Results 11 to 20 of about 538,294 (297)
Observations of meteoric material and implications for aerosol nucleation in the winter Arctic lower stratosphere derived from in situ particle measurements [PDF]
Atmospheric Chemistry and Physics, 2005 Number concentrations of total and non-volatile aerosol particles with size diameters >0.01 μm as well as particle size distributions (0.4–23 μm diameter) were measured in situ in the Arctic lower stratosphere (10–20.5 km altitude). The
J. Curtius +13 more
doaj +3 more sources
Polar Vortex Disruptions by High Latitude Ocean Warming [PDF]
Geophysical Research LettersMid‐latitude extreme cold outbreaks are associated with disruptions of the polar vortex, which often happen abruptly in connection to a sudden stratospheric warming.
Mostafa E. Hamouda +2 more
doaj +3 more sources
Polar vortex crystals: Emergence and structure. [PDF]
Proc Natl Acad Sci U S A, 2022 Vortex crystals are quasiregular arrays of like-signed vortices in solid-body rotation embedded within a uniform background of weaker vorticity. Vortex crystals are observed at the poles of Jupiter and in laboratory experiments with magnetized electron plasmas in axisymmetric geometries.
Siegelman L, Young WR, Ingersoll AP.
europepmc +7 more sources
The formation and evolution of Titan's winter polar vortex. [PDF]
Nat Commun, 2017 AbstractSaturn’s largest moon Titan has a substantial nitrogen-methane atmosphere, with strong seasonal effects, including formation of winter polar vortices. Following Titan’s 2009 northern spring equinox, peak solar heating moved to the northern hemisphere, initiating south-polar subsidence and winter polar vortex formation.
Teanby NA +8 more
europepmc +11 more sources
Vortex Polarity Switching by a Spin-Polarized Current [PDF]
Physical Review Letters, 2007 The spin-transfer effect is investigated for the vortex state of a magnetic nanodot. A spin current is shown to act similarly to an effective magnetic field perpendicular to the nanodot. Then a vortex with magnetization (polarity) parallel to the current polarization is energetically favorable.
Caputo, J.G. +3 more
openaire +4 more sources
Forecasting extreme stratospheric polar vortex events. [PDF]
Nat Commun, 2020 AbstractExtreme polar vortex events known as sudden stratospheric warmings can influence surface winter weather conditions, but their timing is difficult to predict. Here, we examine factors that influence their occurrence, with a focus on their timing and vertical extent. We consider the roles of the troposphere and equatorial stratosphere separately,
Gray LJ +6 more
europepmc +6 more sources
Singularities of Partially Polarized Vortex Beams [PDF]
Frontiers in Physics, 2020 In this paper we look at three ways to define singularities in a partially coherent electromagnetic beam with non-uniform polarization. A simple model of such a beam is developed to highlight features of such singularities.
William Scott Raburn, Greg Gbur
openaire +2 more sources
Air mass exchange across the polar vortex edge during a simulated major stratospheric warming [PDF]
Annales Geophysicae, 1995 The dynamics of the polar vortex in winter and spring play an important role in explaining observed low ozone values. A quantification of physical and chemical processes is necessary to obtain information about natural and anthropogenic causes of ...
G. Günther, M. Dameris
doaj +1 more source
Earth, Planets and Space, 2023 The impact of strong and weak stratospheric polar vortices on geomagnetic semidiurnal solar and lunar tides is investigated during Northern Hemisphere (NH) winters using ground-based magnetic field observations at the Huancayo (12.05° S, 284.67° E ...
Sunil Kumar +4 more
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Cassini ISS observation of Saturn’s north polar vortex and comparison to the south polar vortex [PDF]
Icarus, 2017 We present analyses of Saturn’s north pole using high-resolution images captured in late 2012 by the Cassini spacecraft’s Imaging Science Subsystem (ISS) camera. The images reveal the presence of an intense cyclonic vortex centered at the north pole.
Kunio M. Sayanagi +4 more
openaire +2 more sources