IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska
Figure 1. IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska. Training sites used for the supervised classification and validation sites used for accuracy assessment are also shown. Abstract Climate-induc...
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ftdatacite:10.6084/m9.figshare.1011730 2023-05-15T16:37:20+02:00 IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska E F Belshe E A G Schuur G Grosse 2013 https://dx.doi.org/10.6084/m9.figshare.1011730 https://iop.figshare.com/articles/figure/_IKONOS_image_taken_during_June_2008_of_the_EML_watershed_and_adjacent_hill_slope_10_4_km_sup_2_sup_/1011730 unknown IOP Publishing Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Environmental Science Image Figure graphic ImageObject 2013 ftdatacite https://doi.org/10.6084/m9.figshare.1011730 2021-11-05T12:55:41Z Figure 1. IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska. Training sites used for the supervised classification and validation sites used for accuracy assessment are also shown. Abstract Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region. Permafrost thaw is temporally dynamic and spatially heterogeneous because, in addition to the thickening of the active layer, localized thermokarst features form when ice-rich permafrost thaws and the ground subsides. Thermokarst produces a diversity of landforms and alters the physical environment in dynamic ways. To estimate potential changes to the carbon cycle it is imperative to quantify the size and distribution of thermokarst landforms. By performing a supervised classification on a high resolution IKONOS image, we detected and mapped small, irregular thermokarst features occurring within an upland watershed in discontinuous permafrost of Interior Alaska. We found that 12% of the Eight Mile Lake (EML) watershed has undergone thermokarst, predominantly in valleys where tussock tundra resides. About 35% of the 3.7 km 2 tussock tundra class has likely transitioned to thermokarst. These landscape level changes created by permafrost thaw at EML have important implications for ecosystem carbon cycling because thermokarst features are forming in carbon-rich areas and are altering the hydrology in ways that increase seasonal thawing of the soil. Still Image Ice permafrost Thermokarst Tundra Alaska DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Environmental Science |
spellingShingle |
Environmental Science E F Belshe E A G Schuur G Grosse IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska |
topic_facet |
Environmental Science |
description |
Figure 1. IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska. Training sites used for the supervised classification and validation sites used for accuracy assessment are also shown. Abstract Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region. Permafrost thaw is temporally dynamic and spatially heterogeneous because, in addition to the thickening of the active layer, localized thermokarst features form when ice-rich permafrost thaws and the ground subsides. Thermokarst produces a diversity of landforms and alters the physical environment in dynamic ways. To estimate potential changes to the carbon cycle it is imperative to quantify the size and distribution of thermokarst landforms. By performing a supervised classification on a high resolution IKONOS image, we detected and mapped small, irregular thermokarst features occurring within an upland watershed in discontinuous permafrost of Interior Alaska. We found that 12% of the Eight Mile Lake (EML) watershed has undergone thermokarst, predominantly in valleys where tussock tundra resides. About 35% of the 3.7 km 2 tussock tundra class has likely transitioned to thermokarst. These landscape level changes created by permafrost thaw at EML have important implications for ecosystem carbon cycling because thermokarst features are forming in carbon-rich areas and are altering the hydrology in ways that increase seasonal thawing of the soil. |
format |
Still Image |
author |
E F Belshe E A G Schuur G Grosse |
author_facet |
E F Belshe E A G Schuur G Grosse |
author_sort |
E F Belshe |
title |
IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska |
title_short |
IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska |
title_full |
IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska |
title_fullStr |
IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska |
title_full_unstemmed |
IKONOS image taken during June 2008 of the EML watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in Healy, Alaska |
title_sort |
ikonos image taken during june 2008 of the eml watershed and adjacent hill slope (10.4 km 2 study area outlined in white) located in healy, alaska |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://dx.doi.org/10.6084/m9.figshare.1011730 https://iop.figshare.com/articles/figure/_IKONOS_image_taken_during_June_2008_of_the_EML_watershed_and_adjacent_hill_slope_10_4_km_sup_2_sup_/1011730 |
genre |
Ice permafrost Thermokarst Tundra Alaska |
genre_facet |
Ice permafrost Thermokarst Tundra Alaska |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.1011730 |
_version_ |
1766027627855872000 |