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| Titel |
Continuous measurements of aerosol particles in Arctic Russia and Finland |
| VerfasserIn |
Eija Asmi, Vladimir Kondratyev, David Brus, Heikki Lihavainen, Tuomas Laurila, Mika Aurela, Juha Hatakka, Yrjö Viisanen, Alexander Reshetnikov, Victor Ivakhov, Taneil Uttal, Alexander Makshtas |
| 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 |
250073314
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| Zusammenfassung |
| The Arctic and northern boreal regions of Eurasia are experiencing rapid environmental
changes due to pressures by human activities. The largest anthropogenic climate forcings are
due to aerosol particles and greenhouse gases (GHGs). The Arctic environment is highly
sensitive to changes in aerosol concentrations or composition, largely due to the high surface
reflectance for the most part of the year. Concentrations of aerosols in winter and spring
Arctic are affected by ’Arctic Haze’, a phenomenon suggested to arise from the transport of
pollutants from lower latitudes and further strengthened by the strong stratification of the
Arctic wintertime atmosphere. Sources and transport patterns of aerosols into the Arctic are,
however, not fully understood.
In order to monitor the changes within the Arctic region, as well as to understand the
sources and feedback mechanisms, direct measurements of aerosols within the Arctic are
needed. So far, direct year-round observations have been inadequate especially within the
Russian side of the Arctic. This is the reason why a new climate observatory was founded in
Tiksi, Russia.
Tiksi meteorological observatory in northern Siberia (71o 36′ N; 128o 53′ E) on the shore
of the Laptev Sea has been operating since 1930s. Recently, it was upgraded and joint in the
network of the IASOA, in the framework of the International Polar Year Activity project. The
project is run in collaboration between National Oceanic and Atmospheric Administration
(NOAA) with the support of the National Science Foundation (NSF), Roshydromet (AARI
and MGO units), government of the Republic of Sakha (Yakutia) and the Finnish
Meteorological Institute (FMI).
The research activities of FMI in Tiksi include e.g. continuous long-term measurements
of aerosol physical properties, which have been successfully continued since summer 2010.
These, together with the FMI measurements in Pallas station in northern Finland since 1999,
provide important information on the year-round Arctic aerosol concentrations and
properties.
Here, we will present the annual cycle of Arctic aerosol concentrations, which is
characterized by winter minimum and spring and summer maxima. We will show the most
important Arctic aerosol source regions and their variability with seasons. Also, we will look
the processes such as new particle formation, which takes frequently place at both the two
stations and in particular in spring season. |
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