Partitioning of solar radiation in Arctic sea ice during melt season
Summary The partitioning of solar radiation in the Arctic sea ice during the melt season is investigated using a radiative transfer model containing three layers of melt pond, underlying sea ice, and ocean beneath ice. The wavelength distribution of the spectral solar irradiance clearly narrowed wit...
Published in: | Oceanologia |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Polish Academy of Sciences
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/10138/239802 |
id |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/239802 |
---|---|
record_format |
openpolar |
spelling |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/239802 2024-01-07T09:38:03+01:00 Partitioning of solar radiation in Arctic sea ice during melt season Lu, Peng Cheng, Bin Leppäranta, Matti Li, Zhijun Institute for Atmospheric and Earth System Research (INAR) 2018-08-28T12:34:01Z 14 application/pdf http://hdl.handle.net/10138/239802 eng eng Polish Academy of Sciences 10.1016/j.oceano.2018.03.002 Lu , P , Cheng , B , Leppäranta , M & Li , Z 2018 , ' Partitioning of solar radiation in Arctic sea ice during melt season ' , Oceanologia , vol. 60 , no. 4 , pp. 464-477 . https://doi.org/10.1016/j.oceano.2018.03.002 RIS: urn:78CF07435A0E5025A0E8AEA54AF29889 85045550583 547d9ce7-0b9c-479f-9f22-185bea1d5301 http://hdl.handle.net/10138/239802 000442950700003 cc_by_nc_nd openAccess info:eu-repo/semantics/openAccess Arctic sea ice Melt pond Radiation transfer Mass balance Numerical modelling ALBEDO ENERGY OCEAN OPTICAL-PROPERTIES LIGHT TRANSMISSION PHYSICAL STRUCTURES PONDS WATER BODIES SUMMER DEPTH 1171 Geosciences 114 Physical sciences Article publishedVersion 2018 ftunivhelsihelda 2023-12-14T00:09:41Z Summary The partitioning of solar radiation in the Arctic sea ice during the melt season is investigated using a radiative transfer model containing three layers of melt pond, underlying sea ice, and ocean beneath ice. The wavelength distribution of the spectral solar irradiance clearly narrowed with increasing depth into ice, from 350–900 nm at the pond surface to 400–600 nm in the ocean beneath. In contrast, the net spectral irradiance is quite uniform. The absorbed solar energy is sensitive to both pond depth (Hp) and the underlying ice thickness (Hi). The solar energy absorbed by the melt pond (Ψp) is proportional only to Hp. However, the solar energy absorbed by the underlying ice (Ψi) is more complicated due to the counteracting effects arising from the pond and ice to the energy absorption. In September, Ψp decreased by 10% from its August value, which is attributed to more components in the shortwave band (<530 nm) of the incident solar radiation in September relative to August. The absorption coefficient of the sea ice only enhances the absorbed energy in ice, while an increase in the ice scattering coefficient only enhances the absorbed energy in the melt pond, although the resulted changes in Ψp and Ψi are smaller than that in the albedo and transmittance. The energy absorption rate with depth depends strongly on the incident irradiance and ice scattering, but only weakly on pond depth. Our results are comparable to previous field measurements and numerical simulations. We conclude that the incident solar energy was largely absorbed by the melt pond rather than by the underlying sea ice. Peer reviewed Article in Journal/Newspaper albedo Arctic Arctic Sea ice HELDA – University of Helsinki Open Repository Arctic Oceanologia 60 4 464 477 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Arctic sea ice Melt pond Radiation transfer Mass balance Numerical modelling ALBEDO ENERGY OCEAN OPTICAL-PROPERTIES LIGHT TRANSMISSION PHYSICAL STRUCTURES PONDS WATER BODIES SUMMER DEPTH 1171 Geosciences 114 Physical sciences |
spellingShingle |
Arctic sea ice Melt pond Radiation transfer Mass balance Numerical modelling ALBEDO ENERGY OCEAN OPTICAL-PROPERTIES LIGHT TRANSMISSION PHYSICAL STRUCTURES PONDS WATER BODIES SUMMER DEPTH 1171 Geosciences 114 Physical sciences Lu, Peng Cheng, Bin Leppäranta, Matti Li, Zhijun Partitioning of solar radiation in Arctic sea ice during melt season |
topic_facet |
Arctic sea ice Melt pond Radiation transfer Mass balance Numerical modelling ALBEDO ENERGY OCEAN OPTICAL-PROPERTIES LIGHT TRANSMISSION PHYSICAL STRUCTURES PONDS WATER BODIES SUMMER DEPTH 1171 Geosciences 114 Physical sciences |
description |
Summary The partitioning of solar radiation in the Arctic sea ice during the melt season is investigated using a radiative transfer model containing three layers of melt pond, underlying sea ice, and ocean beneath ice. The wavelength distribution of the spectral solar irradiance clearly narrowed with increasing depth into ice, from 350–900 nm at the pond surface to 400–600 nm in the ocean beneath. In contrast, the net spectral irradiance is quite uniform. The absorbed solar energy is sensitive to both pond depth (Hp) and the underlying ice thickness (Hi). The solar energy absorbed by the melt pond (Ψp) is proportional only to Hp. However, the solar energy absorbed by the underlying ice (Ψi) is more complicated due to the counteracting effects arising from the pond and ice to the energy absorption. In September, Ψp decreased by 10% from its August value, which is attributed to more components in the shortwave band (<530 nm) of the incident solar radiation in September relative to August. The absorption coefficient of the sea ice only enhances the absorbed energy in ice, while an increase in the ice scattering coefficient only enhances the absorbed energy in the melt pond, although the resulted changes in Ψp and Ψi are smaller than that in the albedo and transmittance. The energy absorption rate with depth depends strongly on the incident irradiance and ice scattering, but only weakly on pond depth. Our results are comparable to previous field measurements and numerical simulations. We conclude that the incident solar energy was largely absorbed by the melt pond rather than by the underlying sea ice. Peer reviewed |
author2 |
Institute for Atmospheric and Earth System Research (INAR) |
format |
Article in Journal/Newspaper |
author |
Lu, Peng Cheng, Bin Leppäranta, Matti Li, Zhijun |
author_facet |
Lu, Peng Cheng, Bin Leppäranta, Matti Li, Zhijun |
author_sort |
Lu, Peng |
title |
Partitioning of solar radiation in Arctic sea ice during melt season |
title_short |
Partitioning of solar radiation in Arctic sea ice during melt season |
title_full |
Partitioning of solar radiation in Arctic sea ice during melt season |
title_fullStr |
Partitioning of solar radiation in Arctic sea ice during melt season |
title_full_unstemmed |
Partitioning of solar radiation in Arctic sea ice during melt season |
title_sort |
partitioning of solar radiation in arctic sea ice during melt season |
publisher |
Polish Academy of Sciences |
publishDate |
2018 |
url |
http://hdl.handle.net/10138/239802 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Arctic Sea ice |
genre_facet |
albedo Arctic Arctic Sea ice |
op_relation |
10.1016/j.oceano.2018.03.002 Lu , P , Cheng , B , Leppäranta , M & Li , Z 2018 , ' Partitioning of solar radiation in Arctic sea ice during melt season ' , Oceanologia , vol. 60 , no. 4 , pp. 464-477 . https://doi.org/10.1016/j.oceano.2018.03.002 RIS: urn:78CF07435A0E5025A0E8AEA54AF29889 85045550583 547d9ce7-0b9c-479f-9f22-185bea1d5301 http://hdl.handle.net/10138/239802 000442950700003 |
op_rights |
cc_by_nc_nd openAccess info:eu-repo/semantics/openAccess |
container_title |
Oceanologia |
container_volume |
60 |
container_issue |
4 |
container_start_page |
464 |
op_container_end_page |
477 |
_version_ |
1787429363182993408 |