精细化地震海啸波流实时预警系统研究与应用     

任智源  侯京明  王培涛  李涛  原野  赵联大 《海洋学报》2019,41(9):145-155

基于Okada模型和非线性浅水波模型，结合高精度多层嵌套网格针对我国浙江沿海的温州和台州地区建立了越洋–近海–局部的精细化地震海啸波流实时预警系统，近岸的分辨率为900 m。该预警系统包括了并行化的数值计算模块，基于Python 2D绘图库的计算结果可视化处理模块，以及通过Python语言将所有经过数值计算的图形与动画产品集成在一个网页上的产品集成模块。一旦地震发生，该系统可根据地震的震源参数信息在10 min内完成数值计算、可视化处理，以及产品集成。选取2011年日本东北9.0级地震海啸结合实测数值对该系统进行模拟验证，进一步应用该系统模拟计算了日本南海海槽和琉球海沟潜在极端海啸的影响规律。结果表明，该预警系统可有效地提高地震海啸实时预警的时效性和准确度，为海啸的预警、减灾，以及辅助决策提供科学依据。  相似文献   

Erratum to: Decadal variation of surface solar radiation in the Tibetan Plateau from observations, reanalysis and model simulations     

Qinglong You  Arturo Sanchez-Lorenzo  Martin Wild  Doris Folini  Klaus Fraedrich  Guoyu Ren  Shichang Kang 《Climate Dynamics》2013,40(7-8):2087-2087

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Isogeometric finite element analysis of poroelasticity     

Faisal Irzal  Joris J. C. Remmers  Clemens V. Verhoosel  René de Borst 《国际地质力学数值与分析法杂志》2013,37(12):1891-1907

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金乡县采煤塌陷地现状及治理对策     

任淑霞  张建霞  董玉 《山东国土资源》2009,25(7):3-4

随着煤炭工业的发展，煤炭资源开采的采空区逐年增多，大面积土地塌陷，大量农用土地遭到破坏，平地成为湖泊，农田不能耕作，土壤质量不断下降，生态环境恶化严重。因此搞好土地复垦和生态环境治理，不仅是利在当代，造福子孙的大事，也是实现国民经济和社会可持续发展的基础和保证。  相似文献   

The Distribution of Dissolved Aluminum in the Yellow and East China Seas   总被引：2，自引：0，他引：2  

LI Jianbing REN Jingling ZHANG Jing LIU Sumei 《中国海洋大学学报(英文版)》2008,7(1):48-54

Water samples containing dissolved aluminum were collected from the Yellow and East China Seas in October-November 2000. The average concentrations of dissolved AI in the Yellow Sea （YS） and East China Sea （ECS） were 0.042 and 0.056 μ molL^-1, respectively. The concentration of dissolved aluminum decreased gradually across the continental shelf. The lower concentrations appeared in the YS cold water center and in the bottom layer at the shelf edge of the ECS, where they were 0.016 and 0.011 μmolL^-1, respectively. The distribution of dissolved Al was controlled by physical mixing processes rather than biological uptake processes. The impact of different water masses along the PN transect was calculated based on the mass balance model. The results show that the impact of the Changjiang River was mainly concentrated on the coastal area and the top thermocline water on the ECS shelf, where the impact percentage decreased from 12.6% to 1.1% in the surface water, while the contribution of the Kuroshio water was dominant on the ECS shelf in this survey, increasing from 77.6% to 97,8% along the PN transect from the Changjiang River Estuary to the Ryukyu Islands. It is concluded that aluminum can serve as a proper tracer for studying the impact of Changjiang terrestrial matter on the ECS shelf water.  相似文献   

Coal facies evolution of the main minable coal-bed in the Heidaigou Mine,Jungar Coalfield,Inner Mongolia,northern China     

Dai  ShiFeng  Ren  DeYi  Li  ShengSheng  Zhao  Lei  Zhang  Yong 《中国科学:地球科学(英文版)》2007,50(2):144-152

The No. 6 Coal-bed from the Heidaigou Mine, Jungar Coalfield, Inner Mongolia is a super-large Ga deposit. The dominant carrier of Ga is boehmite in coal. The study of coal facies may provide genetic enrichment information of Ga and its carrier (boehmite) in the Ga deposit. On the basis of study on coal petrology and mineralogy, it was found that the No. 6 Coal-bed from the Heidaigou Mine of Jungar was enriched in inertinites and the microlitho-types were dominated by clarodurite. The maceral morphological features and association indicate that the coal-bed was formed in a dry sedimentary environment or in a periodic dry sedimentary environment caused by the alternating variations of groundwater level. The optimum conditions for the enrichment of Ga and its particular carrier (boehmite) were dominated by four transitional conditions: (1) the upper delta plain which was the transitional zone between alluvial and lower delta plains, (2) the transitional zone between the dry and wet forest swamps, being slightly apt to the dry one, (3) the transitional tree density between the thick and loose ones, and (4) the low moor that was the transitional zone between two high moors during peat accumulation.

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Comparative study on rain splash erosion of representative soils in China   总被引：5，自引：0，他引：5  

Qinjuan Cheng  Qiangguo Cai  Wenjun Ma 《中国地理科学(英文版)》2008,18(2):155-161

As the first event of soil erosion, rain splash erosion supplies materials for subsequent transportation and entrainment. The Loess Plateau, the southern hilly region and the Northeast China are subject to serious soil and water loss; however, the characteristics of rain splash erosion in those regions are still unclear. The objectives of the study are to analyze the characteristics of splash erosion on loess soil, red soil, purple soil and black soil, and to discuss the relationship between splash erosion and soil properties. Soil samples spatially distributed in the abovementioned regions were collected and underwent simulated rainfalls at a high intensity of 1.2mm/min, lasting for 5, 10, 15, and 20min, respectively. Rain splash and soil crust development were analyzed. It shows that black soil sample from Heilongjiang Province corresponds to the minimum splash erosion amount because it has high aggregate content, aggregate stability and organic matter content. Loess soil sample from Inner Mongolia corresponds to the maximum splash erosion amount because it has high content of sand particles. Loess soil sample from Shanxi Province has relatively lower splash erosion amount because it has high silt particle content and low aggregate stability easily to be disrupted under rainfalls with high intensity. Although aggregate contents of red soil and purple soil samples from Hubei and Guangdong provinces are high, the stability is weak and prone to be disrupted, so the splash erosion amount is medium. Splash rate which fluctuates over time is observed because soil crust development follows a cycling processes of formation and disruption. In addition, there are two locations of soil crust development, one appears at the surface, and the other occurs at the subsurface.  相似文献   

Export stoichiometry and migrant-mediated flux of phosphorus in the North Pacific Subtropical Gyre     

Cecelia C.S. Hannides  Michael R. Landry  Claudia R. Benitez-Nelson  Renée M. Styles  Joseph P. Montoya  David M. Karl 《Deep Sea Research Part I: Oceanographic Research Papers》2009,56(1):73-88

Export processes play a major role in regulating global marine primary production by reducing the efficiency of nutrient cycling and turnover in surface waters. Most studies of euphotic zone export focus on passive fluxes, that is, sinking particles. However, active transport, the vertical transfer of material by migrating zooplankton, can also be an important component of carbon (C) and nitrogen (N) removal from the surface ocean. Here we demonstrate that active transport is an especially important mechanism for phosphorus (P) removal from the euphotic zone at Station ALOHA (Hawaii Ocean Time-series program; 22°45′N, 158°W), a P-stressed site in the North Pacific Subtropical Gyre. Migrant excretions in this region are P-rich (C₅₁:N₁₂:P₁) relative to sinking particles (C₂₅₀:N₃₁:P₁), and migrant-mediated P fluxes are almost equal in magnitude (82%) to P fluxes from sediment traps. Migrant zooplankton biomass and therefore the importance of this P removal pathway relative to sinking fluxes has increased significantly over the past 12 years, suggesting that active transport may be a major driving force for enhanced P-limitation of biological production in the NPSG. We further assess the C:N:P composition of zooplankton size fractions at Station ALOHA (C₈₈:N₁₈:P₁, on average) and discuss migrant-mediated P export in light of the balance between zooplankton and suspended particle stoichiometries. We conclude that, because active transport is such a large component of the total P flux and significantly impacts ecosystem stoichiometry, export processes involving migrant zooplankton must be included in large-scale efforts to understand biogeochemical cycles.  相似文献   

济阳坳陷新生代地温场特征研究     

韩立国  柳忠泉  徐佑德  许世红  任凤楼  周丽 《海洋地质译丛》2008,(1):19-25

为了找出济阳坳陷内各凹陷成烃演化与古热场间的关系,综合应用镜质体反射率法和磷灰石裂变径迹法恢复了济阳坳陷新生代地温演化历史,结果表明济阳坳陷古地温梯度在新生代是逐渐降低的,其中古近纪比新近纪下降的幅度大;同时济阳坳陷内各凹陷的古地温梯度演化也存在差异,特别是古近纪末期的东营构造运动后,各凹陷的地温梯度演化差异更加明显;根据各凹陷的古热场恢复,新近纪以来东营凹陷的古地温最高,其次是沾化凹陷、惠民凹陷和车镇凹陷;烃源岩的生烃演化历史与其经历的古热场密切相关,古热场越高的地区,烃源岩进入生烃门限的深度就越浅、时间越早。  相似文献   

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任锴  杨力  赵庆海 《大地测量与地球动力学》2009,29(5):125-128

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