Results 21 to 30 of about 4,394 (252)

Putting Phosphorus First: The Need to Know and Right to Know Call for a Revised Hierarchy of Natural Resources

open access: yesResources, 2017
The aim of this paper is to develop two concepts regarding phosphorus that will serve as a contribution fulfilling the call for intergenerational equity: to improve knowledge of future resources and to develop a framework by setting priorities for ...
Friedrich-W. Wellmer, Roland W. Scholz
doaj   +1 more source

The topographic bias in gravimetric geoid determination revisited

open access: yesJournal of Geodetic Science, 2019
The topographic potential bias at geoid level is the error of the analytically continued geopotential from or above the Earth’s surface to the geoid.
Sjöberg Lars E.
doaj   +1 more source

Past evolution of western Europe large-scale circulation and link to precipitation trend in the northern French Alps [PDF]

open access: yesWeather and Climate Dynamics, 2022
Detecting trends in regional large-scale circulation (LSC) is an important challenge as LSC is a key driver of local weather conditions. In this work, we investigate the past evolution of western Europe LSC based on the 500 hPa geopotential height fields
A. Blanc, J. Blanchet, J.-D. Creutin
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

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

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

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

A regional implementation of a mixed finite‐element, semi‐implicit dynamical core

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
A regional version of a new dynamical core with an iterated semi‐implicit time discretisation and mixed finite‐element spatial discretisation is described. This involves modifying the mixed‐system and Helmholtz‐preconditioner equations to use lateral boundary condition (LBC) data specified by a driving model.
Christine Johnson   +9 more
wiley   +1 more source

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