نتایج جستجو برای: gldas
تعداد نتایج: 195 فیلتر نتایج به سال:
Soil moisture (SM) is critical in monitoring the time-lagged impacts of agrometeorological drought. In Australia and several south-west Pacific Small Island Developing States (SIDS), there are a limited number situ SM stations that can adequately assess soil-water availability near-real-time context. Satellite datasets provide viable alternative for drought provision these regions. this study, ...
Solar radiation ( S RAD ) plays a pivotal role for crop growth and development, is, therefore, an indispensable input simulation models. Lack of weather data, particularly , is problematic issue in many agricultural zones. To handle this dearth, there have been recent advances the improvement application gridded which provide realistic alternatives to observed data. The main objective present r...
Soil moisture (SM) products presently available in permafrost regions, especially on the Qinghai–Tibet Plateau (QTP), hardly meet demands of evaluating and modeling climatic, hydrological, ecological processes, due to their significant bias low spatial resolution. This study developed an algorithm generate high-spatial-resolution SM during thawing season using Sentinel-1 (S1) Sentinel-2 (S2) te...
Actual evapotranspiration (ET) is a major water use flux in a basin water balance with crucial significance for water resources management and planning. Mapping ET with good accuracy has been the subject of ongoing research. Such mapping is even more challenging in heterogeneous and data-scarce regions. The main objective of our research is to estimate ET using daily Moderate Resolution Imaging...
Soil moisture (SM) is a crucial driving variable for the global land surface-atmosphere water and energy cycle. There are now many satellite-based SM products available internationally it necessary to consider all under same context comprehensive assessment inter-comparisons at scale. Moreover, product performances varying with dynamic environmental factors, especially those closely related ret...
The comprehensive evaluation of model- and satellite-based surface soil temperature (ST) products is a prerequisite for applications these datasets in hydrology, ecology, climate change, as well passive microwave moisture retrieval algorithms. Distinguished from existing regional validations, this study used ground observations approximately 800 stations 5 sparse 15 dense networks worldwide to ...
ازآنجا که تشخیص آنومالیهای لرزهای بهدلیل ساختار پیچیدة زمین و عدم شناخت کامل سازوکار وقوع زلزله، دشوار است، دسترسی به دادههای حرارتی متنوع بهدستآمده از روشهای سنجش از دوری سبب شده تا امکان بررسی آنومالی حرارتی قبل از وقوع زلزلههای بزرگ فراهم شود. آنومالیهای حاصل از پیشنشانگرهای حرارتی، از اصلیترین منابع پیشبینی زلزلهاند. در این مطالعه با استفاده از پیشنشانگرهای دمای سطح (Land Surf...
Abstract. The snow water equivalent (SWE) is an important parameter of surface hydrological and climate systems, it has a profound impact on Arctic amplification change. However, there are great differences among existing SWE products. In the land region above 45∘ N, products associated with limited time span spatial coverage, resolution coarse, which greatly limits application data in cryosphe...
NASA’s MODIS/VIIRS Global Water Reservoir Product Suite from Moderate Resolution Remote Sensing Data
Global reservoir information can not only benefit local water management but also improve our understanding of the hydrological cycle. This includes area, elevation, and storage; evaporation rate volume values; other characteristics. However, operational wall-to-wall storage monitoring is lacking on a global scale. Here we introduce NASA’s new MODIS/VIIRS Water Reservoir product suite based mod...
The terrestrial water resources in Shaanxi–Gansu–Ningxia (SGN) region are relatively scarce, and its climate change is unstable. Research on the deformation driven by load of great significance to dynamic maintenance reference station networks. In this paper, data derived from Gravity Recovery Climate Experiment (GRACE) Global Navigation Satellite System (GNSS) 2010 2014 were combined monitor s...
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