نتایج جستجو برای: including precipitation

تعداد نتایج: 1026329  

Journal: :آب و خاک 0
فاطمه عباسی شراره ملبوسی ایمان بابائیان مرتضی اثمری رضا برهانی

abstract in this research, four meteorological set of data including maximum temperature, minimum temperature, precipitation and radiation from echo-g, under a1scenario have been used for climate change detection over south khorasan. echo-g is a general circulation model that currently is used in hamburg university and korea meteorological research institute. in this research climate change ass...

Journal: :Global change biology 2016
Marc Estiarte Sara Vicca Josep Peñuelas Michael Bahn Claus Beier Bridget A Emmett Philip A Fay Paul J Hanson Roland Hasibeder Jaime Kigel Gyorgy Kröel-Dulay Klaus Steenberg Larsen Eszter Lellei-Kovács Jean-Marc Limousin Romà Ogaya Jean-Marc Ourcival Sabine Reinsch Osvaldo E Sala Inger Kappel Schmidt Marcelo Sternberg Katja Tielbörger Albert Tietema Ivan A Janssens

Well-defined productivity-precipitation relationships of ecosystems are needed as benchmarks for the validation of land models used for future projections. The productivity-precipitation relationship may be studied in two ways: the spatial approach relates differences in productivity to those in precipitation among sites along a precipitation gradient (the spatial fit, with a steeper slope); th...

2011
Samuel N. Stechmann J. David Neelin

A simple stochastic model is designed and analyzed in order to further understand the transition to strong convection. The transition has been characterized recently in observational data by an array of statistical measures, including (i) a sharp transition in mean precipitation, and a peak in precipitation variance, at a critical value of column water vapor (CWV), (ii) approximate power-law in...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - پژوهشکده مهندسی فرایند 1395

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

2011
Tianyu Zhang Isaac Klapper

Biofilm-induced mineral precipitation is a fundamentally important phenomenon with many potential applications including carbon sequestration and bioremediation. Based on amixture model consisting of three phases (calcite, biofilm, and solvent) and also accounting for chemistry, mechanics, thermodynamics, fluid, and electrodiffusive transport effects, we describe the self-induced generation of ...

Journal: :پژوهش های جغرافیای طبیعی 0
قاسم عزیزی دانشیار اقلیم شناسی، دانشکده جغرافیا، دانشگاه تهران طاهر صفرراد استادیار اقلیم شناسی، دانشکدة علوم انسانی و اجتماعی، دانشگاه مازندران حسین محمدی استاد اقلیم شناسی، دانشکدة جغرافیا، دانشگاه تهران حسنعلی فرجی سبکبار دانشیار جغرافیای انسانی، دانشکده جغرافیا، دانشگاه تهران

introduction there are significant differences in the spatial distribution of the iran annual precipitation. this is resulted from spatial behavior of precipitation in the one hand and variation in the sources of precipitation on the other. the lack of adequate distribution of meteorological stations and the unavailability of long-term statistics of precipitation makes the analysis of precipita...

2017
Adrian A. Harpold Michael L. Kaplan P. Zion Klos Timothy Link James P. McNamara Seshadri Rajagopal Rina Schumer Caitriana M. Steele

The phase of precipitation when it reaches the ground is a first-order driver of hydrologic processes in a watershed. The presence of snow, rain, or mixed-phase precipitation affects the initial and boundary conditions that drive hydrological models. Despite their foundational importance to terrestrial hydrology, typical phase partitioning methods (PPMs) specify the phase based on near-surface ...

2003
Steven V. Vasiloff Beth Clarke Charles Dempsey

Accurate estimates of precipitation type and amount are important for water management at the Salt River Project (SRP) located in Arizona. The primary focus of water operations at the SRP is management of reservoirs on the Salt and Verde Rivers. Knowledge of precipitation accumulating in watersheds (WSs) has historically been provided by a network of rain gauges located throughout and adjacent ...

Journal: :Science 1985
L G Thompson E Mosley-Thompson J F Bolzan B R Koci

Two ice cores, covering 1500 years of climatic information, from the summit (5670 meters) of the tropical Quelccaya ice cap, in the Andes of southern Peru, provide information on general environmental conditions including droughts, volcanic activity, moisture sources, temperature, and glacier net balance. The net balance record reconstructed from these cores reflects major precipitation trends ...

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