How important are future marine and shipping aerosol emissions in a warming Arctic summer and autumn?

Future sea ice retreat in the Arctic in summer and autumn is expected to affect both natural and anthropogenic aerosol emissions: sea ice acts as a barrier between the ocean and the atmosphere, and reducing it increases dimethyl sulfide and sea salt emissions. Additionally, a decrease in the area an...

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Bibliographic Details
Published in:Atmospheric chemistry and physics 2018-07, Vol.18 (14), p.10521-10555
Main Authors: Gilgen, Anina, Huang, Wan Ting Katty, Ickes, Luisa, Neubauer, David, Lohmann, Ulrike
Format: Article
Language:English
Subjects:
Aerosol effects
Aerosol particles
Aerosols
Albedo
Albedo (solar)
Anthropogenic factors
Arctic climates
Arctic temperatures
Atmosphere
Autumn
Black carbon
By-products
Cargo ships
Climate
Climate change
Climate models
Cloud condensation nuclei
Cloud droplet concentration
Cloud effects
Cloud properties
Clouds
Computer simulation
Condensation nuclei
Cooling
Cooling effects
Dimethyl sulfide
Dimethyl sulfide emissions
Distribution
Emissions
Emissions (Pollution)
Environmental aspects
Gases
Global aerosols
High temperature
Human influences
Human-environment interactions
Humidity
Ice
Ice cover
Ice environments
Ice thickness
Merchant ships
Meteorology
Nucleus
Oceans
Optical thickness
Precipitation
Radiation
Radiative forcing
Sea ice
Shipping
Shipping industry
Ships
Snow
Specific humidity
Sulfides
Sulphides
Summer
Surface temperature
Temperature effects
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Description
Summary:Future sea ice retreat in the Arctic in summer and autumn is expected to affect both natural and anthropogenic aerosol emissions: sea ice acts as a barrier between the ocean and the atmosphere, and reducing it increases dimethyl sulfide and sea salt emissions. Additionally, a decrease in the area and thickness of sea ice could lead to enhanced Arctic ship traffic, for example due to shorter routes of cargo ships. Changes in the emissions of aerosol particles can then influence cloud properties, precipitation, surface albedo, and radiation. Next to changes in aerosol emissions, clouds will also be affected by increases in Arctic temperatures and humidities. In this study, we quantify how future aerosol radiative forcings and cloud radiative effects might change in the Arctic in late summer (July-August) and early autumn (September-October).
ISSN:1680-7324
1680-7316
1680-7324
DOI:10.5194/acp-18-10521-2018