Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery
ABSTRACT Multiple studies on regional glacier mass balance in the Pamir Mountains have been conducted using the geodetic method, but they were rarely extended to the period before 2000. In this study, we used KH-9 imagery acquired in 1975 to generate the historical DEM for the central Pamir, and the...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2019.8 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301900008X |
id |
crcambridgeupr:10.1017/jog.2019.8 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2019.8 2024-06-23T07:54:15+00:00 Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery ZHOU, YUSHAN LI, ZHIWEI LI, JIA ZHAO, RONG DING, XIAOLI 2019 http://dx.doi.org/10.1017/jog.2019.8 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301900008X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 65, issue 250, page 309-320 ISSN 0022-1430 1727-5652 journal-article 2019 crcambridgeupr https://doi.org/10.1017/jog.2019.8 2024-06-05T04:04:52Z ABSTRACT Multiple studies on regional glacier mass balance in the Pamir Mountains have been conducted using the geodetic method, but they were rarely extended to the period before 2000. In this study, we used KH-9 imagery acquired in 1975 to generate the historical DEM for the central Pamir, and then obtained the glacier elevation change by comparing this with the SRTM C-band DEM. The penetration depth of the C-band radar was corrected for different glacier surfaces, i.e. 2.96, 1.68 and 0 m for firn/snow cover, bare ice and debris-covered areas, respectively. The final results suggest that the central Pamir glaciers, overall, experienced a near-zero mass balance of −0.03 ± 0.24 m w.e. a −1 for 1975–99. Due to glacier surge activity, the elevation change patterns of individual glaciers were highly variable, and their mass balances varied from −0.12 ± 0.26 to 0.63 ± 0.20 m w.e. a −1 . The mean mass budgets of the surge-type glaciers and non-surge-type glaciers were 0.03 ± 0.14 and −0.05 ± 0.28 m w.e. a −1 , respectively. Concurring with previous studies, we conclude that the central Pamir glaciers may have been in a state of approximately balanced mass budget or slight mass deficit from the mid-1970s to the mid-2010s. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Geodetic Glacier ENVELOPE(163.800,163.800,-77.750,-77.750) Journal of Glaciology 65 250 309 320 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
ABSTRACT Multiple studies on regional glacier mass balance in the Pamir Mountains have been conducted using the geodetic method, but they were rarely extended to the period before 2000. In this study, we used KH-9 imagery acquired in 1975 to generate the historical DEM for the central Pamir, and then obtained the glacier elevation change by comparing this with the SRTM C-band DEM. The penetration depth of the C-band radar was corrected for different glacier surfaces, i.e. 2.96, 1.68 and 0 m for firn/snow cover, bare ice and debris-covered areas, respectively. The final results suggest that the central Pamir glaciers, overall, experienced a near-zero mass balance of −0.03 ± 0.24 m w.e. a −1 for 1975–99. Due to glacier surge activity, the elevation change patterns of individual glaciers were highly variable, and their mass balances varied from −0.12 ± 0.26 to 0.63 ± 0.20 m w.e. a −1 . The mean mass budgets of the surge-type glaciers and non-surge-type glaciers were 0.03 ± 0.14 and −0.05 ± 0.28 m w.e. a −1 , respectively. Concurring with previous studies, we conclude that the central Pamir glaciers may have been in a state of approximately balanced mass budget or slight mass deficit from the mid-1970s to the mid-2010s. |
format |
Article in Journal/Newspaper |
author |
ZHOU, YUSHAN LI, ZHIWEI LI, JIA ZHAO, RONG DING, XIAOLI |
spellingShingle |
ZHOU, YUSHAN LI, ZHIWEI LI, JIA ZHAO, RONG DING, XIAOLI Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery |
author_facet |
ZHOU, YUSHAN LI, ZHIWEI LI, JIA ZHAO, RONG DING, XIAOLI |
author_sort |
ZHOU, YUSHAN |
title |
Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery |
title_short |
Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery |
title_full |
Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery |
title_fullStr |
Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery |
title_full_unstemmed |
Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery |
title_sort |
geodetic glacier mass balance (1975–1999) in the central pamir using the srtm dem and kh-9 imagery |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/jog.2019.8 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301900008X |
long_lat |
ENVELOPE(163.800,163.800,-77.750,-77.750) |
geographic |
Geodetic Glacier |
geographic_facet |
Geodetic Glacier |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 65, issue 250, page 309-320 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2019.8 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
250 |
container_start_page |
309 |
op_container_end_page |
320 |
_version_ |
1802646356164083712 |