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西藏及西南三江深断裂构造格局新认识
怒江 深断裂 重磁场特征
2014/12/31
西藏和西南三江地区是青藏地区断裂构造最为复杂区域,历经数十年研究,对该区断裂构造的认识仍存在分歧.笔者以最新实测航磁数据并结合重力资料为基础,从重、磁场特征与地质构造研究相结合角度出发,新编制了西藏及西南三江地区的断裂构造格架图.研究结果表明,在西南三江流域的金沙江深断裂、澜沧江深断裂和怒江深断裂自南向北西延伸,没有与西藏地区的近东西向断裂呈弧形连接,而是一组独立存在的北西向断裂,这是在特提斯断裂...
基于AVO反演的频变流体识别方法
流体项 谱分解 先验信息
2014/12/31
研究表明流体引起衰减与频散往往表现为频变AVO现象.一些频散地震属性,例如纵波频散,已经证实为可靠的碳氢指示因子.为了更有效地识别流体,基于f-μ-ρ近似构建了新的流体因子Df,即频变流体项.该属性的反演首先需要连续小波变换(CWT)谱分解得到不同频带地震数据,通过去相关与先验约束来保证反演结果可靠性.模型试算证实了频变反射系数近似公式的精度可靠性,Df可以识别出强衰减介质所引起的频散现象.实际数...
基于入射角的两项流体阻抗反演方法
入射角方程 贝叶斯理论 小角度反演
2014/12/19
本文在孔隙弹性介质理论的指导下,基于入射角AVO近似方程推导了包含Russell流体项的两项AVO近似方程和相应的弹性阻抗方程,通过分析可知其精度符合反演要求.在贝叶斯理论框架下,建立了包含正则化约束的弹性阻抗反演方法,在此基础上直接提取Russell流体项.该方法可在缺少大角度叠前地震资料的情况下进行叠前直接反演得到流体因子,减少传统方法带来的累积误差.模型试算表明,该方法具有较好的准确度和稳定...
Evaluation of North Eurasian snow-off dates in the ECHAM5.4 atmospheric general circulation model
atmospheric general circulation model North Eurasian snow-off dates
2014/12/19
The timing of springtime end of snowmelt (snow-off date) in northern Eurasia in version 5.4 of the ECHAM5 atmospheric general circulation model (GCM) is evaluated through comparison with a snow-off da...
DYPTOP: a cost-efficient TOPMODEL implementation to simulate sub-grid spatio-temporal dynamics of global wetlands and peatlands
global wetlands peatlands
2014/12/19
Simulating the spatio-temporal dynamics of inundation is key to understanding the role of wetlands under past and future climate change. Earlier modelling studies have mostly relied on fixed prescribe...
A Lagrangian advection scheme with shape matrix (LASM) for solving advection problems
solving advection problems Lagrangian advection scheme
2014/12/19
A new Lagrangian advection scheme with shape matrix (LASM) is proposed to take advantage of the extreme low numerical diffusion of the Lagrangian methods. The tracer is discretized into finite parcels...
Predicting the response of the Amazon rainforest to persistent drought conditions under current and future climates: a major challenge for global land surface models
major challenge global land surface models
2014/12/19
While a majority of global climate models project drier and longer dry seasons over the Amazon under higher CO2 levels, large uncertainties surround the response of vegetation to persistent droughts i...
Coupling the high-complexity land surface model ACASA to the mesoscale model WRF
high-complexity land surface model mesoscale model WRF
2014/12/19
In this study, the Weather Research and Forecasting (WRF) model is coupled with the Advanced Canopy–Atmosphere–Soil Algorithm (ACASA), a high-complexity land surface model. Although WRF is a state-of-...
Tropical troposphere to stratosphere transport of carbon monoxide and long-lived trace species in the Chemical Lagrangian Model of the Stratosphere (CLaMS)
Tropical troposphere long-lived
2014/12/19
Variations in the mixing ratio of trace gases of tropospheric origin entering the stratosphere in the tropics are of interest for assessing both troposphere to stratosphere transport fluxes in the tro...
The North American Carbon Program Multi-scale Synthesis and Terrestrial Model Intercomparison Project – Part 2: Environmental driver data
The North American Carbon Program Multi-scale Synthesis Terrestrial Model Intercomparison Project – Part 2
2014/12/19
Ecosystems are important and dynamic components of the global carbon cycle, and terrestrial biospheric models (TBMs) are crucial tools in further understanding of how terrestrial carbon is stored and ...
Sensitivity of simulated CO2 concentration to regridding of global fossil fuel CO2 emissions
fossil fuel CO2 emissions
2014/12/19
Errors in the specification or utilization of fossil fuel CO2 emissions within carbon budget or atmospheric CO2 inverse studies can alias the estimation of biospheric and oceanic carbon exchange. A ke...
Evaluation of the ECHAM family radiation codes performance in the representation of the solar signal
ECHAM family radiation codes solar signal
2014/12/19
Solar radiation is the main source of energy for the Earth's atmosphere and in many respects defines its composition, photochemistry, temperature profile and dynamics. The magnitude of the solar irrad...
The spectral element method (SEM) on variable-resolution grids: evaluating grid sensitivity and resolution-aware numerical viscosity
spectral element method variable-resolution grids
2014/12/19
We evaluate the performance of the Community Atmosphere Model's (CAM) spectral element method on variable-resolution grids using the shallow-water equations in spherical geometry. We configure the met...
A skill assessment of the biogeochemical model REcoM2 coupled to the Finite Element Sea Ice朞cean Model (FESOM 1.3)
biogeochemical model REcoM2 Finite Element Sea Ice朞cean Model
2014/12/19
In coupled biogeochmical杘cean models, the choice of numerical schemes in the ocean circulation component can have a large influence on the distribution of the biological tracers. Biogeochemical...
Corrigendum to “Decoupling the effects of clear atmosphere and clouds to simplify calculations of the broadband solar irradiance at ground level” published in Geosci. Model Dev., 7, 1661–1669, 2014
clear atmosphere simplify calculations of the broadband solar irradiance
2014/12/19
Due to an oversight in the production process, the wrong
Fig. 2 was inserted into the manuscript. The correct figure
with its caption can be seen below.