نتایج جستجو برای: 500 hpa geo

تعداد نتایج: 106780  

2006
E. Zehe A. K. Singh

Within the present study we shed light on the question whether objective circulation patterns (CP) classified from either the 500 HPa or the 700 HPa level may serve as predictors to explain the spatio-temporal variability of monsoon rainfall in the Anas catchment in North West India. To this end we employ a fuzzy ruled based classification approach in combination with a novel objective function...

Journal: :Frontiers in Earth Science 2021

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...

2012
R. S. Gao J. Ballard L. A. Watts T. D. Thornberry S. J. Ciciora R. J. McLaughlin D. W. Fahey

In situ measurements of atmospheric ozone (O3) are performed routinely from many research aircraft platforms. The most common technique depends on the strong absorption of ultraviolet (UV) light by ozone. As atmospheric science advances to the widespread use of unmanned aircraft systems (UASs), there is an increasing requirement for minimizing instrument space, weight, and power while maintaini...

ژورنال: فیزیک زمین و فضا 2011
زهرا شرعی‌پور

در این مقاله، همبستگی بین اُزن کلی (Total ozone) و ارتفاع ژئوپتانسیلی (Meteorological parameters) و دمای جوٌ بالا (Upper air) برای سه ایستگاه تهران، آنکارا و بت داگان (Bet Dagan) واقع در منطقه خاورمیانه در دوره سه ماه سرد ژانویه، فوریه و مارس در سال‌های 2005 ، 2007 و 2008 بررسی شده است. داده‌های جوٌ بالا مربوط به دانشگاه وایومینگ و داده‌های اُزن مربوط به داده‌های ماهواره است. نتایج بررسی ضرایب ه...

حنفی, علی , عزیزی, قاسم ,

Estimation of probable maximum precipitation (PMP) is recognized as practical researches in which is taking into consideration by hydrologists in relation to designing the great structures of hydraulic in particular dams. In this study, synoptic method is used in order to estimate probable maximum precipitation in the Ajichai catchment. The meteorological data related from 40 synoptic and clima...

ژورنال: فیزیک زمین و فضا 2014
A Hanafi A Ranjbar SaadatAbadi E Mirzaei GH Azizi J Masoompour Samakosh M Soltani Y Yousefi

Heavy precipitation plays a significant role in arid and semi-arid regions of Iran. In order to understand the effect of blocking high system on rainfalls in northwest Iran during 25 - 28 October 2008, meteorological conditions including pressure, wind fields and temperature at multiple levels of the atmosphere were analyzed. Sea level pressure, the 1000-500 hPa thickness, perceptible water, re...

  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...

Ahvaz can be regarded as one of the most polluted cities in the world in terms of air pollution. Successive years of drought and weather conditions in recent years have resulted in particulate matter (PM10) concentration in Ahvaz. In this study, using probability distribution techniques, an appropriate threshold to identify the PM10 maximum extreme concentrations (MEC) has been detected. Based ...

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