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Modifications in aerosol physical, optical and radiative properties during heavy aerosol events over Dushanbe, Central Asia

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Geoscience Frontiers 2021年第6期12卷 299-312页

作者： Dipesh Rupakheti Maheswar Rupakheti xiufeng yin Julian Hofer Mukesh Rai Yuling Hu Sabur F.Abdullaev Shichang Kang State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Institute for Advanced Sustainability Studies PotsdamGermany Leibniz Institute for Tropospheric Research LeipzigGermany Physical Technical Institute of the Academy of Sciences of Tajikistan DushanbeTajikistan Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China

The location of Central Asia,almost at the center of the global dust belt region,makes it susceptible for dust *** studies on atmospheric impact of dust over the region are very limited despite the large area occupied by the region and its proximity to the mountain regions (Tianshan,Hindu Kush-KarakoramHimalayas,and Tibetan Plateau).In this study,we analyse and explain the modification in aerosols’physical,optical and radiative properties during various levels of aerosol loading observed over Central Asia utilizing the data collected during 2010–2018 at the AERONET station in Dushanbe,*** episodes were classified as strong anthropogenic,strong dust and extreme *** mean aerosol optical depth (AOD) during these three types of events was observed a factor of ~3,3.5 and 6.6,respectively,higher than the mean AOD for the period 2010–*** corresponding mean fine-mode fraction was 0.94,0.20 and 0.16,respectively,clearly indicating the dominance of fine-mode anthropogenic aerosol during the first type of events,whereas coarse-mode dust aerosol dominated during the other two types of *** was corroborated by the relationships among various aerosol parameters (AOD ***,and EAE ***,SSA and RRI).The mean aerosol radiative forcing (ARF) at the top of the atmosphere (ARF_(TOA)),the bottom of the atmosphere (ARF_(BOA)),and in the atmosphere (ARFATM) were -35±7,-73±16,and38±17 Wm^(-2)during strong anthropogenic events,-48±12,-85±24,and 37±15 Wm^(-2)during strong dust event,and -68±19,-117±38,and 49±21 Wm-2during extreme dust *** in aerosol loading enhanced the aerosol-induced atmospheric heating rate to 0.5–1.6 K day^(-1)(strong anthropogenic events),0.4–1.9 K day^(-1)(strong dust events) and 0.8–2.7 K day^(-1)(extreme dust events).The source regions of air masses to Dushanbe during the onset of such events are also *** study contributes to the understanding of dust and anthropogenic aerosols,in particular the extreme

关键词： Dust events Aerosol optical properties AERONET Dushanbe Central Asia

Carbonaceous aerosol transport from the Indo-Gangetic Plain to the Himalayas:Carbon isotope evidence and light absorption characteristics

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Geoscience Frontiers 2023年第2期14卷 105-115页

作者： Pengfei Chen Shichang Kang Chaoliu Li Zhaofu Hu Lekhendra Tripathee Mukesh Rai Tao Pu xiufeng yin Örjan Gustafsson State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Department of Environmental Science The Bolin Centre for Climate ResearchStockholm UniversityStockholm 10691Sweden The Bolin Centre for Climate Research Stockholm UniversityStockholm 10691Sweden

The Indo-Gangetic Plain(IGP)is a major regional and global emitter of atmospheric pollutants,which adversely affect surrounding areas such as the *** present a comprehensive dataset on carbonaceous aerosol(CA)composition,radiocarbon(D14C)-based source apportionment,and light absorption of total suspended particle(TSP)samples collected over a 3-year period from high-altitude Jomsom in the central *** 3-year mean TSP,organic carbon(OC),and elemental carbon(EC)concentrations were 92.0±28.6,9.74±6.31,and 2.02±1.35 lg m^(3),respectively,with the highest concentrations observed during the pre-monsoon season,followed by the post-monsoon,winter,and monsoon *** △^(14)C analysis revealed that the contribution of fossil fuel combustion(ffossil)to EC was 47.9%±11.5%,which is consistent with observations in urban and remote regions in South Asia and attests that EC likely arrives in Jomsom from upwind IGP sources via long-range *** addition,the lowest f_(fossil)(38.7%±13.3%)was observed in winter,indicating large contributions in this season from local biomass *** mass absorption cross-section of EC(MACEC:8.27±1.76 m^(2)/g)and watersoluble organic carbon(MACWSOC:0.98±0.45 m^(2)/g)were slightly higher and lower than those reported in urban regions,respectively,indicating that CA undergo an aging *** aerosol coating during transport and variation of biomass burning probably led to the seasonal variation in MAC of two ***,WSOC contributed considerably to the light absorption(11.1%±4.23%)of *** findings suggest that to protect glaciers of the Himalayas from pollution-related melting,it is essential to mitigate emissions from the IGP.

关键词： Carbonaceous aerosol Long-range transport Carbon isotope Source apportionment Light absorption The Himalayas

Influence of transboundary air pollution on air quality in southwestern China

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Geoscience Frontiers 2021年第6期12卷 114-128页

作者： xiufeng yin Shichang Kang Maheswar Rupakheti Benjamin de Foy Ping Li Junhua Yang Kunpeng Wu Qianggong Zhang Dipesh Rupakheti State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of ScienceLanzhou 730000China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100039China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100085China Institute for Advanced Sustainability Studies PotsdamGermany Department of Earth and Atmospheric Sciences Saint Louis UniversitySt.LouisMO 63108USA Northwest Institute of Eco-Environment and Resources Chinese Academy of ScienceLanzhou 730000China Institute of International Rivers and Eco-Security Yunnan UniversityKunming 650091China

Air pollution is a grand challenge of our time due to its multitude of adverse impacts on environment and society,with the scale of impacts more severe in developing countries,including ***,China has initiated and implemented strict air pollution control measures over last several years to reduce impacts of air *** data from Jan 2015 to Dec 2019 on six criteria air pollutants(SO_(2),NO_(2),CO,O_(3),PM_(2.5),and PM_(10))at eight sites in southwestern China were investigated to understand the situation and analyze the impacts of transboundary air pollutants in this *** terms of seasonal variation,the maximum concentrations of air pollutants at these sites were observed in winter or spring season depending on individual *** diurnal variation,surface ozone peaked in the afternoon while the other pollutants had a bimodal pattern with peaks in the morning and late *** was limited transport of domestic emissions of air pollutants in China to these *** emissions enhanced the concentrations of air pollutants during some pollution ***,the transboundary transport of air pollution from South Asia and Southeast Asia was associated with high concentrations of most air pollutants observed in southwestern *** air pollutants can be transported to southwestern China over long distances from the source regions,it is necessary to conduct more research to properly attribute and quantify transboundary transport of air pollutants,which will provide more solid scientific guidance for air pollution management in southwestern China.

关键词： Air pollutants Transboundary transport Southwestern China

Impacts of Indian summer monsoon and stratospheric intrusion on air pollutants in the inland Tibetan Plateau

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Geoscience Frontiers 2021年第6期12卷 294-298页

作者： xiufeng yin Shichang Kang Benjamin de Foy Dipesh Rupakheti Maheswar Rupakheti Zhiyuan Cong Xin Wanb Guoshuai Zhang Qianggong Zhang State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China Department of Earth and Atmospheric Sciences Saint Louis UniversitySt.LouisMO 63108USA Institute for Advanced Sustainability Studies PotsdamGermany Chinese Academy of Environmental Planning Beijing 100012China

Air pollutants can be transported to the pristine regions such as the Tibetan Plateau,by monsoon and stratospheric *** Tibetan Plateau region has limited local anthropogenic emissions,while this region is influenced strongly by transport of heavy emissions mainly from South *** conducted a comprehensive study on various air pollutants (PM_(2.5),total gaseous mercury,and surface ozone) at Nam Co Station in the inland Tibetan *** mean PM_(2.5)concentration at Nam Co peaked in April before monsoon season,and decreased during the whole monsoon season (June–September).Monthly mean total gaseous mercury concentrations at Nam Co peaked in July and were in high levels during monsoon *** Indian summer monsoon acted as a facilitator for transporting gaseous pollutants (total gaseous mercury) but a suppressor for particulate pollutants (PM_(2.5)) during the monsoon *** from both PM_(2.5)and total gaseous mercury variabilities,surface ozone concentrations at Nam Co are primarily attributed to stratospheric intrusion of ozone and peaked in *** effects of the Indian summer monsoon and stratospheric intrusion on air pollutants in the inland Tibetan Plateau are complex and require further studies.

关键词： Tibetan Plateau Nam Co PM_(2.5) Total gaseous mercury Surface ozone

Influence of Interspecies interactions on bacterial community assembly in the active and permafrost layers on the Qinghai-Tibet Plateau

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Journal of Earth Science 2024年

作者： Hongfei Chi xiufeng yin Xuefeng Zhang Jingyi Zhu Lin Zhao Yongcui Deng Pengfei Liu Yongqin Liu College of Ecology， Lanzhou University Center for the Pan-Third Pole Environment， Lanzhou University State Key Laboratory of Cryospheric Science， Northwest Institute of Eco-Environment and Resources， Chinese Academy of Science State Key Laboratory of Tibetan Plateau Earth System， Resources and Environment (TPESRE)， Institute of Tibetan Plateau Research， Chinese Academy of Sciences College of Resources and Environment， University of Chinese Academy of Sciences School of Geographical Sciences， Nanjing University of Information Science and Technology School of Geography， Nanjing Normal University Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application

Bacterial communities play a crucial role in permafrost biogeochemical cycling and ecosystem function maintenance. Bacterial interaction is one of the main factors in shaping soil bacterial communities. However， how would bacterial interaction influence the bacterial communities in permafrost of the Qinghai–Tibet Plateau (QTP) remains largely unknown. Here we collected paired soil samples from both the active and permafrost layers of two typical QTP permafrost regions in October 2020 for Tuotuohe River (TTH) and May 2022 for Aerjin (ARJ)， and investigated the bacterial communities and the role of interactions in structuring the bacterial community and its assembly process through amplicon sequencing of the 16S rRNA gene. Our study revealed distinct bacterial communities， with significant differences in the relative abundances of Proteobacteria (P<0.05)， Acidobacteriota (P<0.001)， Bacteroidota (P<0.05)， and Planctomycetota (P<0.001) between the active layer and the permafrost layer. More importantly， we found that interspecies interactions， including both positive and negative associations， were strongly correlated with bacterial alpha-diversity and played a significant role in community variation and assembly process. Our findings also showed that the community assembly in both the active and permafrost layers was primarily driven by homogeneous selection of deterministic processes， with interspecies interactions accounting for more than 58% and 63% of all assembly mechanisms， respectively. This is the first study to quantify the contribution of bacterial interactions in shaping the bacterial community and its assembly process in permafrost of QTP， highlighting the importance of considering interspecies interactions in future modeling efforts. Our work also emphasizes the necessity of including interspecies interactions in microbial process projections to reduce uncertainty.

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慢性髓性白血病患者BCR-ABL激酶区突变的检测及临床意义

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中华血液学杂志 2014年第2期35卷 95-97页

作者：金洁阴秀峰浙江大学医学院附属第一医院、血液病研究所杭州310003

BCR-ABL融合基因是慢性髓性白血病（CML）致病的始动和核心因素，酪氨酸激酶抑制剂（TKI）伊马替尼从根本上改变了CML的治疗流程和结果，并成为恶性肿瘤靶向治疗的里程碑。

关键词： BCR-ABL融合基因酪氨酸激酶抑制剂慢性髓性白血病白血病患者临床意义检测突变靶向治疗

Himalayas as a global hot spot of springtime stratospheric intrusions:Insight from isotopic signatures in sulfate aerosols

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Research in Cold and Arid Regions 2024年第1期16卷 5-13页

作者： Kun Wang ShiChang Kang Mang Lin PengFei Chen ChaoLiu Li xiufeng yin Shohei Hattori Teresa L.Jackson JunHua Yang YiXi Liu Naohiro Yoshida Mark HThiemens State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryCASGuangzhouGuangdong 510640China University of Chinese Academy of Sciences Beijing 100049China International Center for Isotope Effects Research(ICIER) School of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Frontiers Science Center for Critical Earth Material Cycling State Key Laboratory for Mineral Deposits ResearchSchool of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Department of Chemical Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohamaKanagawa 226-8502Japan Department of Chemistry and Biochemistry University of California San DiegoLa JollaCA 92093-0021USA Earth-Life Science Institute Tokyo Institute of TechnologyMeguro-kuTokyo 152-8551Japan National Institute of Information and Communications Technology KoganeiTokyo 184-8795Japan

Downward transport of stratospheric air into the troposphere(identified as stratospheric intrusions)could potentially modify the radiation budget and chemical of the Earth's surface *** the highest and largest plateau on earth,the Tibetan Plateau including the Himalayas couples to global climate,and has attracted widespread attention due to rapid warming and cryospheric *** studies recognized strong stratospheric intrusions in the Himalayas but are poorly understood due to limited direct evidences and the complexity of the meteorological dynamics of the third ***^(35)S is a radioactive isotope predominately produced in the lower stratosphere and has been demonstrated as a sensitive chemical tracer to detect stratospherically sourced air mass in the planetary boundary ***,we report 6-month(April–September 2018)observation of^(35)S in atmospheric sulfate aerosols(^(35)SO_(4)^(2-))collected from a remote site in the Himalayas to reveal the stratospheric intrusion phenomenon as well as its potential impacts in this *** the sampling campaign,the^(35)SO_(4)^(2-)concentrations show an average of 1,070±980 atoms/m^(3).In springtime,the average is 1,620±730 atoms/m^(3),significantly higher than the global existing data measured so *** significant enrichments of^(35)SO_(4)^(2-)measured in this study verified the hypothesis that the Himalayas is a global hot spot of stratospheric intrusions,especially during the springtime as a consequence of its unique geology and atmospheric *** combined with the ancillary evidences,e.g.,oxygen-17 anomaly in sulfate and modeling results,we found that the stratospheric intrusions have a profound impact on the surface ozone concentrations over the study region,and potentially have the ability to constrain how the mechanisms of sulfate oxidation are affected by a change in plateau atmospheric properties and *** study provides new observational constraints on stra

关键词： Himalayas Stratospheric intrusions Cosmogenic^(35)SO_(4)^(2-) Ozone Atmospheric oxidation

天山夏特河流域晚第四纪冰川沉积序列与地貌演化

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冰川冻土 2021年第3期43卷 747-755页

作者：刘瑞连赵井东殷秀峰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 中国科学院大学北京100049

夏特河源于天山最大现代冰川作用中心托木尔—汗腾格里峰的东北坡,流域内保存有形态较为清晰的四套冰川沉积。这些地形记录了夏特河流域的古冰川变化,对它们进行研究可获得该地晚第四纪以来的冰川时空演化规律。在第三套冰碛夹层中的砂... 详细信息

夏特河源于天山最大现代冰川作用中心托木尔—汗腾格里峰的东北坡,流域内保存有形态较为清晰的四套冰川沉积。这些地形记录了夏特河流域的古冰川变化,对它们进行研究可获得该地晚第四纪以来的冰川时空演化规律。在第三套冰碛夹层中的砂质透镜体里采集了5个OSL年代学样品,应用单片再生(SAR)测年技术测得它们的年龄为(13.3±0.8)~(20.1±1.3)ka。基于测年结果、各套冰碛距现代冰川的远近、冰碛垄的完整程度、冰碛物的风化胶结状况及接触关系,并参阅托木尔—汗腾格里峰南坡与东南坡以及东、中、西段天山其他流域的年代学资料,可初步得出:第一套和第二套冰碛分别沉积于小冰期和新冰期;第三套冰碛形成于末次盛冰期及随后的冰消期,可对应于海洋氧同位素阶段(MIS)2;保存在河口的第四套冰川沉积及与其相关联的宽阔且长达数十千米的“U”形谷共同指示,它应形成于冰川规模较大的倒数第二次冰期,时间上可对应于MIS 6。

关键词： OSL测年晚第四纪托木尔峰地区天山

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职务作品中单位优先使用权研究

安徽警官职业学院学报 2008年第1期7卷 29-30页

作者：尹秀峰谷长江烟台大学法学院山东烟台264005

在我国著作权立法上,单位优先使用权具有创见性。由于英美法系和大陆法系国家无类似制度可考,且我国学界对其重视的力度不够,导致司法实践出现了诸多问题。因此,从宏观上认识单位优先使用权的性质和法理依据,对解决单位优先使用权导致... 详细信息

在我国著作权立法上,单位优先使用权具有创见性。由于英美法系和大陆法系国家无类似制度可考,且我国学界对其重视的力度不够,导致司法实践出现了诸多问题。因此,从宏观上认识单位优先使用权的性质和法理依据,对解决单位优先使用权导致的权利冲突,进而构建和谐的权利体系具有积极意义。

关键词：优先使用权利益平衡权利滥用