Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes
Accurate multidecadal radiative flux records are vital to understand Arctic amplification and constrain climate model uncertainties. Uncertainty in the NASA Clouds and the Earth’s Radiant Energy System (CERES)-derived irradiances is larger over sea ice than any other surface type and comes from seve...
Published in: | Elementa: Science of the Anthropocene |
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Online Access: | http://www.osti.gov/servlets/purl/1874207 https://www.osti.gov/biblio/1874207 https://doi.org/10.1525/elementa.2022.00013 |
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ftosti:oai:osti.gov:1874207 2023-07-30T03:55:38+02:00 Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes Huang, Yiyi Taylor, Patrick C. Rose, Fred G. Rutan, David A. Shupe, Matthew D. Webster, Melinda A. Smith, Madison M. 2023-02-23 application/pdf http://www.osti.gov/servlets/purl/1874207 https://www.osti.gov/biblio/1874207 https://doi.org/10.1525/elementa.2022.00013 unknown http://www.osti.gov/servlets/purl/1874207 https://www.osti.gov/biblio/1874207 https://doi.org/10.1525/elementa.2022.00013 doi:10.1525/elementa.2022.00013 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.1525/elementa.2022.00013 2023-07-11T10:13:14Z Accurate multidecadal radiative flux records are vital to understand Arctic amplification and constrain climate model uncertainties. Uncertainty in the NASA Clouds and the Earth’s Radiant Energy System (CERES)-derived irradiances is larger over sea ice than any other surface type and comes from several sources. The year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the central Arctic provides a rare opportunity to explore uncertainty in CERES-derived radiative fluxes. First, a systematic and statistically robust assessment of surface shortwave and longwave fluxes was conducted using in situ measurements from MOSAiC flux stations. The CERES Synoptic 1degree (SYN1deg) product overestimates the downwelling shortwave flux by +11.40 Wm –2 and underestimates the upwelling shortwave flux by –15.70 Wm –2 and downwelling longwave fluxes by –12.58 Wm –2 at the surface during summer. In addition, large differences are found in the upwelling longwave flux when the surface approaches the melting point (approximately 0°C). The biases in downwelling shortwave and longwave fluxes suggest that the atmosphere represented in CERES is too optically thin. The large negative bias in upwelling shortwave flux can be attributed in large part to lower surface albedo (–0.15) in satellite footprint relative to surface sensors. Additionally, the results show that the spectral surface albedo used in SYN1deg overestimates albedo in visible and mid-infrared bands. A series of radiative transfer model perturbation experiments are performed to quantify the factors contributing to the differences. The CERES-MOSAiC broadband albedo differences (approximately 20 Wm –2 ) explain a larger portion of the upwelling shortwave flux difference than the spectral albedo shape differences (approximately 3 Wm –2 ). In addition, the differences between perturbation experiments using hourly and monthly MOSAiC surface albedo suggest that approximately 25% of the sea ice surface albedo variability is explained ... Other/Unknown Material albedo Arctic Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Elementa: Science of the Anthropocene 10 1 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Huang, Yiyi Taylor, Patrick C. Rose, Fred G. Rutan, David A. Shupe, Matthew D. Webster, Melinda A. Smith, Madison M. Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Accurate multidecadal radiative flux records are vital to understand Arctic amplification and constrain climate model uncertainties. Uncertainty in the NASA Clouds and the Earth’s Radiant Energy System (CERES)-derived irradiances is larger over sea ice than any other surface type and comes from several sources. The year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the central Arctic provides a rare opportunity to explore uncertainty in CERES-derived radiative fluxes. First, a systematic and statistically robust assessment of surface shortwave and longwave fluxes was conducted using in situ measurements from MOSAiC flux stations. The CERES Synoptic 1degree (SYN1deg) product overestimates the downwelling shortwave flux by +11.40 Wm –2 and underestimates the upwelling shortwave flux by –15.70 Wm –2 and downwelling longwave fluxes by –12.58 Wm –2 at the surface during summer. In addition, large differences are found in the upwelling longwave flux when the surface approaches the melting point (approximately 0°C). The biases in downwelling shortwave and longwave fluxes suggest that the atmosphere represented in CERES is too optically thin. The large negative bias in upwelling shortwave flux can be attributed in large part to lower surface albedo (–0.15) in satellite footprint relative to surface sensors. Additionally, the results show that the spectral surface albedo used in SYN1deg overestimates albedo in visible and mid-infrared bands. A series of radiative transfer model perturbation experiments are performed to quantify the factors contributing to the differences. The CERES-MOSAiC broadband albedo differences (approximately 20 Wm –2 ) explain a larger portion of the upwelling shortwave flux difference than the spectral albedo shape differences (approximately 3 Wm –2 ). In addition, the differences between perturbation experiments using hourly and monthly MOSAiC surface albedo suggest that approximately 25% of the sea ice surface albedo variability is explained ... |
author |
Huang, Yiyi Taylor, Patrick C. Rose, Fred G. Rutan, David A. Shupe, Matthew D. Webster, Melinda A. Smith, Madison M. |
author_facet |
Huang, Yiyi Taylor, Patrick C. Rose, Fred G. Rutan, David A. Shupe, Matthew D. Webster, Melinda A. Smith, Madison M. |
author_sort |
Huang, Yiyi |
title |
Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes |
title_short |
Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes |
title_full |
Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes |
title_fullStr |
Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes |
title_full_unstemmed |
Toward a more realistic representation of surface albedo in NASA CERES-derived surface radiative fluxes |
title_sort |
toward a more realistic representation of surface albedo in nasa ceres-derived surface radiative fluxes |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1874207 https://www.osti.gov/biblio/1874207 https://doi.org/10.1525/elementa.2022.00013 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Sea ice |
genre_facet |
albedo Arctic Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/1874207 https://www.osti.gov/biblio/1874207 https://doi.org/10.1525/elementa.2022.00013 doi:10.1525/elementa.2022.00013 |
op_doi |
https://doi.org/10.1525/elementa.2022.00013 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
10 |
container_issue |
1 |
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1772821042379620352 |