نتایج جستجو برای: geopotential high at 500 hpa level

تعداد نتایج: 5424958  

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده علوم انسانی 1390

this study examined the effects of collaborative strategic reading and direct instruction in persuasion on iranian high school students persuasive writing and attitudes. students in three intact classes were assigned to one of three treatment conditions: collaborative strategic reading and direct instruction in persuasion or direct instruction in persuasion or a control group. treatment effects...

Journal: :Journal of Climate 2021

Abstract South Korea’s heat wave events over 39 years (1980–2018) were defined by spatiotemporal criteria, and their quantitative characteristics analyzed. The duration intensity of these ranked highest in 2016 2018. An examination synoptic conditions 2018 based on a reanalysis dataset revealed positive anomaly 500-hPa geopotential height, which could have induced warm the Korean Peninsula both...

Journal: :Climate Dynamics 2022

Here we examine the water stable-isotope data from Roosevelt Island Climate Evolution (RICE) ice core. is an independent rise located at northeastern margin of Ross Ice Shelf. In this study, use empirical orthogonal function (EOF) analysis to investigate relationship between RICE ice-core oxygen-18 isotopes (δ18O) and Southern Hemisphere atmospheric circulation during extended austral winter (A...

Journal: :International Journal of Climatology 2021

Extreme precipitation in the Northern French Alps are mainly associated with large-scale circulations (LSCs) bringing moist air from Atlantic Ocean and Mediterranean Sea—two atmospheric influences that very frequent climatology. In this work, we investigate what characterizes Atlantic/Mediterranean driving extreme comparison to ‘random’ circulations. We focus on 3-day over two medium size neigh...

Climatic geography of Tropical Cyclone hazards Affective on the southern coasts of Iran The occurrence of any climatic fringes, including annual tropical storms, leave irreparable risks in its dominated areas. Understanding these events and knowledge of the time of their occurrence can be helpful in managing the unexpected incidents caused by them. Tropical cyclones are important natural turbu...

Journal: :ecopersia 0
deeman ghaffari former master student of watershed management, department of rangeland and watershed management, malayer university, malayer, iran hamid nouri assistant professor of climatology, department of rangeland and watershed management malayer university, malayer, iran

the moisture flux convergence (mfc) and relative humidity in dusty days at different times and levels over the alvand mountain was investigated. the required basic data for the years 2009-2012, including relative humidity, visibility and synoptic codes, were gathered from hamadan synoptic station, while sea level pressure, uwind, vwind and specific humidity data were gathered from ncer/ncar sit...

2017
MINGHUA ZHENG EDMUND K. M. CHANG BRIAN A. COLLE YAN LUO YUEJIAN ZHU

This article introduces a method for objectively separating and validating forecast scenarios within a large multimodel ensemble for the medium-range (3–7 day) forecasts of extratropical cyclones impacting the U.S. East Coast. The method applies fuzzy clustering to the principal components (PCs) of empirical orthogonal function (EOF) analysis on mean sea level pressure (MSLP) from a 90-member c...

Journal: :Climate Dynamics 2022

This work demonstrates the potential of extreme cool-season precipitation forecasts in Arabian Peninsula (AP) at sub-seasonal time scales, identifies regions and periods forecast opportunity, investigates predictability synoptic-scale forcing scales. To this end, we simulate 18 events using convective-permitting Weather Research Forecasting (CP-WRF) model with lateral boundary from European Cen...

2006
Sergio M. Vicente-Serrano Nicolas Delbart Thuy Le Toan Manuela Grippa

[1] This paper analyses the role of the El Niño–Southern Oscillation (ENSO) on the interannual variability of the leaf appearance dates of boreal forests in the Northern Hemisphere (1982–2004). We find significant negative correlations between the ENSO, quantified by means of the Southern Oscillation Index (SOI), and the leaf appearance dates in central Siberia with up to 9 months lag. The corr...

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