Results 31 to 40 of about 6,317 (256)

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

Analysis of a Relative Offset between the North American and the Global Vertical Datum in Gravity Potential Space

Remote Sensing, 2023
The accurate estimation of the zero-height geopotential level in a local vertical datum (LVD) is critical for linking traditional height reference systems to a global height system.
Dongmei Guo, Zhixin Xue
doaj   +1 more source

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

EVALUATION AND TAILORING OF GLOBAL GEOPOTENTIAL MODELS IN THE DETERMINATION OF GRAVITY FIELD IN SERBIA

STEPGRAD XIV (2020), 2019
<p>Within this paper, we evaluated the quality of three Global Geopotential Models entitled: EGM96,EGM2008, and GOCO05c. The models were evaluated by using 1001 terrestrial discrete values ofheight anomalies determined by Global Navigation Satellite Systems and normal heights, which weconsidered to be true values within this research.
Odalović, Oleg, Joksimović, Danilo, Petković, Dušan, Stanković, Marko, Grekulović, Sanja   +4 more
openaire   +3 more sources

Validation of Satellite-Only GGMs over the Western Part of North Macedonia [PDF]

Geodetski Glasnik
The purpose of this research is to identify the most suitable Global Geopotential Model (GGM) for geoid determination in a specific region of Western Macedonia. The selection of the most suitable GGM eliminates the evaluation of numerous alternatives and
Filip Petrovski
doaj   +1 more source

Assessing the Performance of the Copernicus European Regional Reanalysis Dataset in Reproducing Extreme Weather Events in Poland

International Journal of Climatology, EarlyView.
Global reanalyses, for example ERA5 and ERA5‐Land, tend to misrepresent the local‐scale weather extremes due to the limited spatial resolution. In this paper CERRA shows clear and consistent improvements over ERA5 and ERA5‐Land in representing extreme temperature and precipitation in Poland, particularly for localized and short‐lived heavy rainfall ...
Kinga Kulesza, Maciej Jefimow, Joanna Strużewska   +2 more
wiley   +1 more source

A model intercomparison analysing the link between column ozone and geopotential height anomalies in January [PDF]

, 2007
A statistical framework to evaluate the performance of chemistry-climate models with respect to the interaction between meteorology and column ozone during northern hemisphere mid-winter, in particularly January, is used.
P. Braesicke, Mancini, E., M. A. Giorgetta, Manzini, Elisa, Braesicke, P., Brühl, C., Dameris, Martin, Pitari, Giovanni, Damisris, M., Braesicke, Peter, E. Manzini, Steil, B., Pyle, J. A., Brühl, Christoph, Mancini, Eva, M. Dameris, G. Pitari, J. A. Pyle, Steil, Benedikt, Dameris, M., Pitari, G., Pyle, John, V. Eyring, Eyring, V., Giorgetta, M. A., R. Deckert, Giorgetta, Marco, Deckert, R., Eyring, Veronika, Manzini, E., Deckert, Rudolf, C. Brühl, E. Mancini, B. Steil   +33 more
core  

REGIONAL ANALYSIS OF RECENT GLOBAL GEOPOTENTIAL MODELS: A CASE STUDY IN TURKEY

SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2017
17th International Multidisciplinary Scientific GeoConference, SGEM 2017 -- 29 June 2017 through 5 July 2017 -- -- 130787 Geoid is an equipotential surface of Earth’s gravity field, which partially coincides with the mean sea level and extended inside continents.
Demir, Selda, Abbak, Ramazan Alpay
openaire   +2 more sources

Observed Linkages Between Marine Heatwaves and Extreme Weather Over Land: A New Zealand Case Study

International Journal of Climatology, EarlyView.
Marine heatwaves consistently warm New Zealand's land surface, but rainfall impacts occur only when synoptic systems enable moisture transport. This 38‐year analysis shows MHWs act as thermodynamic background drivers of heat and conditional amplifiers of extreme rainfall events or droughts.
Matthew Chinappa, Hamish Lewis, Luke J. Harrington, Peter B. Gibson   +3 more
wiley   +1 more source

Tracking Summer Greenland Blocking: The Upstream Pathway Shapes Historical Extremes and Future Change

International Journal of Climatology, EarlyView.
This study investigates summer Greenland atmospheric blocking using the Lagrangian tracking Python package blocktrack applied to ERA5 reanalysis and CMIP6 models. Two types of blocks—upstream (Northern Canada origin) and retrograding (Northern Atlantic origin)—are distinguished, with upstream blocks driving recent observed frequency increasing trends ...
Michele Filippucci, Jacob Maddison, Simona Bordoni   +2 more
wiley   +1 more source