نتایج جستجو برای: gcms

تعداد نتایج: 1783  

ژورنال: :پژوهش های حفاظت آب و خاک 0
علی شبستانی دانشگاه علوم کشاورزی و منابع طبیعی ساری عبداله درزی نفت چالی استادیار گروه مهندسی آب دانشگاه علوم کشاورزی و منابع طبیعی ساری فاطمه کاراندیش استادیار گروه مهندسی آب دانشگاه زابل

مقدمه و هدف افزایش جهانیِ گازهای گلخانه ای به دلیل متاثر ساختن متغیرهای مهمِ هواشناسی و هیدرولوژیکی همانند تبخیر- تعرق پتانسیل، می تواند تهدیدی جدی برای کشاورزی پایدار در شرایط وقوع تغییراقلیم محسوب شود. تبخیر- تعرق پتانسیل یکی از عوامل کلیدی موثر بر تولید محصولات کشاورزی است و نداشتن درک مناسب از مقدارِ آن می تواند امنیت آب و غذا را به مخاطره بیندازد. به همین دلیل در این پژوهش، مقدار این متغیرِ مه...

Journal: :Journal of Climate 2021

Abstract In this study, we aim to better understand the current and future projections of precipitation extremes in Europe context climatic variability over a long-term period from last millennium end twenty-first century. The daily gridded data five global climate models (GCMs) phase 5 Coupled Model Intercomparison Project (CMIP5) are chosen investigate natural during (850–1849), historical (1...

Journal: :Pertanika journal of tropical agricultural science 2021

Terminalia catappa and subspathulata are two species of the Combretaceae family medium to large forest trees. The fruits T. known for edible nuts commonly as tropical almonds due their similarity in taste with commerce. Therefore, chemical profiles were examined ascertain potential value food or health uses. Gas chromatography-mass spectrometry (GCMS) ultrahigh-pressure liquid chromatography-el...

Journal: :Climate Dynamics 2022

Abstract The societies of the Greater Horn Africa (GHA) are vulnerable to variability in two distinct rainy seasons, March–May ‘long’ rains and October–December ‘short’ rains. Recent trends both possibly related patterns low-frequency variability, have increased interest future climate projections from General Circulation Models (GCMs). However, previous generations GCMs historically poorly sim...

Journal: :Theoretical and Applied Climatology 2022

The most practical methods to predict climate change are global models (GCMs). This research set out evaluate the ability of 19 GCMs from Coupled Model Intercomparison Project 6 (CMIP6) reproduce historical precipitation, maximum, and minimum temperature (Pr, Tmx, Tmn) prediction center data for Amu Darya river basin (ADRB), as well project using chosen GCMs. Kling-Gupta efficiency (KGE) metric...

Journal: :Geoscientific Model Development 2023

Abstract. All current global climate models (GCMs) utilize only grid-averaged surface heat fluxes to drive the atmosphere, and thus their subgrid horizontal variations partitioning are absent. This can result in many simulation biases. To address this shortcoming, a novel parameterization scheme considering of sensible latent atmosphere associated is developed implemented into National Center f...

1998
K.-M. Xu

This study is a part of the Atmospheric Radiation Measurement (ARM) Program single-column model (SCM) intercomparison project, which compares the performance of various SCMs and cloud ensemble models (CEMs) with ARM intensive observation period (IOP) data sets. The goal of this project is to improve the representations of cloud formative/dissipative processes in general circulation models (GCMs...

1998
Q. Zhang

Arctic stratus clouds (ASC) are important modulators of global climate. Through interaction with radiation, they have an important influence on the surface fluxes of heat, moisture and momentum in the boundary layer. Due to lack of properly understanding the clouds formation and their interactions with radiation, ASC are currently not realistically simulated by general circulation models (GCMs)...

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