نتایج جستجو برای: persiann cdr
تعداد نتایج: 2627 فیلتر نتایج به سال:
پراکنش نامناسب ایستگاههای اندازهگیری بارش در سطح زمین، باعث افزایش استفاده از منابع بارش شبکهبندی شده متشکل از منابع ماهوارهای، بازتحلیل و زمینی شده است. بنابراین، اندازهگیری و برآورد دقیق مقدار و رخدادهای بارش از اهمیت زیادی برخوردار است. با توسعه روزافزون تکنولوژیهای ماهوارهای در دهههای اخیر، امکان دسترسی به منابع بارشی با تفکیک مکانی و زمانی بالا برای بسیاری از نقاط جهان فراهم شده اس...
Accurate estimation of rainfall in mountainous areas is necessary for various water resource-related applications. Though rain gauges accurately measure rainfall, they are rarely found in mountainous regions and satellite rainfall data can be used as an alternative source over these regions. This study evaluated the performance of three high-resolution satellite rainfall products, the Tropical ...
Diurnal Variability of Tropical Rainfall Retrieved from Combined GOES and TRMM Satellite Information
Recent progress in satellite remote-sensing techniques for precipitation estimation, along with more accurate tropical rainfall measurements from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR) instruments, have made it possible to monitor tropical rainfall diurnal patterns and their intensities from satellite information. One year (August 1998...
In this study, seven precipitation products (rain gauges, NEXRAD MPE, PERSIANN 0.25 degree, PERSIANN CCS-3hr, PERSIANN CCS-1hr, TRMM 3B42V7, and CMORPH) were used to force a physically-based distributed hydrologic model. The model was driven by these products to simulate the hydrologic response of a 1232 km watershed in the Guadalupe River basin, Texas. Storm events in 2007 were used to analyze...
As a major component of water cycle, the accuracy quantification different precipitation products is critical for evaluating climate change and ecosystem functions. However, lack evidence available to choose precise product in relative applications. Here, solve this limit, we analyze spatiotemporal pattern four products, including CHIRPS V2.0, PERSIANN-CDR, ECMWF ERA5-Land, GLDAS_NOAH025_3H, ov...
In 2015, an emergency state was declared in Bolivia when Poopó Lake dried up. Climate variability and the increasing need for water are potential factors responsible for this situation. Because field data are missing over the region, no statements are possible about the influence of mentioned factors. This study is a preliminary step toward the understanding of Poopó Lake drought using remote s...
Precipitation is a key aspect of the climate system. In this paper, the dependability of five satellite precipitation products (TRMM [Tropical Rainfall Measuring Mission] 3BV42, PERSIANN [Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks] CDR, GSMaP [Global Satellite Mapping of Precipitation] RENALYSIS, CMORPH [Climate Prediction Center’s morphing techni...
By employing wavelet and selected features (WSF), median merging (MM), and selected curve-fitting (SCF) techniques, the Precipitation Estimation from Remotely Sensed Imagery using an Artificial Neural Networks Cloud Classification System (PERSIANN-CCS) has been improved. The PERSIANN-CCS methodology includes the following four main steps: 1) segmentation of satellite cloud images into cloud pat...
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