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Ozone loss and chlorine activation in the Arctic winters 1991-2003 derived with the tracer-tracer correlations
Ozone loss chlorine activation Arctic winters tracer-tracer correlations
2009/3/9
Chemical ozone loss in the Arctic stratosphere was investigated for the twelve years between 1991 and 2003 employing the ozone-tracer correlation method. For this method, the change in the relation be...
Diurnal and annual variations of meteor rates at the arctic circle
meteor rates arctic circle Diurnal and annual variations
2009/3/4
Meteors are an important source for (a) the metal atoms of the upper atmosphere metal layers and (b) for condensation nuclei, the existence of which are a prerequisite for the formation of noctilucent...
Trace gas transport in the 1999/2000 Arctic winter: comparison of nudged GCM runs with observations
Trace gas transport Arctic winter nudged GCM runs
2009/2/20
We have compared satellite and balloon observations of methane (CH4) and hydrogen fluoride (HF) during the Arctic winter 1999/2000 with results from the MA-ECHAM4 middle atmospheric general circulatio...
Supersaturation, dehydration, and denitrification in Arctic cirrus
Supersaturation dehydration denitrification Arctic cirrus
2009/2/12
A polar cirrus case study is discussed with the help of a one-dimensional model with explicit aerosol and ice microphysics. It is demonstrated that continuous cooling of air in regions with small amou...
Ozone loss derived from balloon-borne tracer measurements in the 1999/2000 Arctic winter
Ozone loss balloon-borne tracer measurements Arctic winter
2009/2/10
Balloon-borne measurements of CFC11 (from the DIRAC in situ gas chromatograph and the DESCARTES grab sampler), ClO and O3 were made during the 1999/2000 Arctic winter as part of the SOLVE-THESEO 2000...
Rapid meridional transport of tropical airmasses to the Arctic during the major stratospheric warming in January 2003
Rapid meridional transport tropical airmasses Arctic
2009/2/9
We present observations of unusually high values of ozone and N2O in the middle stratosphere that were observed by the airborne submillimeter radiometer ASUR in the Arctic. The observations took place...
2002-2003 Arctic ozone loss deduced from POAM III satellite observations and the SLIMCAT chemical transport model
Arctic ozone loss POAM III satellite observations SLIMCAT chemical transport model
2009/2/7
The SLIMCAT three-dimensional chemical transport model (CTM) is used to infer chemical ozone loss from Polar Ozone and Aerosol Measurement (POAM) III observations of stratospheric ozone during the Arc...
Vortex-averaged Arctic ozone depletion in the winter 2002/2003
Vortex-averaged Arctic ozone depletion winter SAOZ data
2009/1/23
A total ozone depletion of 68±7 Dobson units between 380 and 525K from 10 December 2002 to 10 March 2003 is derived from ozone sonde data by the vortex-average method, taking into account both diabati...
Observations of lunar tides in the mesosphere and lower thermosphere at Arctic and middle latitudes
lunar tides mesosphere lower thermosphere Arctic middle latitudes
2009/1/15
Meteor radars have been used to measure the horizontal winds in the mesosphere and lower thermosphere over Castle Eaton (52° N) in the UK and over Esrange (68° N) in Arctic Sweden. We consider a 16-ye...
3-D microphysical model studies of Arctic denitrification: comparison with observations
3-D microphysical model Arctic denitrification
2009/1/14
Simulations of Arctic denitrification using a 3-D chemistry-microphysics transport model are compared with observations for the winters 1994/95, 1996/97 and 1999/2000. The model of Denitrification by ...
Observations of meteoric material and implications for aerosol nucleation in the winter Arctic lower stratosphere derived from in situ particle measurements
meteoric material aerosol nucleation winter Arctic lower stratosphere situ particle easurements
2009/1/14
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 str...
UV radiation below an Arctic vortex with severe ozone depletion
UV radiation Arctic vortex ozone depletion
2009/1/14
The erythemally weighted (UV) irradiance below the severely depleted Arctic vortices in spring 1996 and 1997 were substantially elevated. On average the UV increased 36 and 33% relative to the 1979-19...
Chemical ozone loss in the Arctic winter 2002/2003 determined with Match
Chemical ozone loss Arctic winter
2009/1/13
The Match technique was used to determine chemically induced ozone loss inside the stratospheric vortex during the Arctic winter 2002/2003. From end of November 2002, which is the earliest start of a ...
Regional aerosol optical properties and radiative impact of the extreme smoke event in the European Arctic in spring 2006
Regional aerosol optical properties radiative impact extreme smoke event European Arctic
2008/12/25
In spring 2006 a special meteorological situation occurred in the European Arctic region giving record high levels of air pollution. The synoptic situation resulted in extensive transport of pollution...
Record high peaks in PCB concentrations in the Arctic atmosphere due to long-range transport of biomass burning emissions
PCB Arctic atmosphere long-range transport biomass burning emissions
2008/12/18
Soils and forests in the boreal region of the Northern Hemisphere are recognised as having a large capacity for storing air-borne Persistent Organic Pollutants (POPs), such as the polychlorinated biph...