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Fringing Red Sea Corals Survival: Is It Tide or Local Wind?

open Journal of Ecology 2020年第5期10卷 225-242页

作者： Mohamed Zaki Moustafa Mary Sue Moustafa h₂o & geo llc West Palm Beach USA

In this paper, we obtain tidal constituents and discuss observations of tidal and wind variations and its impact on water surface elevation at Zaki’s Reef;a fringing coral reef located in the Red Sea-Gulf of Suez. This manuscript focuses on investigating if tidal forces are playing a key role to keep the area’s unique coral reefs alive and well. Determining the reasons why coral species and community of organisms found here survive despite all stressors is critical, and such information may hold the key to the preservation of reefs elsewhere. Phase and amplitude for 35 tidal constituents were deducted from observations of water surface elevation at the study site (first of its kind). The main tidal constituents based on their amplitudes are: M2, N2, S2, K1, NU2, K2, 2Ns, L2, and MU2. The first five tidal constituents of the aforementioned list are enough to reproduce accurate predictions of tides at this location (R2 variance = 87.54% and RMS = 0.167). The Tidal Form number (0.07) at Zaki’s Reef indicates a fully semidiurnal dominated tidal regime. Moreover, the Sa and Ssa constituents obtained from nearby stations made no improvements on tidal prediction results. Spectral analysis results of the white noise (residuals) from observed water surface elevation are dominated by daily frequency, suggesting that local wind plays a key role in circulation at study site. Local wind generated southerly long-shore and year-round offshore wind stress with a mean of?-0.36 & 0.35 , respectively. The persistent longshore and offshore currents help transport oil patches/spills, from the two nearby ports, away from the reef. Yet, offshore wind stress, pushing water away from the shore, may cause more exposure of the reef to extreme atmospheric conditions. We hypothesize that the repeated reef exposure to the combined effect of tides and offshore wind stress over many years may have played a key role in selecting and then enhancing corals ability, through training, to become more ad

关键词： Tides Red Sea Gulf of Suez Fringing Reef Wind Stress

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Seismic Imaging of Complex Structures in the Tarim Basin

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Journal of Earth Science 2015年第4期26卷 586-591页

作者： Ning Guo Chao Wu Stuart Fagin geo Tech Groups LLC Institute of Exploration and Development CPNCKorla geo Image Resources LLC

Conventional time imaging techniques are not capable of producing accurate seismic imaging of the subsurface in the mountain front of the Tarim Basin, China. Their imaged structures have led to some major drilling failures before, bearing a disrepute that ＂their structural closures have wheels and their structural highs have springs＂. This article first lists the imaging challenges, and explains in a schematic why the time imaging techniques fail in this area. Then through a series of real data examples, it demonstrates that when there exist lateral velocity variations, depth imaging is the only solution to tackle the imaging challenges in this area. Depth imaging accounts for the complexity of the wavefield, therefore produces superior and geological plausible images. The core task in properly performing depth imaging is building the velocity model. This article stresses some the main aspects in this regard.

关键词： time migration depth migration seismic image quality velocity model building anisotropy.

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Pollen and Spores from the Lower Cretaceous of Central Mongolia and Their Paleoclimatic Significance

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open Journal of geology 2019年第10期9卷 589-592页

作者： Nyamsambuu odgerel Niiden Ichinnorov Adiya Eviikhuu Batsuren Tegshbayar Department of geology and geophysics National University of Mongolia Ulaanbaatar Mongolia Institute of Paleontology and geology Mongolian Academy of Science Ulaanbaatar Mongolia Uyan geo Resource llc Ulaanbaatar Mongolia Sudalt Mana llc Ulaanbaatar Mongolia

The present study focuses on the Lower Cretaceous Khukhteeg Formation (Central Mongolia), which yields palynological assemblage that is used to understand the paleoclimate. Palynology samples from the Khovil opencast mine Choir-Nyalga Basin in the Central Mongolia have been analyzed for palynomorphs with SEM. The assemblage is dominated by pollen to conifers, such as Pinaceae, Podocarpaceae and Taxodiaceae, indicating the vegetation of conifer forests. The assemblage contains abundant spores Schizaeaceae, Cyatheaceae, which are generally associated with wet habitats. According to the detailed analyses, the plant community indicates that warm and humid subtropical paleoclimate controlled the study area during the Early Cretaceous.

关键词： Khovil opencast Mine Lower Cretaceous Khukhteeg Formation Spore Pollen Mongolia

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Land Suitability Evaluation for Agricultural Cropland in Mongolia Using the Spatial MCDM Method and AhP Based GIS

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Journal of geoscience and Environment Protection 2017年第9期5卷 238-263页

作者： Munkhdulam otgonbayar Clement Atzberger Jonathan Chambers D. Amarsaikhan Sebastian Bock Jargaltulga Tsogtbayar Institute of geography-geoecology Mongolian Academy of SciencesUlaanbaatarMongolia Institute of Surveying Remote Sensing and Land InformationDepartment of Landscape Spatial and Infrastructure ScienceUniversity of Natural Resources and Life SciencesViennaAustria Eng-geo Tech llc UlaanbaatarMongolia

The purpose of this study was to prepare a cropland suitability map of Mongolia based on comprehensive landscape principles, including topography, soil properties, vegetation, climate and socio-economic factors. The primary goal was to create a more accurate map to estimate vegetation criteria (above ground biomass AGB), soil organic matter, soil texture, and the hydrothermal coefficient using Landsat 8 satellite imagery. The analysis used Landsat 8 imagery from the 2016 summer season with a resolution of 30 meters, time series MoDIS vegetation products (MoD13, MoD15, MoD17) averaged over 16 days from June to August 2000-2016, an SRTM DEM with a resolution of 30 meters, and a field survey of measured biomass and soil data. In total, 6 main factors were classified and quality evaluation criteria were developed for 17 criteria, each with 5 levels. In this research the spatial MCDM (multi-criteria decision-making) method and AhP based GIS were applied. This was developed for each criteria layer’s value by multiplying parameters for each factor obtained from the pair comparison matrix by the weight addition, and by the suitable evaluation of several criteria factors affecting cropland. General accuracy was 88%, while PLS and RF regressions were 82.3% and 92.8%, respectively.

关键词： Land Suitability MCDM Boolean and Fuzzy Analysis AhP RF and PLS Regression

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Low-altitude geophysical magnetic prospecting based on multirotor UAV as a promising replacement for traditional ground survey

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geo-Spatial Information Science 2018年第1期21卷 67-74页

作者： Alexander V.Parshin Vladimir A.Morozov Anton V.Blinov Alexey N.Kosterev Alexander E.Budyak ore geology Lab Vinogradov Institute of Geochemistry SB RASIrkutskRussia SibGISTech llc MarkovaRussia geoinformatics Lab Irkutsk National Research Technical UniversityIrkutskRussia

The prospects for expanding the mineral resource base in many countries are linked with the exploration of stranded sites localized at unexplored areas with complex natural and landscape conditions that make any ground survey,including magnetic prospecting,difficult and *** current level of geology requires high-precision and large-scale data at the first stages of geological *** 2012,technologies of aeromagnetic surveying with unmanned aircraft vehicles(UAV)enter the market,but most of them are based on big fixed-wing UAV and do not allow to substantially increase the level of survey granularity compared with traditional aerial *** increase the scale of survey,it is necessary to reduce the altitude and speed of flight,for which the authors develop the methodical and technical solutions described in this *** obtain data at altitudes of 5 m above the terrain even in a rugged relief,we created heavy multirotor UAVs that are stable in flight and may be used in a wide range of environmental conditions(even a moderate snowfall),and develop a special software to generate flight missions on the basis of digital elevation models.A UAV has special design to reduce magnetic interference of the flight platform;the magnetic sensor is hung below the *** technology was conducted in a considerable amount of magnetic surveys in the mountainous regions of East Siberia between 2014 and *** results of the comparison between airborne and ground surveys are presented,which show that the sensitivity of the developed system in conjunction with low-altitude measurements can cover any geologically significant anomalies of the magnetic *** unmanned survey is cheaper and more productive;the multirotor-based technologies may largely replace traditional ground magnetic exploration in scales of 1:10,000−1:1000.

关键词： Unmanned aircraft vehicles(UAV) magnetic survey geophysical prospecting airborne geophysics unmanned aerial system(UAS)

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风城油田重油SAGD蒸汽腔微震监测

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地球物理学进展 2021年第1期36卷 237-249页

作者：桑林翔杨果于兵王怀武金鑫王建立杜明梁北援中国石油新疆油田分公司风城油田克拉玛依834000 北京科胜伟达石油科技股份有限公司北京100085 geoImage llc CO 80016USA

中国石油新疆油田分公司风城油田1845井区目前有13个井组正在实施蒸汽辅助重力泄油(SAGD).2018年12月至2019年4月期间,我们应用微破裂向量扫描对该井区实施了共35天的微震监测,试图定量确定热蒸汽腔的4D变化.由于微震活动的间歇性和跳跃... 详细信息

中国石油新疆油田分公司风城油田1845井区目前有13个井组正在实施蒸汽辅助重力泄油(SAGD).2018年12月至2019年4月期间,我们应用微破裂向量扫描对该井区实施了共35天的微震监测,试图定量确定热蒸汽腔的4D变化.由于微震活动的间歇性和跳跃性,一定期间的监测,很难用含震级或能量的震源分布对蒸汽腔实施解释;故,我们对监测域实施微震释放能量(或最小信噪比)的扫描,对域内各点逐时段(10 min)累积这个能量,结合域内测温等数据,统计分析微震强度相对于注汽线不同距离的平均几何分布.可能有三种SAGD诱发微震机制:热传导引起附加压应力场、微震弹性波传播扰动、及泄(注)液引起的体积变形;而微破裂又加剧了蒸汽腔边界延展和内部的微震活动.此期间井区注热蒸汽腔的状态是:注汽时长分别为2年多到5年多不等的三个井组的蒸汽腔边界(≥32 m)基本已接近或到达平均井组中线(35 m);实际可能两年内甚至注汽开始不久,这个边界即接近完成;以后除腔边界极缓慢地推进,主要注入能量是贡献于腔内微震"填空":在腔内缝间热传导产生的高温梯度子区引起的多重附加热压应力下间歇产生的微震活动.测温和产能数据支持上述结论.腔边界和腔内"填空"区域的时空变化是热蒸汽腔特性、也是重油生产决策的重要参数.这类监测解释方法也适用于任何注水前缘、矿山巷道安全、和断裂带的长期监测.

关键词：重油 SAGD 微地震蒸汽腔监测解释

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微地震及其监测综述——走向基于低信噪比的微破裂向量扫描

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地球物理学进展 2023年第1期38卷 47-75页

作者：梁北援常力房大志甘宇张军王建立冯彦军王文光郭炳平杜明王会卿扬英才 geoImage llc CA 94118USA 博瑞利恩能源科技发展(上海)有限公司上海201306 中国石化重庆页岩气有限公司重庆408400 江汉油田大宇石油技术开发潜江有限公司潜江433124 新疆煤田地质局一五六煤田地质勘探队乌鲁木齐830009 北京科胜伟达石油科技股份有限公司北京100085 中煤科工开采研究院有限公司北京100013 北京京援伟达技术有限公司北京100166

微地震是岩石的微小破裂.微地震的另一个重要特性是剪切破裂或具有很强的剪切破裂成分.通常人们感兴趣的是监测与生产生活密切相关的微震活动,为环保、安全、提高生产效率、以及一般地学科研提供参数和建议.观测微震信号,以及对其实施... 详细信息

微地震是岩石的微小破裂.微地震的另一个重要特性是剪切破裂或具有很强的剪切破裂成分.通常人们感兴趣的是监测与生产生活密切相关的微震活动,为环保、安全、提高生产效率、以及一般地学科研提供参数和建议.观测微震信号,以及对其实施的数理、地质、工程等的分析研究,构成整个微震监测系统.对此系统的每一步骤,从观测仪器研制、微震台网布设、微震记录的整理和去噪、微震或其释放能量分布的定位,到分析微震时空活动规律,以及这些规律与监测目标之间关联的解释,都必须从上述微震的两个特性出发.微震监测照搬常用勘探地震学和一般小震以上的天然地震学软硬件是不恰当的.微震监测方法的研发必须严格服从地震学基本原理并进行大量实验.本文对微震及其监测进行了一般综述,说明了由于微震的两个重要特性及其监测的艰难程度,也由于微震监测成为伴随生产生活的性价比较高的常规手段的需求,而不得不研发基于微小信噪比数据记录、实施地面监测的微破裂向量扫描技术,较详细地描述了其原理、微震仪器、台网布设原则、去噪、分析解释原则、和应用中所得到的重要分析结论,以及目前存在的技术问题和展望.

关键词：微地震监测非常规向量扫描

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Mapping essential urban land use categories in China(EULUC-China):preliminary results for 2018

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Science Bulletin 2020年第3期65卷 182-187页

作者： Peng Gong Bin Chen Xuecao Li han Liu Jie Wang Yuqi Bai Jingming Chen Xi Chen Lei Fang Shuailong Feng Yongjiu Feng Yali Gong hao Gu huabing huang Xiaochun huang hongzan Jiao Yingdong Kang Guangbin Lei Ainong Li Xiaoting Li Xun Li Yuechen Li Zhilin Li Zhongde Li Chong Liu Chunxia Liu Maochou Liu Shuguang Liu Wanliu Mao Changhong Miao hao Ni Qisheng Pan Shuhua Qi Zhehao Ren Zhuoran Shan Shaoqing Shen Minjun Shi Yimeng Song Mo Su hoi Ping Suen Bo Sun Fangdi Sun Jian Sun Lin Sun Wenyao Sun Tian Tian Xiaohua Tong Yihsing Tseng Ying Tu hong Wang Lan Wang Xi Wan Zongming Wang Tinghai Wu Yaowen Xie Jian Yang Jun Yang Man Yuan Wenze Yue hongda Zeng Kuo Zhang Neng Zhang Tao Zhang Yu Zhang Feng Zhao Yichen Zheng Qiming Zhou Nicholas Clinton Zhiliang Zhu Bing Xu Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Tsinghua Urban Institute Tsinghua UniversityBeijing 100084China Center for healthy Cities Institute for China Sustainable UrbanizationTsinghua UniversityBeijing 100084China Department of Land Air and Water ResourcesUniversity of CaliforniaDavisCA 95616-8627USA Department of geological and Atmospheric Sciences Iowa State UniversityAmesIA 50011USA State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China AI for Earth Laboratory Cross-Strait InstituteTsinghua UniversityBeijing 100084China International Institute for Earth System Sciences Nanjing UniversityNanjing 210093China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumchi 830011China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China National Engineering Laboratory for Applied Technology in Forestry&Ecology in South China College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004China College of Surveying&geo-Informatics Tongji UniversityShanghai 200092China Department of Urban Planning College of Architecture and Urban PlanningTongji UniversityShanghai 200092China Beijing Institute of Urban Planning Beijing 100045China Department of Urban Planning School of Urban DesignWuhan UniversityWuhan 430072China College of Earth Sciences Jilin UniversityChangchun 130061China Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Institute of Remote Sensing and geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of Urban and Regional Planning School of Geography and PlanningSun Yat-sen Univ

Land use reflects human activities on *** land use is the highest level human alteration on Earth,and it is rapidly changing due to population increase and *** areas have widespread effects on local hydrology,climate,biodiversity,and food production[1,2].however,maps,that contain knowledge on the distribution,pattern and composition of various land use types in urban areas,are limited to city *** mapping standard on data sources,methods,land use classification schemes varies from city to city,due to differences in financial input and skills of mapping *** address various national and global environmental challenges caused by urbanization,it is important to have urban land uses at the national and global scales that are derived from the same or consistent data sources with the same or compatible classification systems and mapping *** is because,only with urban land use maps produced with similar criteria,consistent environmental policies can be made,and action efforts can be compared and assessed for large scale environmental ***,despite of the fact that a number of urban-extent maps exist at global scales[3,4],more detailed urban land use maps do not exist at the same *** at big country or regional levels such as for the United States,China and European Union,consistent land use mapping efforts are rare[5,6](e.g.,https://***/open_land_use/).

关键词： EULUC-China 土地利用类型

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