نتایج جستجو برای: precipitation data

تعداد نتایج: 2454931  

2012
J. L. Catto C. Jakob G. Berry N. Nicholls

[1] Atmospheric fronts are important for the day-to-day variability of weather in the midlatitudes, particularly during winter when extratropical storm-tracks are at their maximum intensity. Fronts are often associated with heavy rain, and strongly affect the local space-time distribution of rainfall. A recently developed objective front identification method that distinguishes between cold, wa...

آرزومندی, لیلی, قاسمی فر, الهام, ناصرپور, سمیه,

Precipitation is not only a critical process in global hydrologic cycle but also an important indicator of climate change (Fu et al.,2016). Precipitation is a key factor of the global water cycle and affects all aspects of human life. Because of its great importance and its high spatial and temporal variability (Thies and Bendix.,2011). Climate change is caused many extreme climatic occurrences...

1999
Aiguo Dai

Hourly precipitation data from 1963 to 1993 of the contiguous United States were analyzed for secular trends in the diurnal cycle of precipitation. During the period the winter daytime and nighttime precipitation frequencies and the diurnal amplitude of precipitation frequency increased by ∼30−47% over the Southwest, while the winter precipitation frequencies and the diurnal amplitude of precip...

2014
Yan Yang Guoqiang Wang Lijing Wang Jingshan Yu Zongxue Xu

Gridded precipitation data are becoming an important source for driving hydrologic models to achieve stable and valid simulation results in different regions. Thus, evaluating different sources of precipitation data is important for improving the applicability of gridded data. In this study, we used three gridded rainfall datasets: 1) National Centers for Environmental Prediction-Climate Foreca...

Journal: Desert 2010
s. Modallaldoust

A watershed management program is usually based on the results of watershed modeling. Accurate modeling results are decided by the appropriate parameters and input data. Precipitation is the most important input for watershed modeling. Precipitation characteristics usually exhibit significant spatial variation, even within small watersheds. Therefore, properly describing the spatial variation o...

2017
Hongwei Ruan Songbing Zou Dawen Yang Yuhan Wang Zhenliang Yin Zhixiang Lu Fang Li Baorong Xu

The scarcity and uneven distribution of precipitation stations in the inland river basins of the Northeastern Tibetan Plateau restrict the application of the distributed hydrological model and spatial analysis of water balance component characteristics. This study used the upper Heihe River Basin as a case study, and daily gridded precipitation data with 3 km resolution based on the spatial int...

2011
A. AghaKouchak A. Behrangi S. Sorooshian K. Hsu E. Amitai

[1] Water resources management, forecasting, and decision making require reliable estimates of precipitation. Extreme precipitation events are of particular importance because of their severe impact on the economy, the environment, and the society. In recent years, the emergence of various satellite‐retrieved precipitation products with high spatial resolutions and global coverage have resulted...

Journal: :desert 2008
gh.r. zehtabian a. malekian h. m. asgari a. zoratipour

prediction of annual average precipitation over a regin is one of important issues in watersherd management and natural resources planning. geostatistics is one of the useful methods for precipitation prediction which varies based on type of the variable. this study was conducted in karoon and dez basins located in southwertern of iran. the data set including 20 years of annual precipitation of...

2016
Christian Yarleque Mathias Vuille Douglas R. Hardy Adolfo Posadas Roberto Quiroz

Studying precipitation variability in the Peruvian Andes is a challenge given the high topographic variability and the scarcity of weather stations. Yet previous research has shown that a near-linear relationship exists between precipitation and vegetation in the semiarid central Andes. We exploit this relationship by developing a new, spatially highly resolved spatiotemporal precipitation reco...

ژورنال: آبخیزداری ایران 2019

The lack of a reliable and extended system to monitor rainfall is one of the major challenges in analyzing, hydrological prediction and water resources management in Iran. Using satellite precipitation products in some parts of the country with lack or presence of low quality precipitation data, which can be used as alternative source for basins with sparse data in developing countries such as ...

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