General relativistic numerical simulations of magnetized accretion flows around black holes show a disordered electromagnetic structure in the disk and corona and a highly relativistic, Poynting-dominated funnel jet in the polar regions. The polar jet is nearly consistent with the stationary paraboloidal Blandford-Znajek model of an organized field threading the polar regions of a rotating blac...

The paper presents the development of a simple stochastic model for the noise source of a round turbulent jet. The model is defined on a surface at the rotational/irrotational boundary of the jet and comprises a linear pressure event with random origin and random helical mode. The probability density function for the event’s axial origin is derived from the statistics of coherent structures in ...

ical data (water column profiles) for this undersampled HNLC region of the Southern Ocean. The data obtained is divided into four biogeochemical domains namely, Subtropical domain, the confluence of Subtropical and Sub-antarctic domains, the Polar Frontal zone (PFZ) and the northeastern branch of the Weddell Gyre. Each domain is discussed relative to its corresponding hydrography and biogeochem...

Abstract The extratropical effect of the quasi-biennial oscillation (QBO), known as Holton-Tan effect, is manifest aweaker, warmer winter Arctic polar vortex during east QBO phase. While previous studies have shown that signal caused by modified propagation planetary waves in stratosphere, mechanism dominating onset and seasonal development effects remains unclear. Here, governing wave-mean flo...

A Magneto Plasma Sail (MPS) produces a propulsive force by the interaction between the solar wind and an artificial magnetic field inflated by a plasma jet injection. Using a 2D hybrid PIC simulation code, the parametric study of magnetic inflation by the plasma jet injection is performed under different realistic parameters in terms of plasma material (Ar/Xe) and injection direction. We evalua...

Almost all climate models in Coupled Model Inter-comparison Project phase five (CMIP5) were found to have a cold bias in Sea Surface Temperature (SST) over the northern Arabian Sea, which is linked to the biases in the Indian Summer Monsoon (ISM). This cold SST bias was attributed to the anomalous cold winds from the north-western part of south Asian landmass during boreal winter. However, the ...

The Antarctic sea ice has undergone dramatic changes in recent years, with the highest recorded extent 2014 and lowest 2017. We investigated impacts of observed these two extremes conditions on atmospheric circulation Southern Hemisphere. conducted three numerical simulations different seasonal cycles forcings using Community Atmosphere Model Version 5: maximum (ICE_14), minimum 2017 (ICE_17), ...

The east-west striped pattern of clouds in Jupiter's weather layer is accompanied by a zonal flow containing 12 eastward-going jet streams alternating in latitude with westward-going jet streams. Based on theory, simulation and observations of the Earth's oceans and atmosphere, it is conjectured that Jupiter's weather layer is made of bands of constant potential vorticity (PV), where the interf...

Abstract Boreal summer extratropical intraseasonal oscillation (EISO) is crucial in modulating regional subseasonal variation and particularly causing extreme meteorological events, but it has yet to be well clarified operationally monitored. This study first objectively sorts out three dominant EISOs trapped along two westerly jet streams over Eurasia, then proposes the corresponding real-time...