Numerics and subgrid-scale modeling in large eddy simulations of stratocumulus clouds [0.03%]
大涡模拟中数值与亚网格参数化在层云模拟中的作用
Kyle G Pressel,Siddhartha Mishra,Tapio Schneider et al.
Kyle G Pressel et al.
Stratocumulus clouds are the most common type of boundary layer cloud; their radiative effects strongly modulate climate. Large eddy simulations (LES) of stratocumulus clouds often struggle to maintain fidelity to observations because of th...
Changes in the structure and propagation of the MJO with increasing CO2 [0.03%]
二氧化碳浓度升高对MJO结构及传播的影响
Ángel F Adames,Daehyun Kim,Adam H Sobel et al.
Ángel F Adames et al.
Changes in the Madden-Julian Oscillation (MJO) with increasing CO2 concentrations are examined using the Goddard Institute for Space Studies Global Climate Model (GCM). Four simulations performed with fixed CO2 concentrations of 0.5, 1, 2, ...
L Trenary,T DelSole,M K Tippett et al.
L Trenary et al.
We propose a general methodology for determining the lagged ensemble that minimizes the mean square forecast error. The MSE of a lagged ensemble is shown to depend only on a quantity called the cross-lead error covariance matrix, which can ...
Coupling between lower-tropospheric convective mixing and low-level clouds: Physical mechanisms and dependence on convection scheme [0.03%]
对流混合与低层云的耦合：物理机制及依赖于对流方案的影响
Jessica Vial,Sandrine Bony,Jean-Louis Dufresne et al.
Jessica Vial et al.
Several studies have pointed out the dependence of low-cloud feedbacks on the strength of the lower-tropospheric convective mixing. By analyzing a series of single-column model experiments run by a climate model using two different convecti...
A decision tree algorithm for investigation of model biases related to dynamical cores and physical parameterizations [0.03%]
一种决策树算法：与动力核心及物理过程参数化相关的模式偏差研究
M Soner Yorgun,Richard B Rood
M Soner Yorgun
An object-based evaluation method using a pattern recognition algorithm (i.e., classification trees) is applied to the simulated orographic precipitation for idealized experimental setups using the National Center of Atmospheric Research (N...
Modeling the QBO-Improvements resulting from higher-model vertical resolution [0.03%]
关于QBO的模拟改进——来自更高垂直分辨率模式的结果
Marvin A Geller,Tiehan Zhou,D Shindell et al.
Marvin A Geller et al.
Using the NASA Goddard Institute for Space Studies (GISS) climate model, it is shown that with proper choice of the gravity wave momentum flux entering the stratosphere and relatively fine vertical layering of at least 500 m in the upper tr...
Impacts of parameterized orographic drag on the Northern Hemisphere winter circulation [0.03%]
参数化地形阻力对冬季北半球环流的影响
Irina Sandu,Peter Bechtold,Anton Beljaars et al.
Irina Sandu et al.
A recent intercomparison exercise proposed by the Working Group for Numerical Experimentation (WGNE) revealed that the parameterized, or unresolved, surface stress in weather forecast models is highly model-dependent, especially over orogra...
Evaluations of tropospheric aerosol properties simulated by the community earth system model with a sectional aerosol microphysics scheme [0.03%]
具备分段气溶胶微物理模块的社区地球系统模式对平流层气溶胶特性的模拟评估研究
Pengfei Yu,Owen B Toon,Charles G Bardeen et al.
Pengfei Yu et al.
A sectional aerosol model (CARMA) has been developed and coupled with the Community Earth System Model (CESM1). Aerosol microphysics, radiative properties, and interactions with clouds are simulated in the size-resolving model. The model de...
Hui Wan,Philip J Rasch,Mark A Taylor et al.
Hui Wan et al.
This paper evaluates the numerical convergence of very short (1 h) simulations carried out with a spectral-element (SE) configuration of the Community Atmosphere Model version 5 (CAM5). While the horizontal grid spacing is fixed at approxim...
Intercomparison of methods of coupling between convection and large-scale circulation: 2. Comparison over nonuniform surface conditions [0.03%]
非均匀下垫面条件下对流与大尺度环流耦合方法的比较研究
C L Daleu,R S Plant,S J Woolnough et al.
C L Daleu et al.
As part of an international intercomparison project, the weak temperature gradient (WTG) and damped gravity wave (DGW) methods are used to parameterize large-scale dynamics in a set of cloud-resolving models (CRMs) and single column models ...