Characteristics of aufeis for the Chukotka region derived from Landsat images (2013-2019)

Present-day aufeis dataset was created by Landsat-8 OLI images for the period 2013-2019. Each aufeis was delineated by satellite images as polygon. Cloud-free Landsat images are obtained immediately after snowmelt season, to detect the highest possible number of aufeis. Critical values of Normalized...

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Bibliographic Details
Main Authors: Makarieva, Olga, Shikhov, Andrey, Ostashov, Andrey, Nesterova, Nataliia, Semakina, Anastassiya
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2020
Subjects:
aufeis
Chukitka
Historical Cadastre
Landsat
Reference/source
Identification
DATE/TIME
Comment
Aufeis area
LATITUDE
LONGITUDE
ELEVATION
Multiple investigations
Remote sensing Landsat
Aster GDEM
Chukotka
Online Access:https://dx.doi.org/10.1594/pangaea.925430
https://doi.pangaea.de/10.1594/PANGAEA.925430
Description
Summary:Present-day aufeis dataset was created by Landsat-8 OLI images for the period 2013-2019. Each aufeis was delineated by satellite images as polygon. Cloud-free Landsat images are obtained immediately after snowmelt season, to detect the highest possible number of aufeis. Critical values of Normalized Difference Snow Index (NDSI) were used for semi-automated aufeis detection. However, a detailed expert-based verification was performed after automated procedure, to distinguish snow-covered areas from aufeis and cross-reference historical and satellite-based data collections. According to Landsat data, the number of aufeis reaches 2758, with their total area about 1147.1 km². The difference between the Cadastre (1958) and the satellite-derived data may indicate significant changes of aufeis formation environments.

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