grace hydrology

grace hydrology
October 28, 2020

Large-scale mass redistribution (mass distribution changes over time) in the Earth system reflects the interaction between substances of various forms in the Earth’s internal system (atmosphere, oceans and solid crust, viscous mantle, liquid outer core, and solid inner core), which are the important subjects of Earth sciences. A GRACE-independent forward simulation of monthly land water storage changes (currently using soil moisture, snow, and canopy water). In this arid catchment, the meteorological and hydrologic observed data are scarce. Because of the limitations of GRACE satellite sensors in orbital altitude, vertical gravity gradient measurements, high frequency signal aliasing, and accurate measurement of time-varying gravity signals, the accuracy and spatial resolution of time-varying Earth gravity field signals at medium and long wavelength of GRACE is low, which reduced the TWS change retrieval accuracy. The TWS is the most direct hydrological parameter obtained by GRACE monitoring. This project was supported by National Natural Science Foundation of China (Grant no. Firstly, the scientific GRACE dataset is briefly introduced. By comparing with results of a land surface model (GLDAS-Noah), they found that the errors of GLDAS-Noah estimation are mainly due to model force parameter of precipitation. The mission will track gravitational changes in global sea levels, glaciers, and ice sheets, as well as large lake and river water levels, and soil moisture. [48] GRACE-FO employs the same two-way microwave-ranging link as GRACE, which will allow for similar inter-satellite ranging precision. For a fixed continental region, the changes in water storage (including soil water and surface snow) come from rainfall, evapotranspiration, river transportation, and deep underground infiltration. GRACE data have also provided insights into regional hydrology inaccessible to other forms of remote sensing: for example, groundwater depletion in India[21] and California. and Paleomagnetism, History of In addition, by combination of the measured data of rainfall, recharge, soil water, and groundwater, GRACE-based TWS was used for water storage variation of basin on interannual, annual, seasonal, and monthly time scales [25, 26]. Please visit the UT-CSR mascon site for further details. With the improvement of GRACE-based TWS change accuracy, the GRACE data is further used in hydrology and water resources research. Rodell et al. It provides a new technique for the large-scale monitoring of terrestrial water cycle. Hu et al. The paper presents a review of recent applications of GRACE data in terrestrial hydrology monitoring. (4)TWS changes retrieval based on spatiotemporal variations of gravity field remains considerable uncertainty, which includes errors produced in the removal of tidal movement and the mass migration because of the atmosphere and ocean circulation [11], as well as the errors in hydrological models used for the estimation of other terrestrial water parameters [6]. The time variation of global gravity field caused by the influence of solid Earth (including the inner core and the outer core) is mainly manifested on a 10-year or a longer time scale. Proposed filtering methods include spatial averaging, symmetric Gaussian filtering, optimized decorrelation filtering, time-series method, global hydrological model correction method, kernel-independent component analysis, and optimal smoothing kernel method [53, 57–62]. Generally, the water storage retrieval truncated to order 60 is widely adopted [17]. Physics, Solar [6] Atmospheric reentry of GRACE-2 occurred on 24 December 2017 at approximately 00:16 UTC;[8] atmospheric reentry of GRACE-1 took place on 10 March 2018 around 06:09 UTC. (1896-1977), Chinese Journal of Geophysics (2000-2018), International We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. Data from the GRACE satellites is an important tool for studying Earth's ocean, geology, and climate. Oceanography, hydrology, and ice sheets. However, such data are generally not available in extensive catchments. Yara Mohajerani, Isabella Velicogna, Eric Rignot, Evaluation of Regional Climate Models Using Regionally Optimized GRACE Mascons in the Amery and Getz Ice Shelves Basins, Antarctica, Geophysical Research Letters, 10.1029/2019GL084665, 46, 23, (13883-13891), (2019).

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