Scavenging ratio of black carbon in the Arctic and the Antarctic
Long-term monitoring of atmospheric aerosols and their interaction with radiation, cloud, and cryosphere over the Arctic and the Antarctic are very important for the global climate change related issues. In this regard, for conducting aerosol measurements, India has extended the concerted efforts to...
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ftindianacasci:oai:repository.ias.ac.in:125166 2023-05-15T13:10:40+02:00 Scavenging ratio of black carbon in the Arctic and the Antarctic Gogoi, Mukunda M. Babu, S. Suresh Pandey, Santosh K. Nair, Vijayakumar S. Vaishya, Aditya Girach, I.A. Koushik, N. 2018 http://repository.ias.ac.in/125166/ https://doi.org/10.1016/j.polar.2018.03.002 unknown Elsevier Science Gogoi, Mukunda M. Babu, S. Suresh Pandey, Santosh K. Nair, Vijayakumar S. Vaishya, Aditya Girach, I.A. Koushik, N. (2018) Scavenging ratio of black carbon in the Arctic and the Antarctic Polar Science, 16 . pp. 10-22. ISSN 1873-9652 QE Geology Article PeerReviewed 2018 ftindianacasci https://doi.org/10.1016/j.polar.2018.03.002 2022-01-17T10:21:10Z Long-term monitoring of atmospheric aerosols and their interaction with radiation, cloud, and cryosphere over the Arctic and the Antarctic are very important for the global climate change related issues. In this regard, for conducting aerosol measurements, India has extended the concerted efforts to the Svalbard region of the Norwegian Arctic (Himadri, 78°55′N 11°56′E, 8 m a.s.l.) in the northern hemisphere and the Larsemann Hills of coastal Antarctic (Bharati, 69°24.4′S 76°11.7′E, 40 m a.s.l.) in the southern hemisphere. In the present study, we have examined the role of black carbon (BC) deposition in darkening the polar snow in different sunlit seasons and estimated the scavenging ratio of BC over both the poles from simultaneous measurements of atmospheric and snow deposited BC concentrations. The study reveals distinct spatio-temporal variability of BC in polar snow, even though the concentrations are, in general, low (<12 ppbw, parts per billion by weight). During local summer seasons, the BC in snow at the Arctic (median ∼ 7.98 ppbw) was higher than that at the Antarctica (median ∼ 1.70 ppbw). Concurrent with this, the scavenging ratio (SR) also showed large variability over both the poles. Relatively higher values of SR over the Antarctica (mean ∼ 119.54 ± 23.04; during southern hemispheric summer) in comparison to that over the Arctic (mean ∼ 69.48 ± 4.79; during northern hemispheric spring) clearly indicate the difference in removal mechanisms (aerosol mixing, aging and size distribution) of BC from the atmosphere over distinct polar environments. Measurement of spectral incoming and reflected radiances over the Arctic snow during the early spring season of 2017 indicated the values of surface broadband albedo varying between 0.64 and 0.79. The Snow, Ice and Aerosol Radiative (SNICAR) model simulated values of spectral albedo correlated well with the measured ones and indicated the role of dust absorption, in addition to that of BC, in changing the snow albedo. This information needs to be accurately incorporated in the radiative transfer models for the accurate estimation of snow albedo forcing over the Polar Regions. Article in Journal/Newspaper albedo Antarc* Antarctic Antarctica Arctic Arctic black carbon Climate change Polar Science Polar Science Svalbard Indian Academy of Sciences: Publication of Fellows Antarctic Arctic Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Svalbard The Antarctic Polar Science 16 10 22 |
institution |
Open Polar |
collection |
Indian Academy of Sciences: Publication of Fellows |
op_collection_id |
ftindianacasci |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Gogoi, Mukunda M. Babu, S. Suresh Pandey, Santosh K. Nair, Vijayakumar S. Vaishya, Aditya Girach, I.A. Koushik, N. Scavenging ratio of black carbon in the Arctic and the Antarctic |
topic_facet |
QE Geology |
description |
Long-term monitoring of atmospheric aerosols and their interaction with radiation, cloud, and cryosphere over the Arctic and the Antarctic are very important for the global climate change related issues. In this regard, for conducting aerosol measurements, India has extended the concerted efforts to the Svalbard region of the Norwegian Arctic (Himadri, 78°55′N 11°56′E, 8 m a.s.l.) in the northern hemisphere and the Larsemann Hills of coastal Antarctic (Bharati, 69°24.4′S 76°11.7′E, 40 m a.s.l.) in the southern hemisphere. In the present study, we have examined the role of black carbon (BC) deposition in darkening the polar snow in different sunlit seasons and estimated the scavenging ratio of BC over both the poles from simultaneous measurements of atmospheric and snow deposited BC concentrations. The study reveals distinct spatio-temporal variability of BC in polar snow, even though the concentrations are, in general, low (<12 ppbw, parts per billion by weight). During local summer seasons, the BC in snow at the Arctic (median ∼ 7.98 ppbw) was higher than that at the Antarctica (median ∼ 1.70 ppbw). Concurrent with this, the scavenging ratio (SR) also showed large variability over both the poles. Relatively higher values of SR over the Antarctica (mean ∼ 119.54 ± 23.04; during southern hemispheric summer) in comparison to that over the Arctic (mean ∼ 69.48 ± 4.79; during northern hemispheric spring) clearly indicate the difference in removal mechanisms (aerosol mixing, aging and size distribution) of BC from the atmosphere over distinct polar environments. Measurement of spectral incoming and reflected radiances over the Arctic snow during the early spring season of 2017 indicated the values of surface broadband albedo varying between 0.64 and 0.79. The Snow, Ice and Aerosol Radiative (SNICAR) model simulated values of spectral albedo correlated well with the measured ones and indicated the role of dust absorption, in addition to that of BC, in changing the snow albedo. This information needs to be accurately incorporated in the radiative transfer models for the accurate estimation of snow albedo forcing over the Polar Regions. |
format |
Article in Journal/Newspaper |
author |
Gogoi, Mukunda M. Babu, S. Suresh Pandey, Santosh K. Nair, Vijayakumar S. Vaishya, Aditya Girach, I.A. Koushik, N. |
author_facet |
Gogoi, Mukunda M. Babu, S. Suresh Pandey, Santosh K. Nair, Vijayakumar S. Vaishya, Aditya Girach, I.A. Koushik, N. |
author_sort |
Gogoi, Mukunda M. |
title |
Scavenging ratio of black carbon in the Arctic and the Antarctic |
title_short |
Scavenging ratio of black carbon in the Arctic and the Antarctic |
title_full |
Scavenging ratio of black carbon in the Arctic and the Antarctic |
title_fullStr |
Scavenging ratio of black carbon in the Arctic and the Antarctic |
title_full_unstemmed |
Scavenging ratio of black carbon in the Arctic and the Antarctic |
title_sort |
scavenging ratio of black carbon in the arctic and the antarctic |
publisher |
Elsevier Science |
publishDate |
2018 |
url |
http://repository.ias.ac.in/125166/ https://doi.org/10.1016/j.polar.2018.03.002 |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) |
geographic |
Antarctic Arctic Larsemann Hills Svalbard The Antarctic |
geographic_facet |
Antarctic Arctic Larsemann Hills Svalbard The Antarctic |
genre |
albedo Antarc* Antarctic Antarctica Arctic Arctic black carbon Climate change Polar Science Polar Science Svalbard |
genre_facet |
albedo Antarc* Antarctic Antarctica Arctic Arctic black carbon Climate change Polar Science Polar Science Svalbard |
op_relation |
Gogoi, Mukunda M. Babu, S. Suresh Pandey, Santosh K. Nair, Vijayakumar S. Vaishya, Aditya Girach, I.A. Koushik, N. (2018) Scavenging ratio of black carbon in the Arctic and the Antarctic Polar Science, 16 . pp. 10-22. ISSN 1873-9652 |
op_doi |
https://doi.org/10.1016/j.polar.2018.03.002 |
container_title |
Polar Science |
container_volume |
16 |
container_start_page |
10 |
op_container_end_page |
22 |
_version_ |
1766238503683751936 |