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Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data

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dc.contributor.author Gjermundsen, EF
dc.contributor.author Mathieu, Renaud SA
dc.contributor.author Kaab, A
dc.contributor.author Chinn, T
dc.contributor.author Fitzharris, B
dc.contributor.author Hagen, JO
dc.date.accessioned 2012-01-09T09:29:57Z
dc.date.available 2012-01-09T09:29:57Z
dc.date.issued 2011-09
dc.identifier.citation Gjermundsen, E.F., Mathieu, R.S.A., Kaab, A. 2012. Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data. Journal of Glaciology, Vol 57(204), pp 667-683 en_US
dc.identifier.issn 0022-1430
dc.identifier.uri http://folk.uio.no/kaeaeb/publications/nz_change.pdf
dc.identifier.uri http://hdl.handle.net/10204/5450
dc.description Copyright: 2011 International Glaciological Society en_US
dc.description.abstract The authors have measured the glacier area changes in the central Southern Alps, New Zealand, between 1978 and 2002 and have compiled the 2002 glacier outlines using an image scene from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). Three automated classification methods were tested: (1) band ratio, (2) normalized-difference snow index and (3) supervised classification. The results were compared with the glacier outlines photo-interpreted from the ASTER data, and were further validated using GPS-aided field mapping of selected test glaciers. The ASTER 3/4 band ratio provided the best results. However, all the classification methods failed to extract extensive debris-covered parts of the glaciers. Therefore, the photo-interpreted 2002 outlines were used when comparing with the existing 1978 glacier inventory derived from aerial photographs. Their results show a 17% reduction of glacier area, mainly driven by the retreat of the large valley glaciers. Despite the large climatic gradient from west to east, glaciers on both sides of the Main Divide lost similar percentages of area, except Franz Josef and Fox Glaciers which advanced. Smaller glaciers were found to have changed very little in the study period. en_US
dc.language.iso en en_US
dc.publisher International Glaciological Society en_US
dc.relation.ispartofseries Workflow request;7611
dc.subject New Zealand Southern Alps en_US
dc.subject Glaciers en_US
dc.subject Glacier outlines en_US
dc.subject Glaciology en_US
dc.subject Glacier mapping en_US
dc.subject ASTER satellite data en_US
dc.title Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data en_US
dc.type Article en_US
dc.identifier.apacitation Gjermundsen, E., Mathieu, R. S., Kaab, A., Chinn, T., Fitzharris, B., & Hagen, J. (2011). Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data. http://hdl.handle.net/10204/5450 en_ZA
dc.identifier.chicagocitation Gjermundsen, EF, Renaud SA Mathieu, A Kaab, T Chinn, B Fitzharris, and JO Hagen "Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data." (2011) http://hdl.handle.net/10204/5450 en_ZA
dc.identifier.vancouvercitation Gjermundsen E, Mathieu RS, Kaab A, Chinn T, Fitzharris B, Hagen J. Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data. 2011; http://hdl.handle.net/10204/5450. en_ZA
dc.identifier.ris TY - Article AU - Gjermundsen, EF AU - Mathieu, Renaud SA AU - Kaab, A AU - Chinn, T AU - Fitzharris, B AU - Hagen, JO AB - The authors have measured the glacier area changes in the central Southern Alps, New Zealand, between 1978 and 2002 and have compiled the 2002 glacier outlines using an image scene from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). Three automated classification methods were tested: (1) band ratio, (2) normalized-difference snow index and (3) supervised classification. The results were compared with the glacier outlines photo-interpreted from the ASTER data, and were further validated using GPS-aided field mapping of selected test glaciers. The ASTER 3/4 band ratio provided the best results. However, all the classification methods failed to extract extensive debris-covered parts of the glaciers. Therefore, the photo-interpreted 2002 outlines were used when comparing with the existing 1978 glacier inventory derived from aerial photographs. Their results show a 17% reduction of glacier area, mainly driven by the retreat of the large valley glaciers. Despite the large climatic gradient from west to east, glaciers on both sides of the Main Divide lost similar percentages of area, except Franz Josef and Fox Glaciers which advanced. Smaller glaciers were found to have changed very little in the study period. DA - 2011-09 DB - ResearchSpace DP - CSIR KW - New Zealand Southern Alps KW - Glaciers KW - Glacier outlines KW - Glaciology KW - Glacier mapping KW - ASTER satellite data LK - https://researchspace.csir.co.za PY - 2011 SM - 0022-1430 T1 - Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data TI - Assessment of multispectral glacier mapping methods and derivation of glacier area changes, 1978–2002, in the central Southern Alps, New Zealand, from ASTER satellite data, field survey and existing inventory data UR - http://hdl.handle.net/10204/5450 ER - en_ZA


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