Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory
Due to adverse snow and cloud conditions, only a few inventories are available for the maritime glaciers in New Zealand. These are difficult to compare as different approaches and baseline data have been used to create them. In consequence, glacier fluctuations in New Zealand over the past two decad...
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International Glaciological Society
2023
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ftunivzuerich:oai:www.zora.uzh.ch:258750 2024-04-21T07:46:01+00:00 Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory Paul, Frank Baumann, Sabine Anderson, Brian Rastner, Philipp 2023-04-20 application/pdf https://www.zora.uzh.ch/id/eprint/258750/ https://www.zora.uzh.ch/id/eprint/258750/1/ZORA_div_class_title_deriving_a_year_2000_glacier_inventory_for_new_zealand_from_the_existing_2016_inventory_div.pdf https://doi.org/10.5167/uzh-258750 https://doi.org/10.1017/aog.2023.20 eng eng International Glaciological Society https://www.zora.uzh.ch/id/eprint/258750/1/ZORA_div_class_title_deriving_a_year_2000_glacier_inventory_for_new_zealand_from_the_existing_2016_inventory_div.pdf doi:10.5167/uzh-258750 doi:10.1017/aog.2023.20 urn:issn:0260-3055 info:eu-repo/semantics/openAccess Creative Commons: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) http://creativecommons.org/licenses/by-nc-nd/4.0/ Paul, Frank; Baumann, Sabine; Anderson, Brian; Rastner, Philipp (2023). Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory. Annals of Glaciology:1-11. Institute of Geography 910 Geography & travel Earth-Surface Processes Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftunivzuerich https://doi.org/10.5167/uzh-25875010.1017/aog.2023.20 2024-03-27T16:45:16Z Due to adverse snow and cloud conditions, only a few inventories are available for the maritime glaciers in New Zealand. These are difficult to compare as different approaches and baseline data have been used to create them. In consequence, glacier fluctuations in New Zealand over the past two decades are only known for a few glaciers based on field observations. Here we present the results of a new inventory for the ‘year 2000’ (some scenes are from 2001 and 2002) that is based on glacier outlines from a recently published inventory for the year 2016 and allowed consistent change assessment for nearly 3000 glaciers over this period. The year 2000 inventory was created by manual on-screen digitizing using Landsat ETM+ satellite imagery (15 m panchromatic band) in the background and the year 2016 outlines as a starting point. Major challenges faced were late and early seasonal snow, clouds and shadow, the geo-location mismatch between Landsat and Sentinel-2 as well as the correct interpretation of ice patches and ice under debris cover. In total, we re-mapped 2967 glaciers covering an area of 885.5 km$^{2}$ in 2000, which is 91.7 km$^{2}$ (or 10.4%) more than the 793.8 km$^{2}$ mapped in 2016. Area change rates (mean rate −0.65% a$^{−1}$) increase towards smaller glaciers. Strongest area loss from 2000 to 2016 occurred at elevations ~1900 m but the highest relative loss was found below 800 m a.s.l. In total, 109 glaciers split into two or more entities and 264 had wasted away by 2016. Article in Journal/Newspaper Annals of Glaciology University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
spellingShingle |
Institute of Geography 910 Geography & travel Earth-Surface Processes Paul, Frank Baumann, Sabine Anderson, Brian Rastner, Philipp Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory |
topic_facet |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
description |
Due to adverse snow and cloud conditions, only a few inventories are available for the maritime glaciers in New Zealand. These are difficult to compare as different approaches and baseline data have been used to create them. In consequence, glacier fluctuations in New Zealand over the past two decades are only known for a few glaciers based on field observations. Here we present the results of a new inventory for the ‘year 2000’ (some scenes are from 2001 and 2002) that is based on glacier outlines from a recently published inventory for the year 2016 and allowed consistent change assessment for nearly 3000 glaciers over this period. The year 2000 inventory was created by manual on-screen digitizing using Landsat ETM+ satellite imagery (15 m panchromatic band) in the background and the year 2016 outlines as a starting point. Major challenges faced were late and early seasonal snow, clouds and shadow, the geo-location mismatch between Landsat and Sentinel-2 as well as the correct interpretation of ice patches and ice under debris cover. In total, we re-mapped 2967 glaciers covering an area of 885.5 km$^{2}$ in 2000, which is 91.7 km$^{2}$ (or 10.4%) more than the 793.8 km$^{2}$ mapped in 2016. Area change rates (mean rate −0.65% a$^{−1}$) increase towards smaller glaciers. Strongest area loss from 2000 to 2016 occurred at elevations ~1900 m but the highest relative loss was found below 800 m a.s.l. In total, 109 glaciers split into two or more entities and 264 had wasted away by 2016. |
format |
Article in Journal/Newspaper |
author |
Paul, Frank Baumann, Sabine Anderson, Brian Rastner, Philipp |
author_facet |
Paul, Frank Baumann, Sabine Anderson, Brian Rastner, Philipp |
author_sort |
Paul, Frank |
title |
Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory |
title_short |
Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory |
title_full |
Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory |
title_fullStr |
Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory |
title_full_unstemmed |
Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory |
title_sort |
deriving a year 2000 glacier inventory for new zealand from the existing 2016 inventory |
publisher |
International Glaciological Society |
publishDate |
2023 |
url |
https://www.zora.uzh.ch/id/eprint/258750/ https://www.zora.uzh.ch/id/eprint/258750/1/ZORA_div_class_title_deriving_a_year_2000_glacier_inventory_for_new_zealand_from_the_existing_2016_inventory_div.pdf https://doi.org/10.5167/uzh-258750 https://doi.org/10.1017/aog.2023.20 |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
Paul, Frank; Baumann, Sabine; Anderson, Brian; Rastner, Philipp (2023). Deriving a year 2000 glacier inventory for New Zealand from the existing 2016 inventory. Annals of Glaciology:1-11. |
op_relation |
https://www.zora.uzh.ch/id/eprint/258750/1/ZORA_div_class_title_deriving_a_year_2000_glacier_inventory_for_new_zealand_from_the_existing_2016_inventory_div.pdf doi:10.5167/uzh-258750 doi:10.1017/aog.2023.20 urn:issn:0260-3055 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.5167/uzh-25875010.1017/aog.2023.20 |
_version_ |
1796942317908656128 |