نتایج جستجو برای: gldas

تعداد نتایج: 195  

Journal: :Cold Regions Science and Technology 2022

The soil freeze-thaw phenomenon is one of the most distinguishing peculiarities land surface processes over Qinghai-Tibetan Plateau. By utilizing temperature/moisture and air temperature data from GLDAS-NOAH product, 4 observing networks 10 meteorological stations Plateau, spatio-temporal distribution start/end date duration freezing their relationships with altitude were investigated analytica...

Journal: :Frontiers in water 2021

Soil moisture plays an important role in the hydrologic water cycle. Relative to in-situ soil measurements, remote sensing has been only means of monitoring global scale near real-time over past 40 years. Among these, products from radiometry sensors operating at L-band, e.g., SMAP, SMOS, and SMOS-IC, are theoretically established be more advantageous than previous C/X-band products. However, l...

Journal: :Theoretical and Applied Climatology 2021

Land surface models (LSMs) are typically forced with observed precipitation and meteorology hence the soil moisture estimates obtained from LSM do not reflect contribution of irrigation to estimates. However, satellite retrievals register signature effects. It is suggested that may role if they assimilated estimated satellites. The present study evaluates improvement Noah by ingesting them sate...

Journal: :Remote Sensing 2021

The Qaidam Basin is a unique and complex ecosystem, wherein elevation gradients lead to high spatial heterogeneity in vegetation dynamics responses environmental factors. Based on the remote sensing data of Moderate Resolution Imaging Spectroradiometer (MODIS), Tropical Rainfall Measuring Mission (TRMM) Global Land Data Assimilation System (GLDAS), we analyzed spatiotemporal variations precipit...

Journal: :Journal of Hydrology 2021

Abstract Lack of high spatial resolution soil moisture data is a major limitation in many regional scale hydrologic, climatic and agricultural applications. The available satellite products are too coarse unable to cater for this requirement. Downscaling retrievals feasible option meet the required level those main focus study compare two thermal inertia-based downscaling models, built by using...

Journal: :Journal Of Geophysical Research: Atmospheres 2021

Currently available evapotranspiration (ET) products have not provided us with an accurate estimation for global irrigated land area. Thermal energy balance (EB) model has the potential to solve this problem. The of aerodynamic resistances is a major complication in most remote sensing ET models. An EB using column canopy-air turbulent heat diffusion method was developed more realistically depi...

Journal: :Remote Sensing 2022

In a changing environment, changes in terrestrial water storage (TWS) basins have significant impact on potential floods and affect flood risk assessment. Therefore, we aimed to study the of TWS floods. this study, reconstructed based precipitation temperature, evaluated data Gravity Recovery Climate Experiment (GRACE)-TWS data, analyzed calculated index (FPI) Yangtze River Basin (YRB). The rel...

Journal: :Journal of Hydrology 2021

• Evaluated uncertainty in model soil moisture using TCH and Taylor diagrams over GHA. High levels associated with high rainfall complex terrain. Magnitude of spatial variability contributed higher than patterns. Reanalysis products (ERA5 MERRA2) have lowest uncertainties. Lack situ Greater Horn Africa (GHA) has inhibited evaluation suitability land surface (LSM) and/or satellite-derived the re...

Journal: :Sustainability 2023

Precise rainfall measurement is essential for achieving reliable results in hydrologic applications. The technological advancement has brought numerous datasets that can be available to assess patterns. However, the suitability of a given dataset specific location remains an open question. objective this study find which perform well India at various spatial resolutions: pixel level, meteorolog...

Journal: :Remote Sensing 2021

Availability of global satellite based Soil Moisture (SM) data has promoted the emergence many applications in climate studies, agricultural water resource management and hydrology. In this context, validation set is substance. Remote sensing measurements which are representative an area covering 100 m2 to tens km2 rarely match with situ SM at point scale due difference. paper we present new In...

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