Results 1 to 10 of about 167 (134)
Improved geophysical excitations constrained by polar motion observations and GRACE/SLR time-dependent gravity [PDF]
Geodesy and Geodynamics, 2017 At seasonal and intraseasonal time scales, polar motions are mainly excited by angular momentum fluctuations due to mass redistributions and relative motions in the atmosphere, oceans, and continental water, snow, and ice, which are usually provided by ...
Wei Chen +3 more
doaj +6 more sources
Analysis of combined series of hydrological angular momentum developed based on climate models
Frontiers in Earth ScienceMass changes in the hydrosphere represent an important contributor to polar motion (PM) variations, especially at seasonal time scales (i.e., annual and semiannual).
Jolanta Nastula +3 more
doaj +6 more sources
High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations [PDF]
Sensors, 2015 The Earth’s rotation undergoes changes with the influence of geophysical factors, such as Earth’s surface fluid mass redistribution of the atmosphere, ocean and hydrology.
Erhu Wei +5 more
doaj +3 more sources
Preliminary study on hydrological angular momentum determined from CMIP6 historical simulations
Earth, Planets and Space, 2022 Polar motion (PM) is an essential parameter needed to transform coordinates between celestial and terrestrial reference frames, thus playing a crucial role in precise positioning and navigation.
Jolanta Nastula +4 more
doaj +4 more sources
Remote Sensing, 2021 Similar to seasonal and intraseasonal variations in polar motion (PM), interannual variations are also largely caused by changes in the angular momentum of the Earth’s geophysical fluid layers composed of the atmosphere, the oceans, and in-land ...
Małgorzata Wińska
doaj +2 more sources
Remote Sensing, 2020 From 2002 to 2017, the Gravity Recovery and Climate Experiment (GRACE) mission’s twin satellites measured variations in the mass redistribution of Earth’s superficial fluids, which disturb polar motion (PM).
Jolanta Nastula, Justyna Śliwińska
doaj +2 more sources
Validation of GRACE and GRACE-FO Mascon Data for the Study of Polar Motion Excitation
Remote Sensing, 2021 In this study, we calculate the hydrological plus cryospheric excitation of polar motion (hydrological plus cryospheric angular momentum, HAM/CAM) using mascon solutions based on observations from the Gravity Recovery and Climate Experiment (GRACE) and ...
Justyna Śliwińska +2 more
doaj +2 more sources
Geodetic residual time series: A combined series by minimization of their internal noise level
Frontiers in Earth Science, 2023 This study aims to assess the hydrological effects of polar motion calculated from different combinations of geophysical excitations at decadal, seasonal, and non-seasonal periods.
Małgorzata Wińska
doaj +1 more source
Excitations of length-of-day seasonal variations: Analyses of harmonic and inharmonic fluctuations
Geodesy and Geodynamics, 2020 Geophysical excitations of length-of-day (LOD) variations is of great significance in understanding changes in the Earth's spin rate and interactions between geophysical fluids and the solid Earth, as well as validating the reliability of atmospheric ...
Jiesi Luo +3 more
doaj +1 more source
Remote Sensing, 2020 Over the last 15 years, the Gravity Recovery and Climate Experiment (GRACE) mission has provided measurements of temporal changes in mass redistribution at and within the Earth that affect polar motion. The newest generation of GRACE temporal models, are
Justyna Śliwińska +3 more
doaj +1 more source