Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends
We evaluate Greenland Ice Sheet (GrIS) surface reflectance and albedo trends using the newly released Collection 6 (C6) MODIS (Moderate Resolution Imaging Spectroradiometer) products over the period 2001–2016. We find that the correction of MODIS sensor degradation provided in the new C6 data produc...
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ftdoajarticles:oai:doaj.org/article:cb940091aefd443fb44c213765ad02ca 2023-05-15T16:27:11+02:00 Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends K. A. Casey C. M. Polashenski J. Chen M. Tedesco 2017-08-01T00:00:00Z https://doi.org/10.5194/tc-11-1781-2017 https://doaj.org/article/cb940091aefd443fb44c213765ad02ca EN eng Copernicus Publications https://www.the-cryosphere.net/11/1781/2017/tc-11-1781-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-1781-2017 1994-0416 1994-0424 https://doaj.org/article/cb940091aefd443fb44c213765ad02ca The Cryosphere, Vol 11, Pp 1781-1795 (2017) Environmental sciences GE1-350 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/tc-11-1781-2017 2022-12-31T14:42:29Z We evaluate Greenland Ice Sheet (GrIS) surface reflectance and albedo trends using the newly released Collection 6 (C6) MODIS (Moderate Resolution Imaging Spectroradiometer) products over the period 2001–2016. We find that the correction of MODIS sensor degradation provided in the new C6 data products reduces the magnitude of the surface reflectance and albedo decline trends obtained from previous MODIS data (i.e., Collection 5, C5). Collection 5 and 6 data product analysis over GrIS is characterized by surface (i.e., wet vs. dry) and elevation (i.e., 500–2000 m, 2000 m and greater) conditions over the summer season from 1 June to 31 August. Notably, the visible-wavelength declining reflectance trends identified in several bands of MODIS C5 data from previous studies are only slightly detected at reduced magnitude in the C6 versions over the dry snow area. Declining albedo in the wet snow and ice area remains over the MODIS record in the C6 product, albeit at a lower magnitude than obtained using C5 data. Further analyses of C6 spectral reflectance trends show both reflectance increases and decreases in select bands and regions, suggesting that several competing processes are contributing to Greenland Ice Sheet albedo change. Investigators using MODIS data for other ocean, atmosphere and/or land analyses are urged to consider similar re-examinations of trends previously established using C5 data. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 11 4 1781 1795 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 K. A. Casey C. M. Polashenski J. Chen M. Tedesco Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
We evaluate Greenland Ice Sheet (GrIS) surface reflectance and albedo trends using the newly released Collection 6 (C6) MODIS (Moderate Resolution Imaging Spectroradiometer) products over the period 2001–2016. We find that the correction of MODIS sensor degradation provided in the new C6 data products reduces the magnitude of the surface reflectance and albedo decline trends obtained from previous MODIS data (i.e., Collection 5, C5). Collection 5 and 6 data product analysis over GrIS is characterized by surface (i.e., wet vs. dry) and elevation (i.e., 500–2000 m, 2000 m and greater) conditions over the summer season from 1 June to 31 August. Notably, the visible-wavelength declining reflectance trends identified in several bands of MODIS C5 data from previous studies are only slightly detected at reduced magnitude in the C6 versions over the dry snow area. Declining albedo in the wet snow and ice area remains over the MODIS record in the C6 product, albeit at a lower magnitude than obtained using C5 data. Further analyses of C6 spectral reflectance trends show both reflectance increases and decreases in select bands and regions, suggesting that several competing processes are contributing to Greenland Ice Sheet albedo change. Investigators using MODIS data for other ocean, atmosphere and/or land analyses are urged to consider similar re-examinations of trends previously established using C5 data. |
format |
Article in Journal/Newspaper |
author |
K. A. Casey C. M. Polashenski J. Chen M. Tedesco |
author_facet |
K. A. Casey C. M. Polashenski J. Chen M. Tedesco |
author_sort |
K. A. Casey |
title |
Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends |
title_short |
Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends |
title_full |
Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends |
title_fullStr |
Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends |
title_full_unstemmed |
Impact of MODIS sensor calibration updates on Greenland Ice Sheet surface reflectance and albedo trends |
title_sort |
impact of modis sensor calibration updates on greenland ice sheet surface reflectance and albedo trends |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-1781-2017 https://doaj.org/article/cb940091aefd443fb44c213765ad02ca |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 11, Pp 1781-1795 (2017) |
op_relation |
https://www.the-cryosphere.net/11/1781/2017/tc-11-1781-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-1781-2017 1994-0416 1994-0424 https://doaj.org/article/cb940091aefd443fb44c213765ad02ca |
op_doi |
https://doi.org/10.5194/tc-11-1781-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
4 |
container_start_page |
1781 |
op_container_end_page |
1795 |
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