Results 111 to 120 of about 1,044,226 (312)

Evaluation of grace-based combined geopotential model over the Baltic countries

Geodesy and Cartography, 2012
Nowadays, many geodetic and engineering applications require that the two essential components of the vertical positioning – the height and the corresponding reference surface (geoid), are determined precisely.
Artu Ellmann, Harli Jürgenson
doaj   +1 more source

Evaluating Atmospheric River Impacts on Energy and Moisture Transport in the Arctic Using Different Detection Algorithms

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract Atmospheric rivers (ARs) significantly impact the Arctic climate system by enhancing atmospheric heat and moisture transport and altering the local energy budget. Developing AR detection tools (ARDTs) is critical yet challenging. This study evaluates 12 ARDTs in the Arctic to assess their performance in representing atmospheric heat ...
Chen Zhang, John J. Cassano, Mark W. Seefeldt, Wen‐wen Tung, Ankur Mahesh, William D. Collins   +5 more
wiley   +1 more source

Evaluation of new release Global Geopotential Model (GGMS) over East Malaysia

GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY
Global Geopotential Model (GGM) is a mathematical representation of the Earth’s gravity field and geoid, which is developed to provide accurate information about the variations in the Earth’s gravitational potential across the entire globe. Recently numerous organizations and research centres have developed multi GGMs derived from several types of ...
Noorhurul A. Othman, Muhammad F. Pa’suya, Ami H. Md Din, Mohamad A. Che Aziz, S. Hazelin Noor Azmin Nurul, A. Abd Samad Mohd, Mohd A. Abdullah   +6 more
openaire   +1 more source

Sources of Subseasonal Predictability for Precipitation in South America Based on Model Experiments

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract This study investigates the sources of predictability underlying subseasonal precipitation skill over South America in existing subseasonal prediction systems. Using subseasonal re‐forecasts from the NCAR‐CESM2 model, we demonstrate that significant skill persists even when interannual variability is removed.
Kathy Pegion, Emily Becker, Ben P. Kirtman   +2 more
wiley   +1 more source

A novel approach for optimizing regional geoid modeling over rugged terrains based on global geopotential models and artificial intelligence algorithms

Egyptian Journal of Remote Sensing and Space Sciences
Accurate geoid modeling is significant in geodetic, geological, and environmental sciences. Owing to challenges in establishing reference stations, particularly in rugged terrains, such as in Northern Vietnam, leveraging global geopotential models (GGMs)
Mohamed A. Elshewy, Phung Trung Thanh, Amr M. Elsheshtawy, Mervat Refaat, Mohamed Freeshah   +4 more
doaj   +1 more source

The impact of the new Earth gravity models on the measurement of the Lense-Thirring effect

, 2003
In this paper we use, in a preliminary way, the recently released EIGEN2 Earth gravity model, which is based on six months of data of CHAMP only, in order to reassess the systematic error due to the mismodelling in the even zonal harmonics of ...
Iorio, Lorenzo, Morea, Alberto
core   +1 more source

The Moist Static Energy Budget of Australian Summer Monsoon Bursts in Climate Models: Insights From Present and Warming Climate Scenarios

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract This study investigates the complex dynamics of burst evolution in the Australian summer monsoon under present‐day and warmer climate conditions. Using reanalysis data, historical atmosphere‐only simulations (AMIP), and simulations with uniformly increased sea surface temperatures (+4K; AMIP+4K), we examine how seasonal‐mean precipitation and ...
Sarthak Mohanty, Christian Jakob, Martin S. Singh   +2 more
wiley   +1 more source

Subgrid-Scale Topographic Effects on Radiation for Global Weather Forecast Models

Atmosphere
The incoming solar radiation arriving the Earth’s surface is strongly influenced by surface terrain. Conventional global weather forecast models, with grid scales of about 10 km, lack the resolution to accurately capture terrain-induced variations.
Sunghye Baek, Junghan Kim
doaj   +1 more source

MARINE GEOID UNDULATION ASSESSMENT OVER SOUTH CHINA SEA USING GLOBAL GEOPOTENTIAL MODELS AND AIRBORNE GRAVITY DATA

, 2016
Global geopotential models (GGMs) are vital in computing global geoid undulations heights. Based on the ellipsoidal height by Global Navigation Satellite System (GNSS) observations, the accurate orthometric height can be calculated by adding precise and ...
N. M. Yazid, Ami Hassan Md Din, K. Omar, Z. A. A. Som, A. H. Omar, N. A. Z. Yahaya, A. Tugi   +6 more
semanticscholar   +1 more source

Evaluation of GFSv16 for Near‐Real‐Time Data Impact Studies During the Atmospheric River Reconnaissance Program 2022

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract Landfalling Atmospheric Rivers (ARs) are crucial for the water resources on the U.S. West Coast, but can also cause hazardous weather and water events there. Yet, accurately predicting AR impacts on precipitation remains a challenge. This study investigates the influence of dropsonde data from AR Reconnaissance (AR Recon) on improving weather ...
Vijay Tallapragada, Xingren Wu, Minghua Zheng, L. Delle Monache, F. Martin Ralph, Keqin Wu, Xiujun Wang, M. M. Nageswararao, Jia Wang, Anna M. Wilson, Jason Cordeira, Julie Kalansky, Daniel Steinhoff, Patrick Mulrooney   +13 more
wiley   +1 more source