Observations of backscatter, particle concentration and frost point in north polar vortex stratospheric clouds

1990 ◽  
Vol 17 (9) ◽  
pp. 1271-1274 ◽  
Author(s):  
James M. Rosen ◽  
Norman T. Kjome ◽  
Samuel J. Oltmans
Keyword(s):  
Particle Concentration ◽  
Polar Vortex ◽  
Frost Point ◽  
North Polar ◽  
North Polar Vortex ◽  
Stratospheric Clouds

A 3D simulation of the early winter distribution of reactive chlorine in the north polar vortex

1993 ◽  
Vol 20 (12) ◽  
pp. 1271-1274 ◽  
Author(s):  
A. Douglass ◽  
R. Rood ◽  
J. Waters ◽  
L. Froidevaux ◽  
W. Read ◽  
...  
Keyword(s):  
Polar Vortex ◽  
3D Simulation ◽  
Early Winter ◽  
The North ◽  
Winter Distribution ◽  
North Polar ◽  
North Polar Vortex

Has the stratospheric HCl in the Northern Hemisphere been increasing since 2005

2020 ◽  
Author(s):  
Yuanyuan Han ◽  
Wenshou Tian ◽  
Fei Xie
Keyword(s):  
Northern Hemisphere ◽  
Linear Trend ◽  
Polar Vortex ◽  
Joint Effect ◽  
Residual Circulation ◽  
Quasi Biennial Oscillation ◽  
Middle Latitudes ◽  
North Polar ◽  
North Polar Vortex ◽  
Biennial Oscillation

<p>Stratospheric hydrogen chloride (HCl) is the main stratospheric reservoir of chlorine, deriving from the decomposition of chlorine-containing source gases. Its trend has been used as a metrics of ozone depletion or recovery. Using the latest satellite observations, the authors find that a significant increase of Northern Hemisphere stratospheric HCl during 2010–2011 can mislead trends of HCl in recent decades. Agree with previous studies, HCl increased from 2005 to 2011; while when removing the large increase of stratospheric HCl during 2010–2011, the increasing linear trend from 2005 to 2011 becomes weak and insignificant, in addition, the linear trend of Northern Hemisphere stratospheric HCl from 2005 to 2016 also shows weak and insignificant. The significant increase of HCl during 2010–2011 is attributed to a super strong north polar vortex and a reduced residual circulation during 2010–2011, which slowed down the transport of HCl from the low–mid latitudes to the high latitudes, leading to accumulation of HCl in the middle latitudes of the stratosphere during 2010–2011. Further analysis suggests that the strong polar vortex and the reduced residual circulation were caused by the joint effect of a La Niña event and the west phase of the quasi-biennial oscillation.</p>

Penetration of Mt. Pinatubo aerosols into the north polar vortex

1992 ◽  
Vol 19 (17) ◽  
pp. 1751-1754 ◽  
Author(s):  
James M. Rosen ◽  
Norman T. Kjome ◽  
Hans Fast ◽  
Vyacheslav U. Khattatov ◽  
Vladimir V. Rudakov
Keyword(s):  
Polar Vortex ◽  
The North ◽  
North Polar ◽  
North Polar Vortex

scholarly journals Saturn's North Polar Vortex Structure Extracted From Cloud Images by the Optical Flow Method

2019 ◽  
Vol 124 (11) ◽  
pp. 3041-3062 ◽  
Author(s):  
Tianshu Liu ◽  
Kunio M. Sayanagi ◽  
Shawn R. Brueshaber ◽  
John J. Blalock ◽  
Andrew P. Ingersoll ◽  
...  
Keyword(s):  
Optical Flow ◽  
Vortex Structure ◽  
Polar Vortex ◽  
Flow Method ◽  
Optical Flow Method ◽  
North Polar ◽  
North Polar Vortex

scholarly journals Stratospheric water vapour as tracer for Vortex filamentation in the Arctic winter 2002/2003

2003 ◽  
Vol 3 (6) ◽  
pp. 1991-1997 ◽  
Author(s):  
M. Müller ◽  
R. Neuber ◽  
F. Fierli ◽  
A. Hauchecorne ◽  
H. Vömel ◽  
...  
Keyword(s):  
Water Vapour ◽  
Large Scale ◽  
Polar Vortex ◽  
The Arctic ◽  
Edge Region ◽  
Particle Sedimentation ◽  
Frost Point ◽  
Lagrangian Advection ◽  
Stratospheric Clouds ◽  
Stratospheric Water Vapour

Abstract. Balloon-borne frost point hygrometers measured three high-resolution profiles of stratospheric water vapour above Ny-Ålesund, Spitsbergen during winter 2002/2003. The profiles obtained on 12 December 2002 and on 17 January 2003 provide an insight into the vertical distribution of water vapour in the core of the polar vortex. The water vapour sounding on 11 February 2003 was obtained within the vortex edge region of the lower stratosphere. Here, a significant reduction of water vapour mixing ratio was observed between 16 and 19 km. The stratospheric temperatures indicate that this dehydration was not caused by the presence of polar stratospheric clouds or earlier PSC particle sedimentation. Ozone observations on this day indicate a large scale movement of the polar vortex and show laminae in the same altitude range as the water vapour profile. The link between the observed water vapour reduction and filaments in the vortex edge region is indicated in the results of the semi-lagrangian advection model MIMOSA, which show that adjacent filaments of polar and mid latitude air can be identified above the Spitsbergen region. A vertical cross-section produced by the MIMOSA model reveals that the water vapour sonde flew through polar air in the lowest part of the stratosphere below 425 K, then passed through filaments of mid latitude air with lower water vapour concentrations, before it finally entered the polar vortex above 450 K. These results indicate that on 11 February 2003 the frost point hygrometer measured different water vapour concentrations as the sonde detected air with different origins. Instead of being linked to dehydration due to PSC particle sedimentation, the local reduction in the stratospheric water vapour profile was in this case caused by dynamical processes in the polar stratosphere.

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