نتایج جستجو برای: latitude low pressure weather system can cause strong tropospheric mixing

تعداد نتایج: 5733805  

2010
Gang Chen R. Alan Plumb Jian Lu

[1] Sensitivities of tropospheric winds and stratospheric Brewer‐Dobson Circulation (BDC) to SST warming are explored in an aqua‐planet atmospheric general circulation model. The tropospheric zonal wind change is quite sensitive to the location and sign of the gradient of SST perturbations with respect to the climatological jet. For the experiments with low latitude warming, the Hadley cell is ...

Journal: :International Journal of Climatology 2021

Abstract Relative contributions to the zonal mean meridional heat transport by climatological annual mean, variation, synoptic, intra‐seasonal and lower‐frequency motions were examined based on ERA‐Interim reanalysis data for period of 1981–2015. The analysed in this study only includes component related wind temperature. In tropics, circulations dominate long‐term transport, while interaction ...

Background and objectives: The kidneys of chronic kidney disease (CKD) patients do not have enough function and hemodialysis (HD) is a common procedure for their treatment. HD requires vascular access surgery (VAS) and arteriovenous fistula (AVF) is a low-complication method in VAS. However, different rates of AVF failure have been reported worldwide which can cause repeating s...

2016
Jessica Vial Sandrine Bony Jean-Louis Dufresne Romain Roehrig

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 convective parametrizations, this study elucidates the physical mechanisms through which marine boundary-layer clouds depend on this mixing in the present-day climat...

بلیانی, سعید, سلیقه, محمد,

The results of this study indicated that the synoptic patterns that lead to heavy rainfall in 22 March 1996, 24 mar 1995 and 17 November 1994 in the northern portion of FARS province includes: the low pressure that located in eastern part of Mediterranean and Black sea and southern part of Caspian Sea that created by trough that located at the middle level of atmosphere. In addition to this low...

Journal: :IEEE Access 2023

Tropical cyclones (TC) are extreme weather conditions caused by severe circular storms that originate in warm oceans. They strong destructive forces cause disastrous effects on human life and property, lead to economic damage. Therefore, it is necessary forecast the TC intensity avoid issues. This study proposes a using Long-Short Term Memory (LSTM) with Cat Swarm Optimization (CSO). The LSTM m...

Journal: :Remote Sensing 2022

A strong convective storm is a disastrous weather system with small spatio-temporal scale. It often occurs suddenly and can cause huge disasters. Thus, it necessary to improve the forecast accuracy of storms. Overshooting cloud top (OT) product updrafts in storms, which penetrate tropopause enter lower stratosphere. OT closely related severe influence water vapor transport material exchange bet...

Ali Reza Azmoudeh Ardalan Marzieh Jafari

In this paper a practical method for tropospheric effects on GPS derived coordinates in absolute mode is presented. GPS observations at the permanent GPS stations can be used as source of information for the modeling. The developed model is a time-dependent model and as such differs from usual tropospheric models, which are based on atmospheric parameters, i.e. temperature, pressure and humidit...

2014
GREGOR MÖLLER ROBERT WEBER

The troposphere blind model RTCA MOPS is the minimum operational performance standard for global positioning systems. With a standard deviation of 2.3% of the ZTD, it enables us to mitigate the main part of the tropospheric effect on GNSS signals. Nevertheless, the comparison of RTCA MOPS with modern troposphere models like the ESA model or GPT2 shows the limitation of RTCA MOPS and points out ...

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