Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic
Light-absorbing impurities (LAIs) deposited in snow have the potential to substantially affect the snow radiation budget, with subsequent implications for snow melt. To more accurately quantify the snow albedo, the contribution from different LAIs needs to be assessed. Here we estimate the main LAI...
Published in: | Atmospheric Measurement Techniques |
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COPERNICUS GESELLSCHAFT MBH
2018
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Online Access: | http://hdl.handle.net/10138/233906 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/233906 |
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Open Polar |
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HELDA – University of Helsinki Open Repository |
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ftunivhelsihelda |
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English |
topic |
BLACK CARBON ABSORBING IMPURITIES ICE CORE THERMAL/OPTICAL ANALYSIS ATMOSPHERIC AEROSOLS TIBETAN PLATEAU SPECTRAL ALBEDO NORTHERN INDIA MIXING STATE PARTICLES 1172 Environmental sciences 116 Chemical sciences |
spellingShingle |
BLACK CARBON ABSORBING IMPURITIES ICE CORE THERMAL/OPTICAL ANALYSIS ATMOSPHERIC AEROSOLS TIBETAN PLATEAU SPECTRAL ALBEDO NORTHERN INDIA MIXING STATE PARTICLES 1172 Environmental sciences 116 Chemical sciences Svensson, Jonas Strom, Johan Kivekas, Niku Dkhar, Nathaniel B. Tayal, Shresth Sharma, Ved P. Jutila, Arttu Backman, John Virkkula, Aki Ruppel, Meri Hyvarinen, Antti Kontu, Anna Hannula, Henna-Reetta Lepparanta, Matti Hooda, Rakesh K. Korhola, Atte Asmi, Eija Lihavainen, Heikki Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic |
topic_facet |
BLACK CARBON ABSORBING IMPURITIES ICE CORE THERMAL/OPTICAL ANALYSIS ATMOSPHERIC AEROSOLS TIBETAN PLATEAU SPECTRAL ALBEDO NORTHERN INDIA MIXING STATE PARTICLES 1172 Environmental sciences 116 Chemical sciences |
description |
Light-absorbing impurities (LAIs) deposited in snow have the potential to substantially affect the snow radiation budget, with subsequent implications for snow melt. To more accurately quantify the snow albedo, the contribution from different LAIs needs to be assessed. Here we estimate the main LAI components, elemental carbon (EC) (as a proxy for black carbon) and mineral dust in snow from the Indian Himalayas and paired the results with snow samples from Arctic Finland. The impurities are collected onto quartz filters and are analyzed thermal-optically for EC, as well as with an additional optical measurement to estimate the light-absorption of dust separately on the filters. Laboratory tests were conducted using substrates containing soot and mineral particles, especially prepared to test the experimental setup. Analyzed ambient snow samples show EC concentrations that are in the same range as presented by previous research, for each respective region. In terms of the mass absorption cross section (MAC) our ambient EC surprisingly had about half of the MAC value compared to our laboratory standard EC (chimney soot), suggesting a less light absorptive EC in the snow, which has consequences for the snow albedo reduction caused by EC. In the Himalayan samples, larger contributions by dust (in the range of 50% or greater for the light absorption caused by the LAI) highlighted the importance of dust acting as a light absorber in the snow. Moreover, EC concentrations in the Indian samples, acquired from a 120 cm deep snow pit (possibly covering the last five years of snow fall), suggest an increase in both EC and dust deposition. This work emphasizes the complexity in determining the snow albedo, showing that LAI concentrations alone might not be sufficient, but additional transient effects on the light-absorbing properties of the EC need to be considered and studied in the snow. Equally as imperative is the confirmation of the spatial and temporal representativeness of these data by comparing data from several and ... |
author2 |
Department of Physics Ecosystems and Environment Research Programme Environmental Change Research Unit (ECRU) Institute for Atmospheric and Earth System Research (INAR) Helsinki Institute of Sustainability Science (HELSUS) |
format |
Article in Journal/Newspaper |
author |
Svensson, Jonas Strom, Johan Kivekas, Niku Dkhar, Nathaniel B. Tayal, Shresth Sharma, Ved P. Jutila, Arttu Backman, John Virkkula, Aki Ruppel, Meri Hyvarinen, Antti Kontu, Anna Hannula, Henna-Reetta Lepparanta, Matti Hooda, Rakesh K. Korhola, Atte Asmi, Eija Lihavainen, Heikki |
author_facet |
Svensson, Jonas Strom, Johan Kivekas, Niku Dkhar, Nathaniel B. Tayal, Shresth Sharma, Ved P. Jutila, Arttu Backman, John Virkkula, Aki Ruppel, Meri Hyvarinen, Antti Kontu, Anna Hannula, Henna-Reetta Lepparanta, Matti Hooda, Rakesh K. Korhola, Atte Asmi, Eija Lihavainen, Heikki |
author_sort |
Svensson, Jonas |
title |
Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic |
title_short |
Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic |
title_full |
Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic |
title_fullStr |
Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic |
title_full_unstemmed |
Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic |
title_sort |
light-absorption of dust and elemental carbon in snow in the indian himalayas and the finnish arctic |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2018 |
url |
http://hdl.handle.net/10138/233906 |
geographic |
Arctic Indian |
geographic_facet |
Arctic Indian |
genre |
albedo Arctic Arctic black carbon ice core |
genre_facet |
albedo Arctic Arctic black carbon ice core |
op_relation |
10.5194/amt-11-1403-2018 This work has been supported by the Academy of Finland projects: "Absorbing Aerosols and Fate of Indian Glaciers" (AAFIG; project number 268004), "Greenhouse gas, aerosol and albedo variations in the changing Arctic" (project number 269095), and "Novel Assessment of Black Carbon in the Eurasian Arctic: From Historical Concentrations and Sources to Future Climate Impacts" (NABCEA (project number 296302). The Academy of Finland Center of Excellence program (project number 272041), as well as the Nordic research and innovation initiative "Cryosphere-Atmosphere Interactions in a Changing Arctic Climate" have also supported this work. Jonas Svensson is thankful for the support from Svenska Kulturfonden. We would like to thank the providers of the soot Consti Taloteknikka, and Goran Liden at SU Luftlab for the mineral samples. The ACES department at Stockholm University, is part of the Bolin Centre for Climate Research. Finally we would like to thank the participants of the AAFIG 2015 expedition, including Sherpas and guides from Real Adventure, for their work during the expedition. Svensson , J , Strom , J , Kivekas , N , Dkhar , N B , Tayal , S , Sharma , V P , Jutila , A , Backman , J , Virkkula , A , Ruppel , M , Hyvarinen , A , Kontu , A , Hannula , H-R , Lepparanta , M , Hooda , R K , Korhola , A , Asmi , E & Lihavainen , H 2018 , ' Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic ' , Atmospheric Measurement Techniques , vol. 11 , no. 3 , pp. 1403-1416 . https://doi.org/10.5194/amt-11-1403-2018 ORCID: /0000-0001-6115-1687/work/43229505 85043582729 18bd8715-1676-4e7a-aac4-53f125247fce http://hdl.handle.net/10138/233906 000427269900001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Atmospheric Measurement Techniques |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1403 |
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1416 |
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1787429226271473664 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/233906 2024-01-07T09:38:03+01:00 Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic Svensson, Jonas Strom, Johan Kivekas, Niku Dkhar, Nathaniel B. Tayal, Shresth Sharma, Ved P. Jutila, Arttu Backman, John Virkkula, Aki Ruppel, Meri Hyvarinen, Antti Kontu, Anna Hannula, Henna-Reetta Lepparanta, Matti Hooda, Rakesh K. Korhola, Atte Asmi, Eija Lihavainen, Heikki Department of Physics Ecosystems and Environment Research Programme Environmental Change Research Unit (ECRU) Institute for Atmospheric and Earth System Research (INAR) Helsinki Institute of Sustainability Science (HELSUS) 2018-04-03T11:42:02Z 14 application/pdf http://hdl.handle.net/10138/233906 eng eng COPERNICUS GESELLSCHAFT MBH 10.5194/amt-11-1403-2018 This work has been supported by the Academy of Finland projects: "Absorbing Aerosols and Fate of Indian Glaciers" (AAFIG; project number 268004), "Greenhouse gas, aerosol and albedo variations in the changing Arctic" (project number 269095), and "Novel Assessment of Black Carbon in the Eurasian Arctic: From Historical Concentrations and Sources to Future Climate Impacts" (NABCEA (project number 296302). The Academy of Finland Center of Excellence program (project number 272041), as well as the Nordic research and innovation initiative "Cryosphere-Atmosphere Interactions in a Changing Arctic Climate" have also supported this work. Jonas Svensson is thankful for the support from Svenska Kulturfonden. We would like to thank the providers of the soot Consti Taloteknikka, and Goran Liden at SU Luftlab for the mineral samples. The ACES department at Stockholm University, is part of the Bolin Centre for Climate Research. Finally we would like to thank the participants of the AAFIG 2015 expedition, including Sherpas and guides from Real Adventure, for their work during the expedition. Svensson , J , Strom , J , Kivekas , N , Dkhar , N B , Tayal , S , Sharma , V P , Jutila , A , Backman , J , Virkkula , A , Ruppel , M , Hyvarinen , A , Kontu , A , Hannula , H-R , Lepparanta , M , Hooda , R K , Korhola , A , Asmi , E & Lihavainen , H 2018 , ' Light-absorption of dust and elemental carbon in snow in the Indian Himalayas and the Finnish Arctic ' , Atmospheric Measurement Techniques , vol. 11 , no. 3 , pp. 1403-1416 . https://doi.org/10.5194/amt-11-1403-2018 ORCID: /0000-0001-6115-1687/work/43229505 85043582729 18bd8715-1676-4e7a-aac4-53f125247fce http://hdl.handle.net/10138/233906 000427269900001 cc_by openAccess info:eu-repo/semantics/openAccess BLACK CARBON ABSORBING IMPURITIES ICE CORE THERMAL/OPTICAL ANALYSIS ATMOSPHERIC AEROSOLS TIBETAN PLATEAU SPECTRAL ALBEDO NORTHERN INDIA MIXING STATE PARTICLES 1172 Environmental sciences 116 Chemical sciences Article publishedVersion 2018 ftunivhelsihelda 2023-12-14T00:05:50Z Light-absorbing impurities (LAIs) deposited in snow have the potential to substantially affect the snow radiation budget, with subsequent implications for snow melt. To more accurately quantify the snow albedo, the contribution from different LAIs needs to be assessed. Here we estimate the main LAI components, elemental carbon (EC) (as a proxy for black carbon) and mineral dust in snow from the Indian Himalayas and paired the results with snow samples from Arctic Finland. The impurities are collected onto quartz filters and are analyzed thermal-optically for EC, as well as with an additional optical measurement to estimate the light-absorption of dust separately on the filters. Laboratory tests were conducted using substrates containing soot and mineral particles, especially prepared to test the experimental setup. Analyzed ambient snow samples show EC concentrations that are in the same range as presented by previous research, for each respective region. In terms of the mass absorption cross section (MAC) our ambient EC surprisingly had about half of the MAC value compared to our laboratory standard EC (chimney soot), suggesting a less light absorptive EC in the snow, which has consequences for the snow albedo reduction caused by EC. In the Himalayan samples, larger contributions by dust (in the range of 50% or greater for the light absorption caused by the LAI) highlighted the importance of dust acting as a light absorber in the snow. Moreover, EC concentrations in the Indian samples, acquired from a 120 cm deep snow pit (possibly covering the last five years of snow fall), suggest an increase in both EC and dust deposition. This work emphasizes the complexity in determining the snow albedo, showing that LAI concentrations alone might not be sufficient, but additional transient effects on the light-absorbing properties of the EC need to be considered and studied in the snow. Equally as imperative is the confirmation of the spatial and temporal representativeness of these data by comparing data from several and ... Article in Journal/Newspaper albedo Arctic Arctic black carbon ice core HELDA – University of Helsinki Open Repository Arctic Indian Atmospheric Measurement Techniques 11 3 1403 1416 |