نتایج جستجو برای: مدل wrf

تعداد نتایج: 122703  

ژورنال: :فیزیک زمین و فضا 2011
مهران خدامرادپور پرویز ایران نژاد سهراب حجام

امروزه طرحواره های پارامترسازی سطح به منزلة یکی از مهم ترین مولفه ها در مدل های گردش کلی جوً و پیش بینی عددی وضع هوا مطرح اند. این طرحواره ها تبادل تکانه، جرم و انرژی بین سطح و جوً را برآورد می کنند. رواناب یکی از مهم ترین مولفه های چرخه آبی طرحواره های سطح خشکی ها است که پارامترسازی آن به دلیل پیچیدگی فرایندهای حاکم بر ایجاد آن و وابسته بودن این فرایندها به زمان و مکان دشوار است. در این بررسی طر...

ژورنال: اکوبیولوژی تالاب 2018
آزادی, مجید, جمشیدی خزلی, تورج, فتاحی, ابراهیم, کریم خانی, مهناز,

باوجود پیشرفت قابل‌توجه مدل‌های پیش‌بینی عددی وضع هوا، هنوز پیش‌بینی دقیق بارش چالش‌برانگیز است. با توجه به اهمیت دقت پیش‌بینی بارش در هیدرولوژی و پیش‌بینی سیلاب، در این تحقیق جهت نشان دادن اثر تفکیک افقی بر روی دقت بارش مدل WRF، پیش‌بینی بارش مدل برای سه حوضه با تفکیک‌های افقی 36، 12 و 4 کیلومتر در پنج مورد بارش سنگین منجر به سیلاب (بیشتر از 50 میلی‌متر در 24 ساعت) در حوضه‌های آبریز کرخه و کار...

Journal: :European heart journal 2006
Ramesh de Silva Nikolay P Nikitin Klaus K A Witte Alan S Rigby Kevin Goode Sunil Bhandari Andrew L Clark John G F Cleland

AIMS To determine the prevalence and incidence of renal dysfunction (RD) in patients with chronic heart failure (CHF), to identify contributory factors and predictors of worsening renal function (WRF), and to explore the relationship between RD and mortality. METHODS AND RESULTS Prospective data on 1216 patients with CHF were analysed. The glomerular filtration rate (GFR) was used to determin...

Journal: :Pharmacotherapy 2013
Megan M Clarke Michael P Dorsch Susie Kim Keith D Aaronson Todd M Koelling Barry E Bleske

STUDY OBJECTIVES To identify baseline predictors of worsening renal function (WRF) in an acute decompensated heart failure (ADHF) patient population receiving continuous infusion loop diuretics. DESIGN Retrospective observational analysis. SETTING Academic tertiary medical center. PATIENTS A total of 177 patients with ADHF receiving continuous infusion loop diuretics from January 2006 thr...

2009
David H. Bromwich Keith M. Hines Le-Sheng Bai

[1] A version of the state-of-the-art Weather Research and Forecasting model (WRF) has been developed for polar applications. The model known as ‘‘Polar WRF’’ is tested over the Arctic Ocean with a western Arctic grid using 25-km resolution. The model is based upon WRF version 2.2, with improvements to the Noah land surface model and the snowpack treatment. The ocean surface treatment is modifi...

2013
Hamish Clarke Jason P. Evans Andrew J. Pitman

The fire weather of south-east Australia from 1985 to 2009 has been simulated using the Weather Research and Forecasting (WRF) model. The US National Oceanic and Atmospheric Administration Centers for Environmental Prediction and National Center for Atmospheric Research reanalysis supplied the lateral boundary conditions and initial conditions. The model simulated climate and the reanalysis wer...

Journal: :Circulation. Heart failure 2014
Steven R Goldsmith Bradley A Bart John Burnett

O utcomes after admission for acute heart failure (AHF) remain extremely poor, especially for patients with decreased renal function or those in whom worsening renal function (WRF) develops during treatment. The Table shows the baseline estimated glomerular filtration rate (GFR) with 30-and 60-day mortality from the Dose Optimization Strategies Evaluation trial in acute Heart Failure (DOSE HF),...

Journal: :iran agricultural research 2015
m. m. moghimi a. r. sepaskhah

abstract- efficient use of irrigation water for summer crops should be considered seriously due to rare occurrence of precipitation in summer. this research was focused on the assessment of water use efficiency for dominant crops of summer cropping pattern in the study area (i.e., maize and rice) via considering water productivity (wp) with different water management scenarios at farm level at ...

2008
William I. Gustafson Richard C. Easter Larry K. Berg Steven J. Ghan

The Weather Research and Forecasting (WRF) model (Skamarock et al. 2005) is a powerful tool for model parameterization development. The ability to easily vary grid resolution and alter the domain size makes WRF particularly attractive because one is not limited to parameterizations solely suited for mesoscale grid sizes; one can also work with coarser, global climate model-like spacing. With re...

2007
Mohamed Moustaoui Alex Mahalov Basil Nichols

Staggered vertical nests have been developed, coupled with the WRF innermost nests. This methodology is applied to the high resolution simulations of field data from the T-REX Campaign of measurements (Terrain-induced Rotor Experiment), Owens Valley, CA, 2006. Our real case WRF simulations are based on initial and boundary conditions from both high resolution T799 L91 ECMWF analysis data and GF...

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