In order to understand cloud clusters and a meso-a-scale low, which were observed on the China Continent on 29 June 1998, numerical experiments are performed with a model which intends to resolve mesoscale organized convection, the effects of cumulus convection being incorporated as the subgridscale. The horizontal grid size is taken to be about 5 km for the fine grid area of the triply-nested ...

Sensitive boundary condition dependence (BCD) is reported in a convectively unstable system with noise, where the amplitude of generated oscillatory dynamics in the downstream depends sensitively on the boundary value. This BCD is explained in terms of the decrease (relaxation) of the comoving Lyapunov exponent (characterizing the convective instability) from upstream to downstream [K. Fujimoto...

This paper investigates methods for quantifying convective weather delay reduction benefits for weather/ATM systems and recommends approaches for future assessments. This topic is particularly important at this time because: 1. Convective weather delays continue to be a dominant factor in the overall National Airspace System (NAS) delays, and 2. Benefits quantification and NAS performance asses...

The 12–13 June 2002 convective initiation case from the International H2O Project (IHOP_2002) field experiment over the central Great Plains of the United States is simulated numerically with the Advanced Regional Prediction System (ARPS) at 3-km horizontal resolution. The case involves a developing mesoscale cyclone, a dryline extending from a low center southwestward with a cold front closely...

The authors address the interannual signal in the tropical mean temperature of the free troposphere. This signal was shown by Soden to be well simulated by a wide range of general circulation models, given the observed sea surface temperature (SST) as a boundary condition. This suggests that the mechanism by which SST anomalies are communicated to the atmosphere might be understood simply as mo...

Heat conduction through eccentric systems with circular inner surface and regular polygonal outer surface has been analyzed. Constant wall temperature at the inner surface and convective heat transfer from the outer surface is considered. A two dimensional semi analytical method using boundary collocation technique is used in which collocation points are considered on the outer periphery of the...

where QT = R d×(0, T ) with T > 0 fixed, u : QT → R is the sough function, V : R → R is a (not necessarily divergence free) velocity field, f : R → R is the convective flux function, and A : R → R is the “diffusion” function. For the diffusion function the basic assumption is that A(·) is nonincreasing. This condition implies that (1.1) is a (strongly) degenerate parabolic problem. For example,...