Light-absorbing capacity of volcanic dust from Iceland and Chile
It is increasingly recognized that light-absorbing impurities (LAI) deposited on snow and ice affect their albedo and facilitate melting processes leading to various feedback loops, such as the ice albedo feedback mechanism. Black carbon (BC) is often considered the most important LAI, but some area...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/579222 2024-09-15T17:35:47+00:00 Light-absorbing capacity of volcanic dust from Iceland and Chile Koivusalo, Taru F. A. Dagsson-Waldhauserová, Pavla Gritsevich, Maria Peltoniemi, Jouni Maanmittauslaitos National Land Survey of Finland orcid:0000-0002-4701-128X 2024-07-29T07:46:05Z application/pdf http://hdl.handle.net/10138/579222 en eng Frontiers Media SA Frontiers in Earth Science 10.3389/feart.2024.1348082 2296-6463 12 104717 http://hdl.handle.net/10138/579222 URN:NBN:fi-fe2024072962858 CC BY 4.0 light-absorbing impurities dust volcanic sand albedo snow climate change cryosphere optical properties A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä A1 Journal article (refereed), original research publishedVersion 2024 ftunivhelsihelda 2024-07-31T23:42:50Z It is increasingly recognized that light-absorbing impurities (LAI) deposited on snow and ice affect their albedo and facilitate melting processes leading to various feedback loops, such as the ice albedo feedback mechanism. Black carbon (BC) is often considered the most important LAI, but some areas can be more impacted by high dust emissions. Iceland is one of the most important high latitude sources for the Arctic due to high emissions and the volcanic nature of the dust. We studied optical properties of volcanic dust from Iceland and Chile to understand how it interacts with the Sun’s radiation and affects areas of deposition as LAI. Optical properties of dust samples were measured at the laboratory of the Finnish Geospatial Research Institute (FGI) using the latest setup of the FGI’s goniospectrometer. We found that, depending on the particle size, the albedo of dry volcanic dust on the visible spectrum is as low as 0.03, similar to that of BC, and the albedo decreases with increasing particle size. Wet dust reduces its albedo by 66% compared to dry sample. This supports the comparability of their albedo reducing effects to BC as LAIs, and highlights their significant role in albedo reduction of snow and ice areas. The potential use of the results from our measurements is diverse, including their use as a ground truth reference for Earth Observation and remote sensing studies, estimating climate change over time, as well as measuring other ecological effects caused by changes in atmospheric composition or land cover. Article in Journal/Newspaper albedo black carbon Climate change Iceland HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
light-absorbing impurities dust volcanic sand albedo snow climate change cryosphere optical properties |
spellingShingle |
light-absorbing impurities dust volcanic sand albedo snow climate change cryosphere optical properties Koivusalo, Taru F. A. Dagsson-Waldhauserová, Pavla Gritsevich, Maria Peltoniemi, Jouni Light-absorbing capacity of volcanic dust from Iceland and Chile |
topic_facet |
light-absorbing impurities dust volcanic sand albedo snow climate change cryosphere optical properties |
description |
It is increasingly recognized that light-absorbing impurities (LAI) deposited on snow and ice affect their albedo and facilitate melting processes leading to various feedback loops, such as the ice albedo feedback mechanism. Black carbon (BC) is often considered the most important LAI, but some areas can be more impacted by high dust emissions. Iceland is one of the most important high latitude sources for the Arctic due to high emissions and the volcanic nature of the dust. We studied optical properties of volcanic dust from Iceland and Chile to understand how it interacts with the Sun’s radiation and affects areas of deposition as LAI. Optical properties of dust samples were measured at the laboratory of the Finnish Geospatial Research Institute (FGI) using the latest setup of the FGI’s goniospectrometer. We found that, depending on the particle size, the albedo of dry volcanic dust on the visible spectrum is as low as 0.03, similar to that of BC, and the albedo decreases with increasing particle size. Wet dust reduces its albedo by 66% compared to dry sample. This supports the comparability of their albedo reducing effects to BC as LAIs, and highlights their significant role in albedo reduction of snow and ice areas. The potential use of the results from our measurements is diverse, including their use as a ground truth reference for Earth Observation and remote sensing studies, estimating climate change over time, as well as measuring other ecological effects caused by changes in atmospheric composition or land cover. |
author2 |
Maanmittauslaitos National Land Survey of Finland orcid:0000-0002-4701-128X |
format |
Article in Journal/Newspaper |
author |
Koivusalo, Taru F. A. Dagsson-Waldhauserová, Pavla Gritsevich, Maria Peltoniemi, Jouni |
author_facet |
Koivusalo, Taru F. A. Dagsson-Waldhauserová, Pavla Gritsevich, Maria Peltoniemi, Jouni |
author_sort |
Koivusalo, Taru F. A. |
title |
Light-absorbing capacity of volcanic dust from Iceland and Chile |
title_short |
Light-absorbing capacity of volcanic dust from Iceland and Chile |
title_full |
Light-absorbing capacity of volcanic dust from Iceland and Chile |
title_fullStr |
Light-absorbing capacity of volcanic dust from Iceland and Chile |
title_full_unstemmed |
Light-absorbing capacity of volcanic dust from Iceland and Chile |
title_sort |
light-absorbing capacity of volcanic dust from iceland and chile |
publisher |
Frontiers Media SA |
publishDate |
2024 |
url |
http://hdl.handle.net/10138/579222 |
genre |
albedo black carbon Climate change Iceland |
genre_facet |
albedo black carbon Climate change Iceland |
op_relation |
Frontiers in Earth Science 10.3389/feart.2024.1348082 2296-6463 12 104717 http://hdl.handle.net/10138/579222 URN:NBN:fi-fe2024072962858 |
op_rights |
CC BY 4.0 |
_version_ |
1810479308808912896 |