Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar
Reducing carbon emissions from deforestation and degradation (REDD) requires detailed insight into how the forest biomass is measured and distributed. Studies so far have estimated forest biomass stocks using rough assumptions and unreliable data. High-resolution data and robust methods are required to capture the spatial variability of forest biomass with sufficient precision. Here we aim to improve on previous approaches by using radar satellite ALOS PALSAR (25-m resolution) and optical Landsat-derived tree cover (30-m resolution) observations to estimate forest biomass stocks in Madagascar, for the years 2007–2010. The radar signal and in situ biomass were highly correlated (R2 = 0.71) and the root mean square error was 30% (for biomass ranging from 0 to 500 t/ha). Using our map at 25-m resolution for the entire island of Madagascar, we estimated the total above-ground forest carbon for the four years 2007, 2008, 2009 and 2010 to be 1.1173 ± 0.0304, 1.1029 ± 0.0303, 1.0916 ± 0.0301 and 1.0773 ± 0.0298 PgC, respectively. Carbon stocks were found to have decreased constantly over this period due to anthropogenic deforestation and likely also to climate change. The results are expected to serve as a more accurate benchmark for monitoring progress on REDD and to provide strong supports for current and future spaceborne missions such as ALOS-2, SAOCOM and BIOMASS.
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dig-cirad-fr-5879232021-11-09T09:50:46Z http://agritrop.cirad.fr/587923/ http://agritrop.cirad.fr/587923/ Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar. Ho Tong Minh Dinh, Ndikumana Emile, Vieilledent Ghislain, McKey Doyle B., Baghdadi Nicolas. 2018. Remote Sensing of Environment, 213 : 206-214.https://doi.org/10.1016/j.rse.2018.04.056 <https://doi.org/10.1016/j.rse.2018.04.056> Researchers Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar Ho Tong Minh, Dinh Ndikumana, Emile Vieilledent, Ghislain McKey, Doyle B. Baghdadi, Nicolas eng 2018 Remote Sensing of Environment K01 - Foresterie - Considérations générales U30 - Méthodes de recherche Madagascar http://aims.fao.org/aos/agrovoc/c_4510 Reducing carbon emissions from deforestation and degradation (REDD) requires detailed insight into how the forest biomass is measured and distributed. Studies so far have estimated forest biomass stocks using rough assumptions and unreliable data. High-resolution data and robust methods are required to capture the spatial variability of forest biomass with sufficient precision. Here we aim to improve on previous approaches by using radar satellite ALOS PALSAR (25-m resolution) and optical Landsat-derived tree cover (30-m resolution) observations to estimate forest biomass stocks in Madagascar, for the years 2007–2010. The radar signal and in situ biomass were highly correlated (R2 = 0.71) and the root mean square error was 30% (for biomass ranging from 0 to 500 t/ha). Using our map at 25-m resolution for the entire island of Madagascar, we estimated the total above-ground forest carbon for the four years 2007, 2008, 2009 and 2010 to be 1.1173 ± 0.0304, 1.1029 ± 0.0303, 1.0916 ± 0.0301 and 1.0773 ± 0.0298 PgC, respectively. Carbon stocks were found to have decreased constantly over this period due to anthropogenic deforestation and likely also to climate change. The results are expected to serve as a more accurate benchmark for monitoring progress on REDD and to provide strong supports for current and future spaceborne missions such as ALOS-2, SAOCOM and BIOMASS. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/587923/7/1-s2.0-S0034425718302104-main.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.rse.2018.04.056 10.1016/j.rse.2018.04.056 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rse.2018.04.056 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.rse.2018.04.056 |
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K01 - Foresterie - Considérations générales U30 - Méthodes de recherche http://aims.fao.org/aos/agrovoc/c_4510 K01 - Foresterie - Considérations générales U30 - Méthodes de recherche http://aims.fao.org/aos/agrovoc/c_4510 |
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K01 - Foresterie - Considérations générales U30 - Méthodes de recherche http://aims.fao.org/aos/agrovoc/c_4510 K01 - Foresterie - Considérations générales U30 - Méthodes de recherche http://aims.fao.org/aos/agrovoc/c_4510 Ho Tong Minh, Dinh Ndikumana, Emile Vieilledent, Ghislain McKey, Doyle B. Baghdadi, Nicolas Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar |
description |
Reducing carbon emissions from deforestation and degradation (REDD) requires detailed insight into how the forest biomass is measured and distributed. Studies so far have estimated forest biomass stocks using rough assumptions and unreliable data. High-resolution data and robust methods are required to capture the spatial variability of forest biomass with sufficient precision. Here we aim to improve on previous approaches by using radar satellite ALOS PALSAR (25-m resolution) and optical Landsat-derived tree cover (30-m resolution) observations to estimate forest biomass stocks in Madagascar, for the years 2007–2010. The radar signal and in situ biomass were highly correlated (R2 = 0.71) and the root mean square error was 30% (for biomass ranging from 0 to 500 t/ha). Using our map at 25-m resolution for the entire island of Madagascar, we estimated the total above-ground forest carbon for the four years 2007, 2008, 2009 and 2010 to be 1.1173 ± 0.0304, 1.1029 ± 0.0303, 1.0916 ± 0.0301 and 1.0773 ± 0.0298 PgC, respectively. Carbon stocks were found to have decreased constantly over this period due to anthropogenic deforestation and likely also to climate change. The results are expected to serve as a more accurate benchmark for monitoring progress on REDD and to provide strong supports for current and future spaceborne missions such as ALOS-2, SAOCOM and BIOMASS. |
format |
article |
topic_facet |
K01 - Foresterie - Considérations générales U30 - Méthodes de recherche http://aims.fao.org/aos/agrovoc/c_4510 |
author |
Ho Tong Minh, Dinh Ndikumana, Emile Vieilledent, Ghislain McKey, Doyle B. Baghdadi, Nicolas |
author_facet |
Ho Tong Minh, Dinh Ndikumana, Emile Vieilledent, Ghislain McKey, Doyle B. Baghdadi, Nicolas |
author_sort |
Ho Tong Minh, Dinh |
title |
Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar |
title_short |
Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar |
title_full |
Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar |
title_fullStr |
Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar |
title_full_unstemmed |
Potential value of combining ALOS PALSAR and Landsat-derived tree cover data for forest biomass retrieval in Madagascar |
title_sort |
potential value of combining alos palsar and landsat-derived tree cover data for forest biomass retrieval in madagascar |
url |
http://agritrop.cirad.fr/587923/ http://agritrop.cirad.fr/587923/7/1-s2.0-S0034425718302104-main.pdf |
work_keys_str_mv |
AT hotongminhdinh potentialvalueofcombiningalospalsarandlandsatderivedtreecoverdataforforestbiomassretrievalinmadagascar AT ndikumanaemile potentialvalueofcombiningalospalsarandlandsatderivedtreecoverdataforforestbiomassretrievalinmadagascar AT vieilledentghislain potentialvalueofcombiningalospalsarandlandsatderivedtreecoverdataforforestbiomassretrievalinmadagascar AT mckeydoyleb potentialvalueofcombiningalospalsarandlandsatderivedtreecoverdataforforestbiomassretrievalinmadagascar AT baghdadinicolas potentialvalueofcombiningalospalsarandlandsatderivedtreecoverdataforforestbiomassretrievalinmadagascar |
_version_ |
1758025739499732992 |