Results 31 to 40 of about 16,098 (281)

Geoid-to-Quasigeoid Separation Computed Using the GRACE/GOCE Global Geopotential Model GOCO02S - A Case Study of Himalayas and Tibet

Terrestrial, Atmospheric and Oceanic Sciences, 2013
The geoid-to-quasigeoid correction has been traditionally computed approximately as a function of the planar Bouguer gravity anomaly and the topographic height.
Mohammad Bagherbandi Robert Tenzer
doaj   +1 more source

Evaluation of recent Earth’s global gravity field models with terrestrial gravity data

Contributions to Geophysics and Geodesy, 2016
In the context of the rapid development of environmental research technologies and techniques to solve scientific and practical problems in different fields of knowledge including geosciences, the study of Earth’s gravity field models is still important ...
Alexander P. KARPIK, Vadim F. KANUSHIN, Irina G. GANAGINA, Denis N. GOLDOBIN, Nikolay S. KOSAREV, Alexandra M. KOSAREVA   +5 more
doaj   +1 more source

A Comparison of Two Shallow Water Models with Non-Conforming Adaptive Grids: classical tests [PDF]

, 2007
In an effort to study the applicability of adaptive mesh refinement (AMR) techniques to atmospheric models an interpolation-based spectral element shallow water model on a cubed-sphere grid is compared to a block-structured finite volume method in ...
Amik St-Cyr, Bacon, Behrens, Behrens, Boyd, Boyd, Carpenter, Christiane Jablonowski, Colella, Dennis, Deville, Dietachmayer, Feng, Fischer, Fournier, Fox-Rabinovitz, Frohn, Galewsky, Gibbs, Giraldo, Giraldo, Giraldo, Giraldo, Gopalakrishnan, Haidvogel, Henry M. Tufo, Iselin, Iselin, Jablonowski, Jablonowski, Jablonowski, Jakob-Chien, John M. Dennis, Karypis, Kurihara, Kurihara, Lin, Lin, Lipscomb, Läuter, Läuter, Nair, Nair, Nair, Oehmke, Patera, Prusa, Quarteroni, Rosenberg, Sadourny, Skamarock, Skamarock, Skamarock, Smolarkiewicz, Smolarkiewicz, St-Cyr, St-Cyr, St-Cyr, Stephen J. Thomas, Taylor, Taylor, Thomas, Tolstykh, Vandeven, Wilhelm, Williamson   +65 more
core   +2 more sources

An Assessment of Recently Released High-Degree Global Geopotential Models Based on Heterogeneous Geodetic and Ocean Data

Frontiers in Earth Science, 2021
The development of the global geopotential model (GGM) broadens its applications in ocean science, which emphasizes the importance for model assessment.
Yihao Wu, Xiufeng He, Zhicai Luo, Hongkai Shi   +3 more
doaj   +1 more source

An intercomparison of subtropical cut-off lows in the Southern Hemisphere using recent reanalyses: ERA-Interim, NCEP-CFRS, MERRA-2, JRA-55, and JRA-25 [PDF]

, 2020
Four recent reanalysis products ERA-Interim, NCEP-CFSR, MERRA-2 and JRA-55 are evaluated and compared to an older reanalysis JRA-25, to quantify their confidence in representing Cut-off lows (COLs) in the Southern Hemisphere.
Gan, Manoel Alonso, Hodges, Kevin Ivan, Pinheiro, Henri Rossi   +2 more
core   +1 more source

A regional Stokes-Helmert geoid determination for Costa Rica (GCR-RSH-2020): computation and evaluation

Contributions to Geophysics and Geodesy, 2020
GNSS observations are a common solution for outdoor positioning around the world for coarse and precise applications. However, GNSS produces geodetic heights, which are not physically meaningful, limiting their functionality in many engineering ...
Jaime GARBANZO-LEÓN, Alonso VEGA FERNÁNDEZ, Mauricio VARELA SÁNCHEZ, Juan Picado SALVATIERRA, Robert W. KINGDON, Oscar H. LÜCKE   +5 more
doaj   +1 more source

A Shallow-water Model Exploration of Atmospheric Circulation on Sub-Neptunes: Effects of Radiative Forcing and Rotation Period

The Planetary Science Journal, 2023
Sub-Neptune-type exoplanets are abundant in our Galaxy yet have no solar system analogs. They exist in a broad range of stellar forcing and rotational regimes that are distinctly different from solar system planets and more commonly studied hot Jupiters.
Ekaterina Landgren, Alice Nadeau, Nikole Lewis, Tiffany Kataria, Peter Hitchcock   +4 more
doaj   +1 more source

Assessments of recent Global Geopotential Models based on GPS/levelling and gravity data along coastal zones of Egypt

Open Geosciences, 2023
The orthometric height has an essential role in a variety of civil engineering projects and it is defined as the length of the curved plumbline from a point (on the earth surface) to its intersection with the geoid surface. Leveling process is considered
Al Shouny Ahmed, Khalil Ragab, Kamel Abdullah, Miky Yehia   +3 more
doaj   +1 more source

Intercomparison of the northern hemisphere winter mid-latitude atmospheric variability of the IPCC models

, 2006
We compare, for the overlapping time frame 1962-2000, the estimate of the northern hemisphere (NH) mid-latitude winter atmospheric variability within the XX century simulations of 17 global climate models (GCMs) included in the IPCC-4AR with the NCEP and
A Buzzi, A Speranza, A Sumi, AK Betts, Alessandro Dell’Aquila, Antonio Speranza, AR Hansen, AR Hansen, D Gregory, D-M Pan, E Klinker, EM Volodin, G Branstator, G Branstator, GA Schmidt, GJ Van Oldenburg, GJ Zhang, H Le Treut, J Jungclaus, J-L Ricard, J-Y Grandpeix, JG Charney, JG Charney, JJ Hack, JM Wallace, JM Wallace, JP Peixoto, JR Holton, JT Kiehl, K Fraedrich, LD Rotstayn, LD Rotstayn, M Tiedke, ML Blackmon, P Bougeault, P Malguzzi, P Siegmund, Paolo M. Ruti, PJ Rasch, R Benzi, R Benzi, R Kistler, S Bony, S Moorthi, S Tibaldi, S-J Kim, S-K Min, Sandro Calmanti, T Furevik, TL Delworth, U Lohmann, V Lucarini, Valerio Lucarini, W May, Y Hayashi, Y Hayashi, Y Kushnir, Y Yu   +57 more
core   +1 more source

Evaluating the performance of various models for deriving orthometricheights using Global Navigation Satellite System (GNSS) data

Nova Geodesia
Orthometric heights are vital for fields such as topographic mapping, construction, engineering, and geophysical studies. This study examines the performance of five Global Geopotential Models (GGMs) and Global Navigation Satellite System (GNSS) data in
Herbert TATA, Clementina Ajibola OLAOYE
doaj   +1 more source