RELATION BETWEEN RAPID UPLIFTING AND GRAVITATIONAL EQUILIBRIUM ,TECTONICS AND THERMODYNAMIC EFFECT IN QINGHAI—TIBET PLATEAU     

Chi Xiaoguo  Li Cai  Liu Shen  Yang Rihong 《地学前缘》2000,(Z1)

RELATION BETWEEN RAPID UPLIFTING AND GRAVITATIONAL EQUILIBRIUM ,TECTONICS AND THERMODYNAMIC EFFECT IN QINGHAI—TIBET PLATEAU  相似文献   

CENOZOIC VOLCANISM AND LITHOSPHERETECTONIC EVOLUTION IN NORTH TIBET     

Chi Xiaoguo  Li Cai  Jin Wei  Liu Shen  Yang Rihong 《地学前缘》2000,(Z1)

CENOZOIC VOLCANISM AND LITHOSPHERETECTONIC EVOLUTION IN NORTH TIBET  相似文献   

南海台风模式对台风利奇马快速增强预报能力研究     

黄燕燕  陈子通  冯业荣  张艳霞  徐道生  郑彬  靳卫卫 《气象》2024,50(5):532-546

针对台风利奇马（1909）,分析中国气象局南海台风模式（CMA-TRAMS）和欧洲中期天气预报中心高分辨率模式（HRES）对台风快速增强的业务预报情况,并基于CMA-TRAMS,从水平分辨率、初始场和边界条件、物理参数化方案等角度设计并开展数值敏感性试验。CMA-TRAMS和HRES对“利奇马”增强具有一定预报能力,但对快速增强的速度预报明显低于实况,均不能满足24h和12h快速增强标准,可达到6h快速增强标准。CMA-TRAMS采用3km分辨率对“利奇马”移动路径和强度变化的预报效果优于9km分辨率,但未改进快速增强预报效果;采用3km嵌套9km的方案,模式对台风快速增强的预报效果明显提升。采用MRF边界层参数化方案对台风路径、强度、快速增强的预报效果总体优于YSU方案。海温参数化结合32层垂直分辨率的初始场和边界条件的方案明显提高了快速增强预报效果,预报快速增强的频次、增强的最大速度更接近实况。分析表明,海温参数化方案使海气温差增大,在短时间内对大气、海洋之间的热量输送和交换有明显影响,海洋向大气输送的感热通量和台风内核区的潜热通量加强使内核更暖湿、气压负倾向增大,是预报效果改进的主要原因。  相似文献   

A Catalog and Statistical Analysis for Magnetic Stars     

Abdurepqet Rustem  Guo-Liang Lü  Jin-Zhong Liu  Chun-Hua Zhu  Yu Zhang  Dong-Xiang Shen  Yu-Hao Zhang  Xiao-Long He 《天文和天体物理学研究(英文版)》2023,(9):266-310

Magnetic fields are significant in the structure and evolution of stars. We present a comprehensive catalog of 1784known magnetic stars, detailing their identifications, HD numbers, precise locations, spectral types and averaged quadratic effective magnetic fields among other important information. The group comprises 177 O-type stars, 551B-type stars, 520 A-type stars, 91 F-type stars, 53 G-type stars, 61 K-type stars, 31 M-type stars and an additional300 stars whose spectral classification rem...  相似文献   

A Novel Low-frequency Radio Astronomical Observation Array (1～90 MHz) and its First Light     

Wen-Jun Yang  Zhen Wang  Ming-Yuan Wang  Fa-Bao Yan  Guang Lu  Guan-Nan Gao  Shao-Jie Guo  Yu-Mei Shen  Bing-Qiang Xu  Yu Bai  Yong Chen  Jin-Song Ping 《天文和天体物理学研究(英文版)》2023,(12):98-106

The extremely low frequency( f < 40 MHz) is a very important frequency band for modern radio astronomy observations. It is also a key frequency band for solar radio bursts, planetary radio bursts, fast radio bursts detected in the lunar space electromagnetic environment, and the Earth’s middle and upper atmosphere with low dispersion values. In this frequency band, the solar stellar activity, the early state of the universe, and the radiation characteristics of the planetary magnetosphere and...  相似文献   

Analytical Study of the Co-orbital Motion in the Circular Restricted Three-body Problem     

Xinhe Shen  Tao Liu  Xinhao Liao 《天文和天体物理学研究(英文版)》2023,(4):123-134

In the restricted three-body problem(RTBP), if a small body and a planet stably orbit around a central star with almost exactly the same semimajor axis, and thus almost the same mean motion, this phenomenon is called the coorbital motion, or equivalently, the 1:1 mean motion resonance. The classical expansion of the disturbing function is divergent when the semimajor axis ratio of the small body to the planet is close to unity. Thus, most of the previous studies on the co-orbital dynamics were c...  相似文献   

伶仃河口湾铜鼓水域水沙净输运分析   总被引：7，自引：1，他引：6  

陈子 《海洋工程》1999,(1):2

根据对珠江伶仃河口湾铜鼓水域丰水期９个测站大、中、小潮三次同步水文泥沙资料及５７个底质样品的分析结果,本文讨论了此水域的水沙净输运趋势。结果表明,铜鼓水域表层余流向海,浅滩测站中底层余流指向河口方向,欧拉余流主要由径流构成。沟槽悬沙输运以净平流作用为主,浅滩区则以向上游的潮抽吸输运为主。沉积物净输运趋势显示铜鼓浅滩是海陆双向底质输运的汇聚地带  相似文献   

Observation Study on Precursory Geosound: Extraction of Nucleation Information in the Earthquake Preparation Process     

Zheng Zhizhen  Robert K. Vincent  Shen Ping  and Yang XuanhuiCenter for Seismic Data  Information  CSB  Beijing  China Bowling Green State University  Ohio -  USA Institute of Geophysics  CSB  Beijing  China 《中国地震研究》1999,(4)

In this paper, the observation networks of precursory geosound and observation instruments are introduced first. Then it is mentioned, in particular, that audible precursory geosound was instrumentally recorded for the first time. The following section discussed the relation between the geosound and earthquake. Finally, the Nucleation time in earthquake preparation process is discussed.  相似文献   

Variation of alkaline phosphatase activity in sediments of shrimp culture ponds and its relationship with the contents of C,N and P   总被引：1，自引：0，他引：1  

SU Yuepeng  MA Shen  and DONG Shuanglin Mariculture Research Laboratory  Ocean University of China  Qingdao  P.R. China 《中国海洋大学学报(英文版)》2005,4(1):75-79

1Introduction Activities of extracellular enzymes can serve as theindicators of organic matter content.Enzyme assayinghas been used in the analyses of dissolved organic ma-terials in aquatic environments(Chrost,1991),massloss of plant litter in terrestrial systems(Sinsabaughet al.,1992;Sinsabaugh et al.,1994),processing ofpaniculate and dissolved organic carbon(POC,DOC)in streams(Sinsabaugh and Findlay,1995;Findlayet al.,1998),and processing of particulate organicmatter(POM)in wetlands(J…  相似文献   

Quantitative estimation of the influence factors on snow/ice albedo     

ZhongMing Guo  NingLian Wang  BaoShou Shen  ZhuJun Gu  HongBo Wu  YuWei Wu  AnAn Chen  Xi Jiang 《寒旱区科学》2020,(2):83-94

Quantitative estimation of the influence of various factors,such as black carbon,snow grain,dust content,and water con tent on albedo is essential in obtaining an accurate albedo.In this paper,field measurement data,including snow grain size,density,liquid water content,and snow depth was obtained.Black carbon and dust samples were collected from the snow surface.A simultaneous observation using ASD(Analytical Spectral Devices)spectral data was employed in the Qiyi glacier located on Qilian Mountain.The measurements were compared with results obtained from the Snow,Ice,and Aerosol Radiation(SNICAR)model.Additionally,a HYbrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)air mass backward trajectory model was used to track the source of black carbon.The simulation was found to correlate well with observed data.Liquid water content was the most influential factor of albedo among the several influencing fac tors,followed by black carbon content and snow grain size.Finally,snow density change had the least toward albedo.HYSPLIT atmospheric trajectories model can only approximately show the source of black carbon and not clearly indicate the source region of black carbon.  相似文献