Results 1 to 10 of about 1,187,144 (257)

Rising geopotential height under global warming

Climate Dynamics, 2023
Abstract Geopotential height (H) is a widely used metric for atmospheric circulation. H has been reported to be rising under global warming, but the amplitude and mechanism of this rise are not clear. Based on reanalysis datasets and climate models participating in CMIP6, this study quantitatively evaluates the sensitivity of H to global mean ...
Chao He, Xiaolong Chen, Matthew Collins, Fengfei Song, Yamin Hu, Xingwen Jiang, Yanju Liu, Yihui Ding, Wen Zhou   +8 more
openaire   +3 more sources

Global Geopotential Models assessment in Ecuador based on geoid heights and geopotential values

Journal of Geodetic Science, 2023
Since the 1960s, the analysis of disturbed satellite orbits to infer Earth’s gravity field functionals has been an important element in determining the Earth’s gravitational field. The long wavelengths of the gravitational field are recovered through the
Carrión José, Flores Fredy, Rodríguez Freddy, Pozo Miguel   +3 more
doaj   +2 more sources

The Arctic Oscillation Signature in the Wintertime Geopotential Height and Temperature Fields [PDF]

Geophysical Research Letters, 1998
The leading empirical orthogonal function of the wintertime sea‐level pressure field is more strongly coupled to surface air temperature fluctuations over the Eurasian continent than the North Atlantic Oscillation (NAO). It resembles the NAO in many respects; but its primary center of action covers more of the Arctic, giving it a more zonally symmetric
Thompson, David W. J., Wallace, John M.
openaire   +3 more sources

Validation of the Aura Microwave Limb Sounder temperature and geopotential height measurements [PDF]

Journal of Geophysical Research: Atmospheres, 2008
Global satellite observations of temperature and geopotential height (GPH) from the Microwave Limb Sounder (MLS) on the EOS Aura spacecraft are discussed. The precision, resolution, and accuracy of the data produced by the MLS version 2.2 processing algorithms are quantified, and recommendations for data screening are made. Temperature precision is 1 K
Schwartz, M., Lambert, A., Manney, G. L., Read, W. G., Livesey, N. J., Froidevaux, L., Ao, C. O., Bernath, P. F., Boone, C. D., Cofield, R. E., Daffer, W. H., Drouin, B. J., Fetzer, E. J., Fuller, R.A., Jarnot, R.F., Jiang, J.H., Jiang, Y.B., Knosp, B.W., Krüger, Kirstin, Li, J.-L.F., Mlynczak, M.G., Pawson, S., Russell III, J.M., Santee, M.L., Snyder, W.V., Stek, P.C., Thurstans, R.P., Tompkins, A.M., Wagner, P.A., Walker, K.A., Waters, J.W., Wu, D.L.   +31 more
openaire   +3 more sources

Solar wind-driven geopotential height anomalies originate in the Antarctic lower troposphere [PDF]

Geophysical Research Letters, 2014
We use National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data to estimate the altitude and time lag dependence of the correlation between the interplanetary magnetic field component, By, and the geopotential height anomaly above Antarctica.
Lam, Mai Mai, Chisham, Gareth, Freeman, Mervyn   +2 more
openaire   +3 more sources

850 hPa Geopotential Height Link with Iraqi Precipitation and Temperature [PDF]

Revista Brasileira de Meteorologia
The study examines the connection between the geopotential height (Z850 hPa) and the temperature (°C) and precipitation (mm) in Iraq. The observation data for climatological parameters that are currently available from the Iraqi meteorological ...
Jasim Al-Khalidi, Dher Bakr, Rudainah Sedeeq, Lara Faleh   +3 more
doaj   +2 more sources

Association of geopotential height patterns with heavy rainfall events in Cyprus [PDF]

Advances in Geosciences, 2010
Dynamically induced rainfall is strongly connected with synoptic atmospheric circulation patterns at the upper levels. This study investigates the relationship between days of high precipitation volume events in the eastern Mediterranean and the ...
F. Tymvios, K. Savvidou, S. C. Michaelides   +2 more
doaj   +2 more sources

Asymmetric Geopotential Height Fluctuations from Symmetric Winds

Journal of the Atmospheric Sciences, 1996
Abstract As a characterization of the variability of observed geopotential height fluctuations, their probability density function (PDF) and its skewness are studied in the global domain for winter and summer. The PDF of the geopotential, Φ, is skewed toward low anomalies at midiatitudes and toward high anomalies in polar and tropical regions.
M. Holzer
openaire   +2 more sources

Persistent positive anomalies in geopotential heights drive enhanced wildfire activity across Europe. [PDF]

Philos Trans R Soc Lond B Biol Sci
Persistent positive anomalies in 500 hPa geopotential height (PPAs) are upper-air circulation patterns associated with surface heatwaves, drought, and consequently fuel aridity, elevated fire weather, and active wildfires. We examined the association between PPA events and surface fire weather and burned area at a pan-European level.
Little K, Castellanos-Acuna D, Jain P, Graham L, Kettridge N, Flannigan M.   +5 more
europepmc   +4 more sources

The Evaluation of Winds from Geopotential Height Data in the Stratosphere

Journal of the Atmospheric Sciences, 1987
Abstract Several methods of obtaining horizontal wind fields in the extratropical stratosphere from geopotential height data are evaluated and compared to geostrophic estimates, with focus on the poleward fluxes of momentum and heat and on the resulting Eliassen–Palm (EP) flux divergence estimates. Winds derived from a coupled iterative solution of the
W. Randel
openaire   +2 more sources