ENSO物理过程

通过两个大气环流模式(GCM)的延长积分,来确定在ENSO过程中起作用的物理过程。第一个积分是用ECMWF T21大气模式的汉堡版本,强迫场是1970—1985年期间的全球海温(SST)。第二个积分是用普朗克研究所的热带太平洋模式,强迫场是1970—1985年的实测风应力。两个积分模拟出了1970—1985年期间观测到的热带海气系统的主要特征。     

Analytical model for computing residence times near a pumping well

An analytical solution for calculating the residence time of fluid flowing toward a pumping well in an unconfined aquifer has been developed. The analytical solution was derived based on a radial, steady-state, Dupuit-Forchheimer flow model. The resulting integral expression involved computing the imaginary error function, for which a simple series expansion is proposed. The validity of the analytical expression is demonstrated by testing its results against numerical results for an example problem. The analytical solution compared favorably with the numerical approximation.     

A three-dimensional analytical tool for modeling reactive transport

In this note, we present a public domain analytical reactive transport modeling tool (ART3D, version 2.0). The tool is developed in FORTRAN and can be used for solving a system of a set of partial differential equations coupled with a first-order reaction network. ART3D uses a novel analytic solution technique proposed by Clement. The new software includes options for performing Monte Carlo simulations and automated parameter estimation.