

Field experiments of dust production have been seldom performed in Chinese deserts that are identified as one of main dust sources in t{1. world, and such an experiment to validate a dust production model (DPM) has not been made in china until now. Saltation flux, dust emission flux, surface features and meteorological parameters (U*, Z0, Ri, etc.) were investigated in Mu Us Desert of china to verify t{1. DPM model and accumulate dust emission data during t{1. spring of 2002. It indicates that observed saltation fluxes from 0.07 to 8.00 g·m?1.s?1.are in good agreement with t{1. ones predicted by t{1. DPM model w{1.n t{1. constant of t{1. saltation flux equation is tuned to about 2.61. which corresponds to wind fric- tion velocities from 0.26 to 0.35 m·s?1. Unfortunately, during three local dust emission events, t{1. observed dust fluxes are from 1.to 3 μg· m?2· s?1. lower than t{1. modeled ones, implying that t{1. model needs to be improved furt{1.r under lower wind velocity. In comparison with data from a sandy soil with physical crust and a loam soil, saltation fluxes of t{1. loose sandy soil in Mu Us Desert are obviously hig{1.r, which suggests that deserts and sandy land with desertification are major dust sources in nort{1.rn china.

关键词：沙漠尘埃模拟野外试验

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围垦植稻对崇明东滩湿地产甲烷微生物的影响

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农业环境科学学报 2020年第2期39卷 411-417页

作者：张鑫磊宋怡轩张洁汪方圆张耀鸿贾仲君南京信息工程大学气象灾害预报预警与评估协同创新中心/江苏省农业气象重点实验室南京210044 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室南京210008 山西省气候中心太原030006

滨海湿地是CH4排放的重要自然源,受人类活动的影响较为强烈。本研究选择长江入海口崇明东滩自然湿地(光滩湿地和芦苇湿地)为对照,以空间代替时间变化,比较研究不同围垦年限(27、51.86年)的稻田耕作土壤产甲烷速率演替规律及其微生物数... 详细信息

滨海湿地是CH4排放的重要自然源,受人类活动的影响较为强烈。本研究选择长江入海口崇明东滩自然湿地(光滩湿地和芦苇湿地)为对照,以空间代替时间变化,比较研究不同围垦年限(27、51.86年)的稻田耕作土壤产甲烷速率演替规律及其微生物数量变异特征。结果表明,围垦稻田的产甲烷速率平均值为1..8ngCH4 g-1.d-1.是自然滩涂湿地的3.3倍,且随着围垦年限增加而显著增加。围垦稻田中产甲烷菌的mcrA基因拷贝数为1.1.1.1.8~1.443×1.8copies g-1.也随围垦年限增长而增加,比光滩湿地中的基因拷贝数高出一个数量级。光滩湿地产甲烷菌的相对丰度显著低于芦苇湿地和围垦稻田,围垦稻田中相对丰度值随围垦年限增长而显著增加。其中,H2/CO2营养型产甲烷菌的相对丰度随内陆方向和围垦年限增长而数量级水平增加,而甲基营养型产甲烷菌的相对丰度在光滩中最高,随内陆方向和围垦年限增长而数量级水平减小。各采样点中的乙酸营养型产甲烷菌相对丰度同处于一个数量级,其在3个围垦稻田中没有显著差异。相关性分析表明,产甲烷速率与H2/CO2营养型产甲烷菌丰度值呈显著正相关,而与甲基营养型产甲烷菌呈显著负相关。因此,围垦种稻的熟土作用促进了滨海湿地甲烷产生过程,H2/CO2营养型产甲烷菌数量的大幅增加是产甲烷速率升高的主控因素之一。

关键词：围垦稻田产甲烷速率 H2/CO2营养型产甲烷菌

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农牧交错带植被演变对区域气候影响的模拟

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高原气象 2018年第3期37卷 721-733页

作者：朱晗晖张宇沈晓燕王少影尚伦宇苏有琦中国科学院西北生态环境资源研究院/寒旱区陆面过程与气候变化重点实验甘肃兰州730000 中国科学院大学北京100049 成都信息工程大学四川成都610225 青海省气象科学研究所青海西宁810001

利用中尺度模式WRF和1.81.、1.90年卫星遥感地表分类数据,模拟分析了典型年份农牧交错带内地表植被变化对2001.201.年中国区域气候的影响。结果表明:(1.相对于1.81.,1.90年交错带内38°N以北(南)植被覆盖增加(减小),地表粗糙度增加(减... 详细信息

利用中尺度模式WRF和1.81.、1.90年卫星遥感地表分类数据,模拟分析了典型年份农牧交错带内地表植被变化对2001.201.年中国区域气候的影响。结果表明:(1.相对于1.81.,1.90年交错带内38°N以北(南)植被覆盖增加(减小),地表粗糙度增加(减小)。(2)当植被覆盖度增加(减小)、地表粗糙度增加(减小)时,交错带相应地区及附近地区温度升高(降低)。(3)交错带植被演变导致我国降水量差值场存在自东向西的"正-负-正"分布,地表粗糙度增加(减小)对应降水量差值增加(减少),且降水量越大,水循环越充足,植被演变对降水量的影响表现越突出。(4)交错带的植被演变主要影响中高层风场,且存在明显的季节性差异。500 h Pa气旋状(反气旋状)偏差风场环流中心对应着降水量差值场的正值(负值)。

关键词： WRF模式农牧交错带植被演变区域气候

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