A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009)
This paper reports a comparative analysis performed on a fraction-image time series of the Antarctic Peninsula from the period 1999–2009 generated by multiresolution remote-sensing images (SSM/I and SSMI/S with 25 km and QuikSCAT with 2.225 km spatial resolutions) for snow-melt detection. Our method...
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Cambridge University Press
2018
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ftdoajarticles:oai:doaj.org/article:4c1351e02a2d442f999549f3658aa759 2023-05-15T13:29:32+02:00 A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) Marcos W. D. De Freitas Cláudio W. Mendes Júnior Jorge Arigony-Neto Juliana Costi Jefferson C. Simões 2018-07-01T00:00:00Z https://doi.org/10.1017/aog.2017.44 https://doaj.org/article/4c1351e02a2d442f999549f3658aa759 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305517000441/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2017.44 0260-3055 1727-5644 https://doaj.org/article/4c1351e02a2d442f999549f3658aa759 Annals of Glaciology, Vol 59, Pp 16-28 (2018) melt – surface remote sensing snow Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/aog.2017.44 2023-03-12T01:31:57Z This paper reports a comparative analysis performed on a fraction-image time series of the Antarctic Peninsula from the period 1999–2009 generated by multiresolution remote-sensing images (SSM/I and SSMI/S with 25 km and QuikSCAT with 2.225 km spatial resolutions) for snow-melt detection. Our method is based on the (a) preprocessing of multitemporal remote-sensing data, (b) subpixel mixture analysis of SSMI and QuikSCAT image time series, and (c) evaluation of subpixel analysis, including an assessment of fraction images of wet snow using an independent ASAR dataset and sensitivity analysis on the melt metrics measured by these images. The temporal dynamics of the melt indices derived from the wet-snow fraction images presented a more realistic pattern than the traditional melt metrics measured by Boolean snow-melt detection approaches. Because the snow melt actually occurs at the pixel fractions, the multiscale analysis that was performed suggests an overestimation of the melt metrics calculated using Boolean approaches (which assume that the entire area of the detected pixel shows snow melt). The melt metrics measurements show an overestimation according to the decrease in spatial resolution related to the multiplicative effect of a larger pixel area. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Asar ENVELOPE(134.033,134.033,68.667,68.667) Annals of Glaciology 59 76pt1 16 28 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
melt – surface remote sensing snow Meteorology. Climatology QC851-999 |
spellingShingle |
melt – surface remote sensing snow Meteorology. Climatology QC851-999 Marcos W. D. De Freitas Cláudio W. Mendes Júnior Jorge Arigony-Neto Juliana Costi Jefferson C. Simões A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) |
topic_facet |
melt – surface remote sensing snow Meteorology. Climatology QC851-999 |
description |
This paper reports a comparative analysis performed on a fraction-image time series of the Antarctic Peninsula from the period 1999–2009 generated by multiresolution remote-sensing images (SSM/I and SSMI/S with 25 km and QuikSCAT with 2.225 km spatial resolutions) for snow-melt detection. Our method is based on the (a) preprocessing of multitemporal remote-sensing data, (b) subpixel mixture analysis of SSMI and QuikSCAT image time series, and (c) evaluation of subpixel analysis, including an assessment of fraction images of wet snow using an independent ASAR dataset and sensitivity analysis on the melt metrics measured by these images. The temporal dynamics of the melt indices derived from the wet-snow fraction images presented a more realistic pattern than the traditional melt metrics measured by Boolean snow-melt detection approaches. Because the snow melt actually occurs at the pixel fractions, the multiscale analysis that was performed suggests an overestimation of the melt metrics calculated using Boolean approaches (which assume that the entire area of the detected pixel shows snow melt). The melt metrics measurements show an overestimation according to the decrease in spatial resolution related to the multiplicative effect of a larger pixel area. |
format |
Article in Journal/Newspaper |
author |
Marcos W. D. De Freitas Cláudio W. Mendes Júnior Jorge Arigony-Neto Juliana Costi Jefferson C. Simões |
author_facet |
Marcos W. D. De Freitas Cláudio W. Mendes Júnior Jorge Arigony-Neto Juliana Costi Jefferson C. Simões |
author_sort |
Marcos W. D. De Freitas |
title |
A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) |
title_short |
A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) |
title_full |
A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) |
title_fullStr |
A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) |
title_full_unstemmed |
A multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the Antarctic Peninsula (1999–2009) |
title_sort |
multiscale subpixel mixture analysis applied for melt detection using passive microwave and radar scatterometer image time series of the antarctic peninsula (1999–2009) |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/aog.2017.44 https://doaj.org/article/4c1351e02a2d442f999549f3658aa759 |
long_lat |
ENVELOPE(134.033,134.033,68.667,68.667) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Asar |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Asar |
genre |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula |
op_source |
Annals of Glaciology, Vol 59, Pp 16-28 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305517000441/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2017.44 0260-3055 1727-5644 https://doaj.org/article/4c1351e02a2d442f999549f3658aa759 |
op_doi |
https://doi.org/10.1017/aog.2017.44 |
container_title |
Annals of Glaciology |
container_volume |
59 |
container_issue |
76pt1 |
container_start_page |
16 |
op_container_end_page |
28 |
_version_ |
1766001093080252416 |