搜索结果: 1-15 共查到“知识库 地球内部物理学”相关记录52条 . 查询时间(3.781 秒)
中国科学技术大学建立高温高压富水条件下岩石熔融温度测定新技术（图）
岩石熔融 温度测定 电导率突变 地球俯冲带
2022/9/16
近日，中国科学技术大学地球和空间科学学院教授倪怀玮研究团队通过实验技术创新，建立了用电导率突变在高温高压富水条件下原位确定岩石熔融温度的方法，为解决关于地球俯冲带熔融条件的争议奠定了基础。相关研究成果以Determination of the H2O-Saturated Solidus of Albite by Electrical Conductivity为题，发表在Journal of Geo...
地震波是探测地球内部结构的重要手段之一，基于走时数据的全球层析成像的结果已经获得了全球尺度的认识，其中最为显著的地震波速度结构是在非洲和太平洋板块下方的两个大尺度低速区。随着高性能计算机集群和并行算法的发展，复杂介质地震波谱元法数值模拟快速发展。新一代基于地震波波形的较高分辨率的全球波形层析成像得到了更加清晰、趋于统一的大尺度地幔结构（几百公里到千公里）。虽然更高分辨率（数公里到百公里）的小尺度结...
NG：地震各向异约束下的内核生长模式（图）
地震 各向异约束 内核生长模式
2023/1/14
地球内部广泛存在地震各向异性，其中地壳与地幔介质各向异性尤为显著(Crampin and Peacock, 2008；Silver, 1996)，而有关地核介质各向异性的研究较为鲜见。地核各向异性对理解内核的生长过程起着重要作用，将有助于理解“地球发电机”的演化模式。
远离板块边界的人类工业活动导致的诱发地震已经成为了一个引起广泛关注的全球性问题。过去的主流观点认为与水力压裂和注水行为相关的诱发地震的机理为潜在活动断层内部孔隙压力的升高导致的断层抗剪强度的降低(Guglielmi et al., 2015; Rubinstein and Mahani, 2015; Weingarten et al., 2015)，比如美国中部大陆的诱发地震活动，但这种机制不适用...
NG: 上地幔的碳含量与熔融深度正相关（图）
上地幔 碳含量 熔融深度 正相关
2023/1/14
上地幔部分熔融控制着地球内部热演化、挥发份输送到大气圈的通量及地幔地球化学与地球物理属性等（Dasgupta et al., 2013）。碳在地球内部以多种形式存在，包括存在于岩浆、流体和矿物晶格中等，与上地幔的熔融行为密切相关（Aiuppa et al., 2021）。固体地球深部的碳元素通过休眠或喷发期的火山脱气作用，主要以二氧化碳的形式释放至地表的大气圈，从而控制着地球内部与表层系统的长时间...
HTI煤层介质槽波波场与频散特征初步研究
煤层 HTI介质 Love槽波 频散
2019/2/27
煤层内裂隙较为发育，具有明显的各向异性.目前槽波理论研究以各向同性介质为主，对HTI介质中槽波及其频散性质研究很少.本文以弱各向异性、含垂直裂隙HTI煤层介质为研究对象，研究了HTI煤层介质中的三维槽波波场，采用交错网格高阶有限差分法模拟槽波，推导了三层水平层状HTI煤层介质的Love型槽波理论频散公式和振幅深度分布，分析了HTI各弹性参数对频散曲线的影响.HTI介质和各向同性介质基阶Love槽波...
Effects of transient water mass redistribution associated with a tsunami wave on Earths pole path
arth rotation pole path variation tsunami wave Sumatra earthquake
2015/9/2
We have quantified the effects of a water mass redistribution associated with the propagation of a tsunami wave
on the Earths pole path and on the Length-Of-Day (LOD) and applied our modeling results...
The seismic microzonation of level 3 of Sant’Agata Fossili (northern Italy) based on a multidisciplinary approach
Seismic microzoning Amplification factors Elastic acceleration response spectra
2015/8/17
In this paper the results of a detailed seismic microzonation, performed at Sant’Agata Fossili (Piemonte region, northern Italy) are presented. We study the local seismic response of this small villag...
An analytical verification test for numerically simulated convective flow above a thermally heterogeneous surface
simulated convective fl ow analytical verifi cation test
2015/8/6
An analytical solution of the Boussinesq equations for the motion of a viscous stably stratified fluid driven
by a surface thermal forcing with large horizontal gradients
(step changes) ...
Photochemical grid model implementation and application of VOC, NOx, and O3 source apportionment
model implementation application
2015/3/5
. For the purposes of developing optimal emissions
control strategies, efficient approaches are needed to identify the major sources or groups of sources that contribute to
elevated ozone (O3/...
An evaluation of ambient ammonia concentrations over southern Ontario simulated with different dry deposition schemes within STILT-Chem v0.8
ambient ammonia concentrations southern Ontario
2014/12/18
A bidirectional air–surface exchange scheme for
atmospheric ammonia was incorporated into the Stochastic Time-Inverted Lagrangian Transport air quality model
(STILT-Chem v0.8). STILT-Chem v0.8 was t...
Effects of metal ions and pH on the formation and decomposition rates of di- and tri-peptides in aqueous solution
salt-induced peptide formation metal ions copper (II) complex with glycine hydrothermal system prebiotic chemistry, origin of life
2017/4/11
The recent discovery of active deep-sea hydrothermal systems venting high-pH fluids suggests that the prebiotic chemistry
of the hydrothermal systems of early Earth may have been more diverse than pr...
极涡崩溃是平流层大气环流一个重要的变化过程,本文利用31年的再分析资料研究了南半球平流层极涡崩溃早晚年的异常特征.研究结果表明,南半球平流层极涡崩溃偏早年极涡崩溃前后平流层环流场异常表现为整层一致的变化,即都为正温度异常、正位势高度异常和负纬向风异常;而南半球平流层极涡崩溃偏晚年极涡崩溃前后平流层环流场异常的整层一致性的变化不典型,而在符号上与极涡崩溃偏早年的异常相反.与北半球平流层极涡崩溃前后环...
本文通过背斜褶皱变形与低温热年代学年龄(磷灰石和锆石(U-Th)/He、磷灰石裂变径迹)端元模型研究,约束低起伏度、低斜率地貌特征的四川盆地南部地区新生代隆升剥露过程.四川盆地南部沐川和桑木场背斜地区新生代渐新世-中新世发生了相似的快速隆升剥露过程(速率为~0.1 mm/a、现今地表剥蚀厚度1.0~2.0 km),反映出盆地克拉通基底对区域均一性快速抬升冷却过程的控制作用.川南沐川地区磷灰石(U-...
Scattering characteristics of high-resolution meteor head echoes detected at multiple frequencies
multiple frequencies high-resolution meteor head
2017/3/22
Meteor data collected at the Kwajalein Missile Range (KMR) during the peak of the
1998 Leonid storm comprise the only simultaneous observations of meteor head echoes
and trails using seven frequenci...