Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway
Most δ18O values of samples from the principal river are within the range -12.5 to -14.0‰. Because new snow tends to be relatively depeleted of δ18O, water leaving the glacier early in the summer has low δ18O values. Subsequently, values rise as contributions of old snow, glacier ice, and their melt...
Main Author: | |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1988
|
Subjects: | |
Online Access: | https://research.manchester.ac.uk/en/publications/a45a3a5b-bdd1-4bf2-b98b-b51df940e29d |
id |
ftumanchesterpub:oai:pure.atira.dk:publications/a45a3a5b-bdd1-4bf2-b98b-b51df940e29d |
---|---|
record_format |
openpolar |
spelling |
ftumanchesterpub:oai:pure.atira.dk:publications/a45a3a5b-bdd1-4bf2-b98b-b51df940e29d 2023-11-12T04:17:31+01:00 Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway Theakstone, W. H. 1988 https://research.manchester.ac.uk/en/publications/a45a3a5b-bdd1-4bf2-b98b-b51df940e29d eng eng info:eu-repo/semantics/restrictedAccess Theakstone , W H 1988 , ' Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway ' , Journal of Glaciology , vol. 34 , no. 118 , pp. 309-317 . article 1988 ftumanchesterpub 2023-10-30T09:11:12Z Most δ18O values of samples from the principal river are within the range -12.5 to -14.0‰. Because new snow tends to be relatively depeleted of δ18O, water leaving the glacier early in the summer has low δ18O values. Subsequently, values rise as contributions of old snow, glacier ice, and their melt waters, which are isotopically heavier (median δ18O values generally above -12.0‰) dilute the δ18O-depleted base-flow. Towards the end of the summer, as surface melting declines, δ18O values tend to fall. Between-year differences of within-summer trends reflect differences of development of the glacier's drainage systems. The drainage systems are affected by outbursts from a glacier-dammed lake. During fine weather, δ18O variations follow the diurnal cycle of surface melting: they are strongly correlated with, but lag behind, air temperatures. -from Author Article in Journal/Newspaper glacier Journal of Glaciology The University of Manchester: Research Explorer austre Okstindbreen ENVELOPE(14.293,14.293,66.014,66.014) Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Norway Okstindbreen ENVELOPE(14.148,14.148,65.987,65.987) |
institution |
Open Polar |
collection |
The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
Most δ18O values of samples from the principal river are within the range -12.5 to -14.0‰. Because new snow tends to be relatively depeleted of δ18O, water leaving the glacier early in the summer has low δ18O values. Subsequently, values rise as contributions of old snow, glacier ice, and their melt waters, which are isotopically heavier (median δ18O values generally above -12.0‰) dilute the δ18O-depleted base-flow. Towards the end of the summer, as surface melting declines, δ18O values tend to fall. Between-year differences of within-summer trends reflect differences of development of the glacier's drainage systems. The drainage systems are affected by outbursts from a glacier-dammed lake. During fine weather, δ18O variations follow the diurnal cycle of surface melting: they are strongly correlated with, but lag behind, air temperatures. -from Author |
format |
Article in Journal/Newspaper |
author |
Theakstone, W. H. |
spellingShingle |
Theakstone, W. H. Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway |
author_facet |
Theakstone, W. H. |
author_sort |
Theakstone, W. H. |
title |
Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway |
title_short |
Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway |
title_full |
Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway |
title_fullStr |
Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway |
title_full_unstemmed |
Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway |
title_sort |
temporal variations of isotopic composition of glacier-river water during summer: observations at austre okstindbreen, okstindan, norway |
publishDate |
1988 |
url |
https://research.manchester.ac.uk/en/publications/a45a3a5b-bdd1-4bf2-b98b-b51df940e29d |
long_lat |
ENVELOPE(14.293,14.293,66.014,66.014) ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(14.148,14.148,65.987,65.987) |
geographic |
austre Okstindbreen Dammed Lake Norway Okstindbreen |
geographic_facet |
austre Okstindbreen Dammed Lake Norway Okstindbreen |
genre |
glacier Journal of Glaciology |
genre_facet |
glacier Journal of Glaciology |
op_source |
Theakstone , W H 1988 , ' Temporal variations of isotopic composition of glacier-river water during summer: observations at Austre Okstindbreen, Okstindan, Norway ' , Journal of Glaciology , vol. 34 , no. 118 , pp. 309-317 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1782334380388122624 |