نتایج جستجو برای: ماهواره trmm
تعداد نتایج: 6718 فیلتر نتایج به سال:
آگاهی از میزان ریسک فرسایش خاک در حوزه های آبخیز امکان شناسایی نواحی بحرانی و اولویت بندی برنامه های مدیریتی و حفاظتی را فراهم می سازد. هدف از تحقیق حاضر تهیه نقشه ریسک فرسایش خاک بر اساس منطق فازی در حوزه آبخیز قرناوه گلستان است. تهیه نقشه ریسک فرسایش خاک در سه مرحله انجام گرفت: در مرحله اول، نقشه شاخص حفاظت خاک (spi) با استفاده از دو فاکتور اولیه کاربری اراضی-پوشش اراضی و شاخص اختلاف نرمال شد...
Local dry/wet conditions are of great concern in regional water resource and floods/droughts disaster risk management. Satellite-based precipitation products have greatly improved their accuracy and applicability and are expected to offer an alternative to ground rain gauges data. This paper investigated the capability of Tropical Rainfall Measuring Mission (TRMM) rainfall data for monitoring t...
به دلیل نقش موثر بارندگی در تامین بخشی از نیاز آبی محصولات کشاورزی و یا ایجاد سیل در حوضه های کوهستانی و فرسایش آبی، تخمین دقیق توزیع زمانی و مکانی بارندگی، همواره مورد توجه متخصصان رشته های مختلف قرار گرفته است. روش های سنتی که برای اندازه گیری بارش مورد استفاده قرار می گیرند، معمولا مبتنی بر ایستگاه های سینوپتیک، اقلیم شناسی و باران سنج ها بوده و دارای مشکلاتی از قبیل هزینه بر بودن، کمبود ایس...
This study evaluated Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) product i.e. TRMM 3B42 data, using data from 52 rain gauge stations around the Meichuan watershed, which is a representative watershed of Poyang Lake basin in China. Both the latest Version 7 (V7) and previous Version 6 (V6) of TRMM 3B42 data were compared and evaluated for a 9-year per...
The Tropical Rainfall Measuring Mission (TRMM) is a NASA satellite project initiated to address a gap in our ability to accurately observe detailed rainfall patterns over the tropical continents and oceans. To support TRMM, several field campaigns were conducted. The TRMM-LBA (Large-scale Biosphere Atmosphere) experiment was conducted over the southwestern region of the Amazon (state of Rondôni...
Benefiting from the high spatiotemporal resolution and near-global coverage, satellite-based precipitation products are applied in many research fields. However, the applications of these products may be limited due to lack of information on the uncertainties. To facilitate applications of these products, it is crucial to quantify and document their error characteristics. In this study, four sa...
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 ...
A study was performed using the first full year of rain gauge records from a newly deployed network in the Southern Appalachian mountains. This is a region characterized by complex topography with orographic rainfall enhancement up to 300% over small distances (<8 km). Rain gauge observations were used to assess precipitation estimates from the Precipitation Radar (PR) on board of the TRMM sate...
This study utilizes TRMM satellite precipitation radar, lightning imaging sensor, and passive microwave imager data together with ground-based lightning data to investigate the vertical structure, lightning, and rainfall characteristics of Amazonian and sub-tropical South American convection for three separate wet-seasons. These characteristics are partitioned as a function of 850 mb zonal wind...
بارش از اجزای اصلی چرخهی آبشناسی است و به دادههای آن در تحلیلهای آبوهوایی و مدلهای آبشناختی نیاز است. با توجه به کمبود دادههای بارش در گستره...
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