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Measurement of Martian atmospheric winds by the O_(2) 1.27 μm airglow observations using Doppler Michelson Interferometry: A concept study

第28届中国气象学会年会

作者： Dan Dan liu a ,tao yu a,b , JingSong {3.g b , Cong Huang aa national center for Space Weather, cma, beijing 100081, china b institute of geology and geophysics, cas, beijing 100029, china

In this paper, using nonlinear radial basis function (RbF) neural networks (NNs) forecasting methods to predict the critical frequency (f o F 2 ) of a middle-low latitude station (WuHan) is presented. Principal component analysis is adopted for the purposes of noise and dimension reduction. The whole study is based on a sample of about 26000 observations of f o F 2 with 1-hour time resolution. Embedding dimension of the dynamical system that generates above sample is estimated using the nearest neighbor method. This information is then utilized for the training of the predictors employed in this study.

关键词： storm Using the Radial basis Function Neural Network to Predict Ionospheric Critical Frequency of F2-layer over Wuhan

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Science china Earth Sciences 2021年第11期64卷 2027-2042页

作者： Na YANG Chunliang XIA tao yu Xiaomin ZUO Yangyi SUN Xiangxiang YAN Jian ZHANG Jin wanG Huijun LE {3. liu William Edmund WARD Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China Mohe Observatory of geophysics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Department of Physics University of New BrunswickNew BrunswickFredericton E3B 5A3Canada

china’s Mars exploration mission has stimulated tremendous interest in planetary science exploration *** propose potential scientific research projects,this study presents a concept simulation for the measurement of Martian atmospheric winds using the Doppler Michelson interferometry *** simulation is based on the satellite instrument initially designed for the Dynamic Atmosphere Mars Observer(DYNAMO)project to measure vertical profiles of winds from the 1.27μm airglow observations in the Martian atmosphere.A comprehensive DYNAMO measurement simulation forward model based on an orbit submodel,an atmospheric background field submodel,and an instrument submodel is developed using the Michelson *** simulated interferogram signal over the field of view(FOV)calculated by the forward model is associated with the filter transmittance function,column emission rate of airglow,wind velocity,temperature,and the Michelson *** agreement between the derived atmospheric signals from the simulated interferogram without altitude inversion and the input parameters used to initiate the forward model confirms the validity of the forward model.

关键词： Martian atmospheric wind Doppler Michelson interferometer 1.27μm airglow

Late Cenozoic uplift of the liupan Mountains:Evidence from the Neogene loess deposits

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Science china Earth Sciences 2024年第5期67卷 1480-1488页

作者： Zhilin HE Yansong QIAO Zhengtang GUO Chaoqin CHEN Long CHEN Yang FU Ye YANG Yanxia LIANG Xinru LIN Guoqiao XIAO tao ZHAN Key Laboratory of Cenozoic geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China cas center for Excellence in Life and Paleoenvironment Beijing 100044China University of Chinese Academy of Sciences Beijing 100049China institute of Ecological geology Survey and Research of Heilongjiang Province Harbin 150030China School of Geography and Information Engineering China University of GeosciencesWuhan 430078China School of Earth Sciences China University of GeosciencesWuhan 430074China Natural Resources Survey institute of Heilongjiang Province Harbin 150036China

The liupan Mountains,one of the important mountain ranges in western china,are located on the boundary between the northeastern Tibetan Plateau and the Ordos *** uplift history of the liupan Mountains remains *** deposits are good tracers of regional tectonic and geomorphic changes,because loess is sensitive to erosion and the formation and preservation of loess requires relatively flat highlands and relatively stable tectonic *** investigated the distribution of Neogene loess deposits on the western piedmont of the liupan Mountains and examined a near-continuous loess section(Nanping section)on the piedmont alluvial *** of magnetic susceptibility stratigraphy with the QA-ⅠMiocene loess sequence dates this 56-m section covering the interval from~8.1 to 6.2 *** lower boundary age of this section,together with previously reported Zhuanglang red clay(sand-gravel layers with intercalated loess during~9–8 Ma and near-continuous loess during~8–4.8 Ma)and Chaona red clay(~8.1–2.58 Ma),indicates that the liupan Mountains were uplifted in the late Miocene(~9–8 Ma)and basically formed by~8 Ma,attesting to no intense mountain building since that *** addition,based on the information from the Zhuanglang core and the QA-Ⅰsection,we infer that sizable parts of the liupan Mountains were uplifted during the late Oligocene–early Miocene and did not experience intense uplift during~22–9 Ma.

关键词： liupan Mountains Mountain building Neogene Loess Chinese Loess Plateau Late Miocene Late Oligocene–early Miocene

Joint tomographic inversion of first-arrival and reflection traveltimes for recovering 2-D seismic velocity structure with an irregular free surface

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Earth and Planetary Physics 2018年第3期2卷 220-230页

作者： XinYan Zhang ZhiMing bai tao Xu Rui Gao QiuSheng Li Jue Hou José badal Key Laboratory of Deep-Earth Dynamics of Ministry of Land and Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China cas center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China School of Earth Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China institute of geophysics China Earthquake AdministrationBeijing 100081China Physics of the Earth Sciences BUniversity of ZaragozaSpain

Irregular surface flattening,which is based on a boundary conforming grid and the transformation between curvilinear and Cartesian coordinate systems,is a mathematical method that can elegantly handle irregular surfaces,but has been limited to obtaining first arrivals *** combining a multistage scheme with the fast-sweeping method(FSM,the method to obtain first-arrival traveltime in curvilinear coordinates),the reflected waves from a crustal interface can be traced in a topographic model,in which the reflected wavefront is obtained by reinitializing traveltimes in the interface for upwind branches.A local triangulation is applied to make a connection between velocity and interface *** a joint inversion of first-arrival and reflection traveltimes for imaging seismic velocity structures in complex terrains is *** examples all perform well with different seismic velocity *** increasing topographic complexity and even use of a high curvature reflector in these models demonstrate the reliability,accuracy and robustness of the new working scheme;checkerboard testing illustrates the method's high *** tolerance testing indicates the method's ability to yield practical traveltime *** development of the multistage scheme will allow other later arrivals to be traced and used in the traveltime inversion.

关键词： irregular surface flattening boundary conforming grid multistage scheme traveltime tomography

Density structure of the crust in the Emeishan large igneous province revealed by the Lijiang-Guiyang gravity profile

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Earth and Planetary Physics 2018年第1期2卷 74-81页

作者： Xi Zhang Peng wang tao Xu yun Chen José badal JiWen Teng State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China institute of Earthquake Science China Earthquake AdministrationBeijing 100036China cas center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Physics of the Earth Sciences BUniversity of ZaragozaPedro Cerbuna 1250009 ZaragozaSpain

The Emeishan large igneous province(hereafter named by its acronym ELIP) is the first accepted large igneous region in *** current study tries to reconstruct the density structure of the crust in this region. For this purpose, we conducted the gravity survey along an 800-km-long profile, which stretched laterally along the latitude 27°N from Lijiang(yunnan province) to Guiyang(Guizhou province). The fieldwork included 3.8 gravity measurements distributed from the inner zone to the outer zone of the mantle plume *** a series of gravity reductions, we calculated the bouguer gravity anomaly and then constructed the density model for ELIP by iterative forward modeling from an initial density model tightly constrained by wide-angle seismic reflection data. The topography of the Moho, here physically interpreted as a density discontinuity of ~0.4 g·cm^(–3., gradually rises from the inner zone(~50 km deep) to the outer zone(~40 km), describes a thicker crust in the inner zone than in any other segment of the profile and largely reproduces the shape of the bouguer gravity anomaly curve. both the bouguer gravity and the density structure show significant differences with respect to the inner zone and the other two zones of ELIP according to the commonly accepted partition of the Emeishan area. A thicker and denser middle-lower crust seems to be the main feature of the western section of the profile, which is likely related to its mafic magmatic composition due to magmatic underplating of the Permian mantle plume.

关键词： bouguer gravity seismic reflection data forward modeling crustal density structure Emeishan large igneous province South china

Sub-percent precision measurement of neutrino oscillation parameters with JUNO

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Chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Weidong bai Nikita balashov wander baldini Andrea barresi Davide basilico Eric baussan Marco bellato Antonio bergnoli Thilo birkenfeld Sylvie blin David blum Simon blyth Anastasia bolshakova Mathieu bongrand Clément bordereau Dominique breton Augusto brigatti Riccardo brugnera Riccardo bruno Antonio budano Jose busto Ilya butorov Anatael Cabrera barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan Chang yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen yu Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Donghua Fan Lei Fan Jian Fang Wenxing Fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei Li-Cheng Feng Qichun Feng Richard Ford Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu Xiaofei Gu yu Gu Mengyun Guan yuduo Guan Nunzio Guardone Cong Guo Jingyuan Guo wanlei Guo Xinheng Guo yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He Wei He Tobias Heinz Patrick Hellmuth yuekun Heng Rafael Herrera yuenKeung Ho Yerevan Physics institute YerevanArmenia UniversiéLibre de bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile beijing institute of Spacecraft Environment Engineering BeijingChina beijing Normal University BeijingChina china institute of Atomic Energy BeijingChina institute of High Energy Physics BeijingChina North china Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of Chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-Sen University GuangzhouChina Harbin institute of Technology HarbinChina University of Science and Technology of china HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South china HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing University NanjingChina Guangxi University NanningChina East china University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee institute Shanghai Jiao Tong UniversityShanghaiChina institute of Hydrogeology and Environmental geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an Jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUNO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_(3.)^(2),△m_(21)^(2),sin^(2)θ_(12),and sin^(2)θ_(13. oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the tao satellite *** is found that the △m_(21)^(2) and sin^(2)θ_(12) oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(3.)^(2) parameter will be determined to about 0.2%precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUNO

大陆俯冲板片的持续断离正在终结喜马拉雅造山作用

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Science bulletin 2023年第23期68卷 3048-3054,M0006页

作者：梁晓峰褚杨万博陈凌陈林 Eric Sandvol Stephen P.Grand 李仪兵王敏玲田小波陈赟徐涛李杨纪伟强 State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences(CAS)Beijing 100029China cas center for Excellence in Deep Earth Science Guangzhou 510640China Department of Geological Sciences University of MissouriColumbia MO 65211USA Department of Geological Sciences University of Texas at AustinAustin TX 78712USA College of Earth Sciences Guilin University of TechnologyGuilin 541004China

俯冲的大陆岩石圈在大陆碰撞后仍然对地表板块施加拖拽作用,使造山作用得以维持.但是大陆碰撞作用最终为何减弱乃至停止,目前存在多种解释.本文利用覆盖青藏高原的流动地震观测数据,进行地震层析成像研究,在地慢过渡带中识别出多个高地... 详细信息

俯冲的大陆岩石圈在大陆碰撞后仍然对地表板块施加拖拽作用,使造山作用得以维持.但是大陆碰撞作用最终为何减弱乃至停止,目前存在多种解释.本文利用覆盖青藏高原的流动地震观测数据,进行地震层析成像研究,在地慢过渡带中识别出多个高地震波速度异常,认为它们是俯冲印度大陆岩石圈断离形成的碎片.俯冲板片会不断沿大陆岩石圈内部的先存薄弱带断离,该过程将持续减小俯冲岩石圈的板片拖曳力,进而导致中新世印度-欧亚板块汇聚速率降低.据此推断,俯冲大陆板片持续断离将导致印欧大陆碰撞和喜马拉雅造山作用最终结束.

关键词： Tibetan Plateau Seismic tomography Continental collision Slab fragmentation Slab pull