Results 21 to 30 of about 2,567 (220)

A preliminary experiment of determining the geopotential difference using two hydrogen atomic clocks and TWSTFT technique

open access: yesGeodesy and Geodynamics, 2020
General relativity theory (GRT) concludes that a precise clock ticks at different running rates if it is under the influence of different geopotentials.
Kuangchao Wu   +5 more
doaj   +1 more source

Development of an idealised downstream cyclone: Eulerian and Lagrangian perspective on the kinetic energy [PDF]

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2013
In this idealised modelling study, the development of a downstream cyclone, which closely follows the life-cycle of a Shapiro-Keyser cyclone, is addressed from a quasi-geostrophic kinetic energy perspective.
Lukas Papritz, Sebastian Schemm
doaj   +1 more source

Geoid Studies in Two Test Areas in Greece Using Different Geopotential Models towards the Estimation of a Reference Geopotential Value

open access: yesRemote Sensing, 2023
In the present study, we first examine the contribution of different, satellite-only or combined, global geopotential models in geoid computation employing the remove–compute–restore approach. For this reason, two test areas of about 100 km2 each, one in
Vassilios N. Grigoriadis   +4 more
doaj   +1 more source

Two Case Studies of the Northwestern Argentinean Low: With and without a Coupled Transient Trough

open access: yesAtmosphere, 2023
The Northwestern Argentinean Low (NAL) intensifies the zonal component of the geopotential gradient to its east, intensifying the meridional wind and moisture flow from the tropics to the subtropics contibuting importantly to the South American Low-Level
Josefina M. Arraut   +3 more
doaj   +1 more source

Evaluation of the geopotential value W0LVD of China

open access: yesGeodesy and Geodynamics, 2017
Estimation of the zero-height geopotential value W0LVD for the CVD (China Vertical Datum) plays a fundamental role in the connection of traditional height reference systems into a global height system.
Lin He, Yonghai Chu, Nan Yu
doaj   +1 more source

Dry–Hot Compound Events Driving the 2024 Pantanal Wildfires

open access: yesInternational Journal of Climatology, EarlyView.
Extreme wildfires in the Pantanal in 2024 were driven by a cascade of heatwaves, rainfall deficits and the absence of the annual flood pulse. These conditions dried soils and rivers, enhanced fuel accumulation and enabled early and intense fire outbreaks.
Liz B. C. Belém   +14 more
wiley   +1 more source

Along-Track Geopotential Difference and Deflection of the Vertical from GRACE Range Rate: Use of GEOGRACE

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2016
We present a theory and numerical algorithm to directly determine the time-varying along-track geopotential difference and deflection of the vertical at the Gravity Recovery and Climate Experiment (GRACE) satellite altitude.
GRACE   +4 more
doaj   +1 more source

Spatiotemporal Changes in Precipitation Concentration in the Atlantic‐European Region

open access: yesInternational Journal of Climatology, EarlyView.
This study analyses changes in precipitation concentration using ERA5 and E‐OBS datasets. Gini index as a measure of precipitation concentration revealed a gradual expansion of areas with increasing unevenness in precipitation distribution across the Atlantic‐European region since 1961.
Petr Dobrovolný   +4 more
wiley   +1 more source

Improved Estimation of Regional Surface Mass Variations from GRACE Intersatellite Geopotential Differences Using a Priori Constraints

open access: yesRemote Sensing, 2020
We presented an improved method for estimation of regional surface mass variations from the Gravity Recovery and Climate Experiment (GRACE)-derived precise intersatellite geopotential differences using a priori constraints.
Bo Zhong   +4 more
doaj   +1 more source

Characterizing quasi-biweekly variability of the Asian monsoon anticyclone using potential vorticity and large-scale geopotential height field [PDF]

open access: yesAtmospheric Chemistry and Physics, 2020
The spatial pattern of subseasonal variability of the Asian monsoon anticyclone is analyzed using long-term reanalysis data, focusing on the large-scale longitudinal movement.
A. Amemiya, K. Sato
doaj   +1 more source

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