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| Titel |
Impact on aerosol emissions in China and India on local and global climate |
| VerfasserIn |
Thomas Kühn, Antti-Ilari Partanen, Svante V. Henriksson, Tommi Bergman, Anton Laakso, Harri Kokkola, Sami Romakkaniemi, Ari Laaksonen |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250081251
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| Zusammenfassung |
| Existing surface temperature records show warming in the beginning of last century, followed
by cooling starting from 1940 and again strong heating from 1975 until recent years. This
behaviour has been attributed to increase in the greenhouse gas and aerosol emission as well
as to natural variability of climate. Making a difference between these is crucial
as climate predictions and international policy related to emission reductions are
based on the models that are mainly evaluated against the historical temperature
records.
While in Europe and North America the aerosol emissions have decreased since the late
1970s, the emissions in China and India have started to increase dramatically at about the
same time and have only recently started to stagnate due to new regulations in China. Here
we use emission scenarios from the years 1996 through 2010 to assess the effect that these
emissions have on local aerosol properties and climate as well as on the global
climate.
We use the aerosol-climate model ECHAM5-HAM [Roeckner2003, Roeckner2004] to
simulate the local aerosol properties in China and India in the years 1996 through 2010, and
their impact on local as well as global climate. For anthropogenic aerosol greenhouse gas
emissions we use the ACCMIP-MACCity Aerocom emissions (Aerocom 2) [Lamarque2010]
in combination with the emissions for China and India after Lu et. al [Lu2011] for the
mentioned period of time.
To assess the effect of anthropogenic aerosol emissions on earth’s climate is assessed
using the ECHAM-HAM model coupled to a mixed layer ocean on a T42L19 grid. The
model is run with fixed yearly emissions for several emission scenarios (e.g. for the years
1996 and 2010), with data derived from 100-year averages. Additionally we run a number of
transient simulations (i.e. with varying yearly emissions) from 1996 to 2010 in the attempt to
extract a climate trend for the given period.
References
[Roeckner2003]Â Â Â Roeckner, E., Bäuml, R., Bonaventura, L., Brokopf, R., Esch, M.,
Giorgetta, M., Hagemann, S.,Kirchner, I., Kornblueh, L., Manzini, E., Rhodin, A.,
Schlese, U., Schulzweida, U., and Tompkins,A (2003). The atmospheric general
circulation model ECHAM5, Part I: Model description Tech. rep., Max-Planck
Institute for Meteorology, Hamburg, Germany
[Roeckner2004]Â Â Â Roeckner, E., Brokopf, R., Esch, M., Giorgetta, M., Hagemann,
S., Kornblueh, L., Manzini, E.,Schlese, U., and Schulzweida, U. (2004). The
atmospheric general circulation model ECHAM5, PartII: Sensitivity of simulated
climate to horizontal and vertical resolution Tech. rep., Max-PlanckInstitute for
Meteorology, Hamburg, Germany,
[Lamarque2010]Â Â Â J. F. Lamarque, et. al (2010). Historical (1850-2000) gridded
anthropogenic and biomass burning emissions of reactive gases and aerosols:
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[Lu2011]Â Â Â Z. Lu, Q. Zhang, and D. G. Streets Sulfur dioxide and primary
carbonaceous aerosol emissions in China and India, 1996-2010 (2011) Atmos.
Chem. Phys., 11, 9839 |
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