Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA)
The velocity of ice flow in the Antarctic is a crucial factor to determine ice discharge and thus future sea level rise. Feature tracking has been widely used in optical and radar imagery with fine resolution to retrieve flow parameters, although the primitive result may be contaminated by noise. In...
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ftdoajarticles:oai:doaj.org/article:9a8cbcc1d6e840a08d0b5138e2330b46 2023-05-15T13:52:51+02:00 Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) Teng Li Yan Liu Tian Li Fengming Hui Zhuoqi Chen Xiao Cheng 2018-07-01T00:00:00Z https://doi.org/10.3390/rs10071045 https://doaj.org/article/9a8cbcc1d6e840a08d0b5138e2330b46 EN eng MDPI AG http://www.mdpi.com/2072-4292/10/7/1045 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs10071045 https://doaj.org/article/9a8cbcc1d6e840a08d0b5138e2330b46 Remote Sensing, Vol 10, Iss 7, p 1045 (2018) Antarctic ice velocity feature tracking COSI-Corr filter MOA Science Q article 2018 ftdoajarticles https://doi.org/10.3390/rs10071045 2022-12-30T20:19:34Z The velocity of ice flow in the Antarctic is a crucial factor to determine ice discharge and thus future sea level rise. Feature tracking has been widely used in optical and radar imagery with fine resolution to retrieve flow parameters, although the primitive result may be contaminated by noise. In this paper, we present a series of modified post-processing steps, such as SNR thresholding by residual, complex Butterworth filters, and triple standard deviation truncation, to improve the performance of primitive results, and apply it to MODIS-based Mosaic of Antarctica (MOA) datasets. The final velocity field result displays the general flow pattern of the peripheral Antarctic. Seventy-eight out of 97 streamlines starting from seed points are smooth and continuous. The RMSE with 178 manually selected tie points is within 60 m·a−1. The systematic comparison with Making Earth System Data Records for Use in Research Environments (MEaSUREs) datasets in seven drainages shows that the results regarding high magnitude and large-scale ice shelf are highly reliable; absolute mean and median difference are less than 18 m·a−1, while the result of localized drainage suffered from too much tracking error. The relative differences from manually selected and random points are controlled within 8% when speed is beyond 500 m·a−1, but bias and uncertainty are pronounced when speed is lower than that. The result through our accuracy control strategy highlights that coarse remote-sensed images such as Moderate Resolution Imaging Spectrophotometer (MODIS) can still offer the capability for comprehensive and long-term continental ice sheet surface velocity mapping. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Directory of Open Access Journals: DOAJ Articles Antarctic Butterworth ENVELOPE(66.733,66.733,-70.700,-70.700) Moa ENVELOPE(157.950,157.950,-80.767,-80.767) The Antarctic Remote Sensing 10 7 1045 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic ice velocity feature tracking COSI-Corr filter MOA Science Q |
spellingShingle |
Antarctic ice velocity feature tracking COSI-Corr filter MOA Science Q Teng Li Yan Liu Tian Li Fengming Hui Zhuoqi Chen Xiao Cheng Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) |
topic_facet |
Antarctic ice velocity feature tracking COSI-Corr filter MOA Science Q |
description |
The velocity of ice flow in the Antarctic is a crucial factor to determine ice discharge and thus future sea level rise. Feature tracking has been widely used in optical and radar imagery with fine resolution to retrieve flow parameters, although the primitive result may be contaminated by noise. In this paper, we present a series of modified post-processing steps, such as SNR thresholding by residual, complex Butterworth filters, and triple standard deviation truncation, to improve the performance of primitive results, and apply it to MODIS-based Mosaic of Antarctica (MOA) datasets. The final velocity field result displays the general flow pattern of the peripheral Antarctic. Seventy-eight out of 97 streamlines starting from seed points are smooth and continuous. The RMSE with 178 manually selected tie points is within 60 m·a−1. The systematic comparison with Making Earth System Data Records for Use in Research Environments (MEaSUREs) datasets in seven drainages shows that the results regarding high magnitude and large-scale ice shelf are highly reliable; absolute mean and median difference are less than 18 m·a−1, while the result of localized drainage suffered from too much tracking error. The relative differences from manually selected and random points are controlled within 8% when speed is beyond 500 m·a−1, but bias and uncertainty are pronounced when speed is lower than that. The result through our accuracy control strategy highlights that coarse remote-sensed images such as Moderate Resolution Imaging Spectrophotometer (MODIS) can still offer the capability for comprehensive and long-term continental ice sheet surface velocity mapping. |
format |
Article in Journal/Newspaper |
author |
Teng Li Yan Liu Tian Li Fengming Hui Zhuoqi Chen Xiao Cheng |
author_facet |
Teng Li Yan Liu Tian Li Fengming Hui Zhuoqi Chen Xiao Cheng |
author_sort |
Teng Li |
title |
Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) |
title_short |
Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) |
title_full |
Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) |
title_fullStr |
Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) |
title_full_unstemmed |
Antarctic Surface Ice Velocity Retrieval from MODIS-Based Mosaic of Antarctica (MOA) |
title_sort |
antarctic surface ice velocity retrieval from modis-based mosaic of antarctica (moa) |
publisher |
MDPI AG |
publishDate |
2018 |
url |
https://doi.org/10.3390/rs10071045 https://doaj.org/article/9a8cbcc1d6e840a08d0b5138e2330b46 |
long_lat |
ENVELOPE(66.733,66.733,-70.700,-70.700) ENVELOPE(157.950,157.950,-80.767,-80.767) |
geographic |
Antarctic Butterworth Moa The Antarctic |
geographic_facet |
Antarctic Butterworth Moa The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf |
op_source |
Remote Sensing, Vol 10, Iss 7, p 1045 (2018) |
op_relation |
http://www.mdpi.com/2072-4292/10/7/1045 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs10071045 https://doaj.org/article/9a8cbcc1d6e840a08d0b5138e2330b46 |
op_doi |
https://doi.org/10.3390/rs10071045 |
container_title |
Remote Sensing |
container_volume |
10 |
container_issue |
7 |
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1045 |
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1766257609408512000 |