Abstract. The Northeast Greenland Ice Stream (NEGIS) is the largest active ice stream on Sheet (GrIS) and a crucial contributor to ice-sheet mass balance. To investigate ice-stream dynamics gain information about past climate, deep core drilled in upstream part of NEGIS, termed East Ice-core Project (EastGRIP). Upstream flow can introduce climatic bias into cores through advection deposited und...

Island thermal effects on the trail cloud band over the central North Pacific are investigated for the lee of Hawaii using satellite observations and a regional atmospheric model. The trail cloud band develops around noon and peaks in cloudiness in the early afternoon. The analysis of numerical simulations of the Kauai wake suggests that a dynamically induced convergence zone forms in the lee o...

in this research energetics of the barotropic and baroclinic development for two planetary waves over eastern mediterranean, syria and west of iran and their interaction with surface cyclones were investigated. ahmadi-givi et al. (1384) calculated and examined several selected important terms in the eddy kinetic energy (eke) tendency equation during life cycle of six troughs that were developed...

A partitioned implicit-explicit orthogonal Runge-Kutta method (PIROCK) is proposed for the time integration of diffusion-advection-reaction problems with possibly severely stiff reaction terms and stiff stochastic terms. The diffusion terms are solved by the explicit second order orthogonal Chebyshev method (ROCK2), while the stiff reaction terms (solved implicitly) and the advection and noise ...

Explosive cyclones (ECs) pose serious challenges for weather forecasting and significant threats to human life property. In searching the key points that make a cyclone go through explosive deepening off East Asian coast, we present comparative analysis of ECs nonexplosive (or ordinary cyclones; OCs) using 10 years ERA5 reanalysis data with high temporal spatial resolutions. Their differences i...

In most combustion devices, the Mach number is small, and the most efficient computational approach is the solving of the low-Mach number formulation of the Navier-Stokes equations. In this approach, the acoustic waves propagate at an infinite speed. Nevertheless, when the acoustic speed plays an important role, as in the formation of instabilities, the compressible Navier-Stokes equations must...

The shallow atmospheric fronts that develop in the early winter along the east coast of North America have been attributed, in various modeling and observational studies, to the land–sea contrasts in both surface heating and friction. However, typical synoptic conditions are such that these ‘‘coastal’’ fronts could also be a type of upstream influence by the Appalachian Mountain chain. Generali...

background: sperm preparation is a fundamental step in art and attempt for developing new methods to be continued. objective: to evaluate the efficacy of upstream method for separation of human spermatozoa and its effects on sperm parameters including: motility morphology and concentration. materials and methods: semen samples from 17 men who referred to infertility clinic for evaluating their ...

A partitioned implicit-explicit orthogonal Runge-Kutta method (PIROCK) is proposed for the time integration of diffusion-advection-reaction problems with possibly severely stiff reaction terms and stiff stochastic terms. The diffusion terms are solved by the explicit second order orthogonal Chebyshev method (ROCK2), while the stiff reaction terms (solved implicitly) and the advection and noise ...

In the past most diagnostic studies of frontal cyclone development have been carried out through use of quasigeostrophic models. In this paper we present the results of vertical motions obtained from a 5-level general balance model. Nongeostrophic effects such as deformation and beta term of the balance equations, divergence, vertical advection, and the twisting term of the complete vorticity e...