نتایج جستجو برای: middle left 700 hpa
تعداد نتایج: 464655 فیلتر نتایج به سال:
Synoptic analysis of the torrential on Day 21, 1398 (Case study: Zahedan and Qeshm) Abstract Rainfall is the most important phenomenon or feature of the environment and so far many studies have been done about its causes. In any place, rainfall occurs when humid air and climbing cause are provided. Both of these conditions are provided by the circulation pattern. The study area is affe...
Monthly humidity (represented as dew point temperature, DWPT) data from 22 land and 5 island Australian upper-air sites were analysed, with trends estimated over the 1965–2017 period at four pressure levels. Humidity selected to ensure that collected under consistent sampling conditions used (‘modified data’). The quality control process involved examining station metadata applying an objective...
پسپردازش برونداد خام مدلهای مورد استفاده در پیشبینی عددی وضع هوا از گامهای اصلی و ضروری این نوع فرآیند پیشبینی است. در مراکز هواشناسی پیشرفته جهان برای پسپردازش برونداد مدلهای عددی، روشهای مختلفی به کار گرفته میشوند که غالباً بر پایه تحلیلها و محاسبات آماری استوارند. نظر به اهمیت موضوع، در این مقاله ابتدا روشهای متداول پسپردازش آماری دادههای خام مدلهای پیشبینی عددی وضع هوا مانند...
This study finds an increasing trend in the decay timescale (τ) of western North Pacific (WNP) tropical cyclone (TCs) making landfall on Asian continent from 1966–2018. Statistical analysis individual landfalling TCs shows that τ is significantly positively linked to soil wetness, 850-hPa relative vorticity and 200-hPa divergence, whereas it weakly correlated with 700–500-hPa humidity 850–200-h...
The typical precipitation processes in the pre-flood of South China and typhoons post-flood period have different water vapor transport characteristics. In this research, characteristics representative cases two circumstances were compared using fifth generation ECMWF reanalysis (ERA5) Late Run Integrated Multi-satellitE Retrievals for GPM (IMERG-L). channel process typhoon was stronger higher ...
Abstract Conventional observations of atmospheric rivers (ARs) over the northeastern Pacific Ocean are sparse. Satellite radiances affected by presence clouds and heavy precipitation, which impact their distribution in lower atmosphere precipitating areas. The goal this study is to document a data gap existing ARs Pacific, investigate how targeted field campaign called AR Reconnaissance (AR Rec...
The regional-to-synoptic-scale steering atmospheric circulation is important for advecting energy, mass, and momentum across space, with the near-surface wind being local manifestation of this circulation. winds can affect phenomena economic, ecological, and/or aesthetic values, such as bird migrations prescribed burns to restore habitats. purpose research classify days from 1979 2018 based on ...
The objective of this study is to determine the relationship between lightning observed by Tropical Rainfall Measuring Mission (TRMM) Lightning Imaging Sensor (LIS) and seven large-scale environmental variables obtained from 3-hourly Modern-Era Retrospective analysis for Research Application version 2 (MERRA-2) reanalysis in tropics subtropics. used are: convective available potential energy (C...
Vertical ozone profiles measured in the period 1996–2002 in the framework of the MOZAIC project (Measurement of Ozone and Water Vapor by Airbus in Service Aircraft) for flights connecting Central Europe to the Eastern Mediterranean basin (Heraklion, Rhodes, Antalya) were analysed in order to evaluate the high rural ozone levels recorded in the Mediterranean area during summertime. The 77 flight...
Dust storm is a natural hazardous phenomenon that affects arid and semi-arid regions of the world same as Iran. The present research aims to investigate formation synoptic patterns pervasive dust storms (PDSs) in southwestern For this purpose, daily data visibility less than 1000m 16 stations (Ilam Khuzestan provinces) were reviewed during 2004–2017, 59 PDSs with more 2 days duration (overlappe...
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