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Overview of sun photometer measurements of aerosol properties in Scandinavia and Svalbard
Abstract An overview on the data of columnar aerosol properties measured in Northern Europe is provided. Apart from the necessary data gathered in the Arctic, the knowledge of the aerosol loading in nearby areas (e.g. sub-Arctic) is of maximum interest to achieve a correct analysis of the Arctic aerosols and transport patterns. This work evaluates data from operational sites with sun photometer measurements belonging either to national or international networks (AERONET, GAW-PFR) and programs conducted in Scandinavia and Svalbard. We enumerate a list of sites, measurement type and periods together with observed aerosol properties. An evaluation and analysis of aerosol data was carried out with a review of previous results as well. Aerosol optical depth (AOD) and Ångström exponent (AE) are the current parameters with sufficient long-term records for a first evaluation of aerosol properties. AOD (500 nm) ranges from 0.08 to 0.10 in Arctic and sub-Arctic sites (Ny-Ålesund: 0.09; Andenes: 0.10; Sodankylä: 0.08), and it is somewhat higher in more populated areas in Southern Scandinavia (AOD about 0.10–0.12 at 500 nm). On the Norwegian coast, aerosols show larger mean size (AE = 1.2 at Andenes) than in Finland, with continental climate (AE = 1.5 at Sodankylä). Columnar particle size distributions and related parameters derived from inversion of sun/sky radiances were also investigated. This work makes special emphasis in the joint and collaborative effort of the various groups from different countries involved in this study. Part of the measurements presented here were involved in the IPY projects Polar-AOD and POLARCAT.
Highlights ► Different AOD seasonality is found in Svalbard, northern and southern Scandinavia. ► In the European sub-Arctic region (about 65–70°N) the spring haze is not persistent. ► Sources in Eastern Europe produce a spring AOD peak over southern Scandinavia. ► Fine mode aerosols are predominant and their variations determine the seasonal aerosol variability. ► The coarse mode aerosol concentrations are very low except for coastal sites.
Overview of sun photometer measurements of aerosol properties in Scandinavia and Svalbard
Abstract An overview on the data of columnar aerosol properties measured in Northern Europe is provided. Apart from the necessary data gathered in the Arctic, the knowledge of the aerosol loading in nearby areas (e.g. sub-Arctic) is of maximum interest to achieve a correct analysis of the Arctic aerosols and transport patterns. This work evaluates data from operational sites with sun photometer measurements belonging either to national or international networks (AERONET, GAW-PFR) and programs conducted in Scandinavia and Svalbard. We enumerate a list of sites, measurement type and periods together with observed aerosol properties. An evaluation and analysis of aerosol data was carried out with a review of previous results as well. Aerosol optical depth (AOD) and Ångström exponent (AE) are the current parameters with sufficient long-term records for a first evaluation of aerosol properties. AOD (500 nm) ranges from 0.08 to 0.10 in Arctic and sub-Arctic sites (Ny-Ålesund: 0.09; Andenes: 0.10; Sodankylä: 0.08), and it is somewhat higher in more populated areas in Southern Scandinavia (AOD about 0.10–0.12 at 500 nm). On the Norwegian coast, aerosols show larger mean size (AE = 1.2 at Andenes) than in Finland, with continental climate (AE = 1.5 at Sodankylä). Columnar particle size distributions and related parameters derived from inversion of sun/sky radiances were also investigated. This work makes special emphasis in the joint and collaborative effort of the various groups from different countries involved in this study. Part of the measurements presented here were involved in the IPY projects Polar-AOD and POLARCAT.
Highlights ► Different AOD seasonality is found in Svalbard, northern and southern Scandinavia. ► In the European sub-Arctic region (about 65–70°N) the spring haze is not persistent. ► Sources in Eastern Europe produce a spring AOD peak over southern Scandinavia. ► Fine mode aerosols are predominant and their variations determine the seasonal aerosol variability. ► The coarse mode aerosol concentrations are very low except for coastal sites.
Overview of sun photometer measurements of aerosol properties in Scandinavia and Svalbard
Toledano, C. (author) / Cachorro, V.E. (author) / Gausa, M. (author) / Stebel, K. (author) / Aaltonen, V. (author) / Berjón, A. (author) / Ortiz de Galisteo, J.P. (author) / de Frutos, A.M. (author) / Bennouna, Y. (author) / Blindheim, S. (author)
Atmospheric Environment ; 52 ; 18-28
2011-10-11
11 pages
Article (Journal)
Electronic Resource
English
Size distributions and chemical properties of aerosol at Ny Aalesund, Svalbard
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