Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems
Arctic river icings are surface ice accumulations that can be >10 km2 in area and >10 m thick. They commonly impact the hydrology, geomorphology, and ecology of Arctic river environments. Previous examination of icing dynamics in Arctic Alaska found no substantial changes in extent through 200...
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ftcarolinadr:cdr.lib.unc.edu:fn107780f 2023-10-01T03:52:53+02:00 Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems Pavelsky, T.M. Zarnetske, J.P. College of Arts and Sciences, Department of Geological Sciences 2017 https://doi.org/10.17615/1c7f-fr10 https://cdr.lib.unc.edu/downloads/qr46r965z?file=thumbnail https://cdr.lib.unc.edu/downloads/qr46r965z English eng Blackwell Publishing Ltd https://doi.org/10.17615/1c7f-fr10 https://cdr.lib.unc.edu/downloads/qr46r965z?file=thumbnail https://cdr.lib.unc.edu/downloads/qr46r965z http://rightsstatements.org/vocab/InC/1.0/ Geophysical Research Letters, 44(7) aufeis climate change rivers icing remote sensing Alaska Article 2017 ftcarolinadr https://doi.org/10.17615/1c7f-fr10 2023-09-02T22:30:49Z Arctic river icings are surface ice accumulations that can be >10 km2 in area and >10 m thick. They commonly impact the hydrology, geomorphology, and ecology of Arctic river environments. Previous examination of icing dynamics in Arctic Alaska found no substantial changes in extent through 2005. However, here we use daily time series of satellite imagery for 2000–2015 to demonstrate that the temporal persistence and minimum summertime extent of large icings in part of Arctic Alaska and Canada have declined rapidly. We identified 122 large ephemeral icings, and 70 are disappearing significantly earlier in the summer, with a mean trend of −1.6 ± 0.9 day−1 for fully ephemeral features. Additionally, 14 of 25 icings that usually persist through the summer have significantly smaller minimum extents (−2.6 ± 1.6% yr−1). These declines are remarkably rapid and suggest that Arctic hydroclimatic systems generating icings, and their associated ecosystems, are changing rapidly. Article in Journal/Newspaper Arctic Climate change Alaska Carolina Digital Repository (UNC - University of North Carolina) Arctic Canada |
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Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
aufeis climate change rivers icing remote sensing Alaska |
spellingShingle |
aufeis climate change rivers icing remote sensing Alaska Pavelsky, T.M. Zarnetske, J.P. Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems |
topic_facet |
aufeis climate change rivers icing remote sensing Alaska |
description |
Arctic river icings are surface ice accumulations that can be >10 km2 in area and >10 m thick. They commonly impact the hydrology, geomorphology, and ecology of Arctic river environments. Previous examination of icing dynamics in Arctic Alaska found no substantial changes in extent through 2005. However, here we use daily time series of satellite imagery for 2000–2015 to demonstrate that the temporal persistence and minimum summertime extent of large icings in part of Arctic Alaska and Canada have declined rapidly. We identified 122 large ephemeral icings, and 70 are disappearing significantly earlier in the summer, with a mean trend of −1.6 ± 0.9 day−1 for fully ephemeral features. Additionally, 14 of 25 icings that usually persist through the summer have significantly smaller minimum extents (−2.6 ± 1.6% yr−1). These declines are remarkably rapid and suggest that Arctic hydroclimatic systems generating icings, and their associated ecosystems, are changing rapidly. |
author2 |
College of Arts and Sciences, Department of Geological Sciences |
format |
Article in Journal/Newspaper |
author |
Pavelsky, T.M. Zarnetske, J.P. |
author_facet |
Pavelsky, T.M. Zarnetske, J.P. |
author_sort |
Pavelsky, T.M. |
title |
Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems |
title_short |
Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems |
title_full |
Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems |
title_fullStr |
Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems |
title_full_unstemmed |
Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems |
title_sort |
rapid decline in river icings detected in arctic alaska: implications for a changing hydrologic cycle and river ecosystems |
publisher |
Blackwell Publishing Ltd |
publishDate |
2017 |
url |
https://doi.org/10.17615/1c7f-fr10 https://cdr.lib.unc.edu/downloads/qr46r965z?file=thumbnail https://cdr.lib.unc.edu/downloads/qr46r965z |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Climate change Alaska |
genre_facet |
Arctic Climate change Alaska |
op_source |
Geophysical Research Letters, 44(7) |
op_relation |
https://doi.org/10.17615/1c7f-fr10 https://cdr.lib.unc.edu/downloads/qr46r965z?file=thumbnail https://cdr.lib.unc.edu/downloads/qr46r965z |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/1c7f-fr10 |
_version_ |
1778519092741799936 |