نتایج جستجو برای: gleam
تعداد نتایج: 136 فیلتر نتایج به سال:
Knowledge of evapotranspiration (ET) is essential for enhancing our understanding of the hydrological cycle, as well as for managing water resources, particularly in semi-arid regions. Remote sensing offers a comprehensive means of monitoring this phenomenon at different spatial and temporal intervals. Currently, several satellite methods exist and are used to assess ET at various spatial and t...
A recursive claim that there is a ’scarcity of global data on evaporative partitioning’ is used to justify the development of the STEAM model (see e.g. pg. 206, L23). However, over the last decade, there have been numerous efforts to derive the separate components of the terrestrial evaporative flux at the global scale, not just from land surface models and climate reanalyses, but also by combi...
Validation of remotely sensed evapotranspiration (RS_ET) products is important because their accuracy critical for various scientific applications. In this study, an integrated validation framework was proposed evaluating RS_ET with coarse spatial resolution extending from homogenous to heterogeneous land surfaces. This applied at the pixel and river basin scales, using direct indirect methods ...
We revive a 60-year-old idea that might explain remarkable new observation of periodic low-frequency radio emission from source at galactic distances (GLEAM-X J162759.5-523504.3). It derives the high-density high-temperature charged boson plasma is superconducting superfluid with Meissner effect.
GLEAM (Global Land Evapotranspiration Amsterdam Model)和MOD16(MODIS Global Project)全球蒸散发产品已经得到了广泛的检验和应用,但由于观测资料缺乏,尚缺少对高原地区的检验。本文以青藏高原然乌湖流域、羊卓雍错流域、纳木错流域、色林错流域和塔若错流域为检验区域,利用流域水量平衡法,采用相关系数、相对误差、均方根误差和Kling-Gupta系数,对这两种蒸散产品开展了精度验证与评价。结果表明:GLEAM蒸散发产品在然乌湖、色林错和塔若错流域整体存在低估现象,在羊卓雍错和纳木错流域存在轻微高估现象,而MOD16产品仅在色林错流域有轻微低估现象,在其他湖泊流域均表现为高估;GLEAM和MOD16蒸散发产品在5个湖泊流域年降水量较少的年份均存在高估的现象,在湿润年份则为低估;GLEAM产品在然乌湖流域、羊卓雍错流域和色...
Model calibration and validation are challenging in poorly gauged basins. We developed applied a new approach to calibrate hydrological models using distributed geospatial remote sensing data. The Soil Water Assessment Tool (SWAT) model was calibrated only twelve months of data on actual evapotranspiration (ETa) geospatially the 37 sub-basins Lake Chad Basin Africa. Global sensitivity analysis ...
Clip art is a simplified illustration form consisting of layered filled polygons or closed curves used to convey 3-D shape information in a 2-D vector graphics format. This paper focuses on the problem of direct conversion of smooth surfaces, ranging from the free-form shapes of art and design to the mathematical structures of geometry and topology, into a clip art form suitable for illustratio...
Observational patient data provides an unprecedented opportunity to gleam new insights into diseases and assess patient quality of care, but a challenge lies in matching our ability to collect data with a comparable ability to understand and apply this information. Visual analytic techniques are promising as they permit the exploration and manipulation of complex datasets through a graphical us...
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