搜索结果: 16-30 共查到“大气化学 Arctic”相关记录52条 . 查询时间(0.078 秒)
The effect of Arctic sea-ice extent on the absorbed（net）solar flux at the surface, based on ISCCP-D2 cloud data for 1983–2007
Arctic sea-ice absorbed solar flux ISCCP-D2 cloud data
2010/2/1
We estimate the effect of the Arctic sea ice on the absorbed (net) solar flux using a radiative transfer model. Ice and cloud input data to the model come from satellite observations, processed by the...
Correlations of mesospheric winds with subtle motion of the Arctic polar vortex
mesospheric winds subtle motion Arctic polar vortex
2010/2/1
This paper investigates the relationship between high latitude upper mesospheric winds and the state of the stratospheric polar vortex in the absence of major sudden stratospheric warmings. A ground b...
The effect of misleading surface temperature estimations on the sensible heat fluxes at a high Arctic site – the Arctic Turbulence Experiment 2006 on Svalbard (ARCTEX-2006)
misleading surface temperature sensible heat fluxes ARCTEX
2010/1/18
The observed rapid climate warming in the Arctic requires improvements in permafrost and carbon cycle monitoring, accomplished by setting up long-term observation sites with high-quality in-situ measu...
Evidence of ice crystals at cloud top of Arctic boundary-layer mixed-phase clouds derived from airborne remote sensing
ice crystals Arctic boundary-layer mixed-phase clouds airborne remote sensing
2009/12/31
The vertical distribution of ice crystals in Arctic boundary-layer mixed-phase (ABM) clouds was investigated by airborne remote-sensing and in situ measurements during the Arctic Study of Tropospheric...
Wildfire smoke in the Siberian Arctic in summer: source characterization and plume evolution from airborne measurements
Wildfire smoke Siberian Arctic summer source characterization airborne measurements
2009/12/31
We present airborne measurements of carbon dioxide (CO2), carbon monoxide (CO), ozone (O3), equivalent black carbon (EBC) and ultra fine particles over North-Eastern Siberia in July 2008 performed dur...
Microphysical and optical properties of Arctic mixed-phase clouds. The 9 April 2007 case study.
Microphysical optical properties Arctic mixed-phase clouds
2009/9/14
Airborne measurements in Arctic boundary-layer stratocumulus were carried out near Spitsbergen on 9 April 2007 during the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign. A...
The two-day wave in the Antarctic and Arctic mesosphere and lower thermosphere
two-day wave Antarctic Arctic mesosphere lower thermosphere
2009/9/11
There have been comparatively few studies reported of the 2-day planetary wave in the middle atmosphere at polar latitudes. Here we report on a study made using high-latitude meteor radars at Rothera ...
The governing processes and timescales of stratosphere-to-troposphere transport and its contribution to ozone in the Arctic troposphere
stratosphere-to-troposphere transport ozone Arctic troposphere
2009/5/15
We used the seasonality of a combination of atmospheric trace gases and idealized tracers to examine stratosphere-to-troposphere transport and its influence on tropospheric composition in the Arctic. ...
Properties of aerosols and their wet deposition in the arctic spring during ASTAR2004 at Ny-Alesund, Svalbard
aerosols their wet deposition arctic spring Ny-Alesund Svalbard
2009/3/12
During the period of scientific campaign "Arctic Study of Tropospheric Aerosols, Clouds and Radiation 2004" (ASTAR2004), precipitation samples were collected in late spring at Ny-Alesund, Svalbard and...
Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records
Surface ozone depletion episodes Arctic Antarctic historical ozonesonde
2009/3/12
Episodes of ozone depletion in the lowermost Arctic atmosphere (0--2 km) at polar sunrise have been intensively studied at Alert, Canada, and are thought to result from catalytic reactions involving b...
Stratospheric water vapour as tracer for Vortex filamentation in the Arctic winter 2002/2003
Stratospheric water vapour Vortex filamentation Arctic winter
2009/3/11
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 Dec...
The impact of model grid zooming on tracer transport in the 1999/2000 Arctic polar vortex
model grid zooming tracer transport Arctic polar vortex
2009/3/11
We have used a 3D chemistry transport model to evaluate the transport of HF and CH4 in the stratosphere during the Arctic winter of 1999/2000. Several model experiments were carried out with the use o...
The North Atlantic Oscillation controls air pollution transport to the Arctic
North Atlantic Oscillation air pollution the Arctic
2009/3/11
This paper studies the interannual variability of pollution pathways from northern hemisphere (NH) continents into the Arctic. Using a 15-year model simulation of the dispersion of passive tracers rep...
Factors controlling Arctic denitrification in cold winters of the 1990s
Factors controlling Arctic denitrification cold winters the 1990s
2009/3/10
Denitrification of the Arctic winter stratosphere has been calculated using a 3-D microphysical model for the winters 1994/95, 1995/96, 1996/97 and 1999/2000. Denitrification is assumed to occur throu...
The origin of sea salt in snow on Arctic sea ice and in coastal regions
sea salt snow Arctic sea ice coastal regions
2009/3/10
Snow, through its trace constituents, can have a major impact on lower tropospheric chemistry, as evidenced by ozone depletion events (ODEs) in oceanic polar areas. These ODEs are caused by the chemis...