High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island
Given the remoteness and challenging environmental conditions on sub-Antarctic Marion Island, continuous high-resolution studies of the island’s natural water systems are rare. Subsequently, current understanding of the island’s hydrochemistry is based entirely on manual point-based measurements. To...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Water Research Commission (WRC)
2018
|
Subjects: | |
Online Access: | https://www.ajol.info/index.php/wsa/article/view/170337 |
id |
ftjafricanj:oai:ojs.ajol.info:article/170337 |
---|---|
record_format |
openpolar |
spelling |
ftjafricanj:oai:ojs.ajol.info:article/170337 2023-05-15T13:37:59+02:00 High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island Stowe, M-J Hedding, DW Eckardt, FD Nel, W 2018-04-26 application/pdf https://www.ajol.info/index.php/wsa/article/view/170337 eng eng Water Research Commission (WRC) https://www.ajol.info/index.php/wsa/article/view/170337/159767 https://www.ajol.info/index.php/wsa/article/view/170337 Copyright for articles published in this journal is retained by the Water Research Commission. Water SA; Vol 44, No 2 (2018); 283-289 0378-4738 diurnal diel cycles in situ Marion Island sub-Antarctic info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2018 ftjafricanj 2018-04-29T00:02:59Z Given the remoteness and challenging environmental conditions on sub-Antarctic Marion Island, continuous high-resolution studies of the island’s natural water systems are rare. Subsequently, current understanding of the island’s hydrochemistry is based entirely on manual point-based measurements. To address this research gap we analysed continuous, in-situ highfrequency physicochemical measurements (pH, water temperature, dissolved oxygen (DO), and electrical conductivity (EC)) from the Soft Plume River over the period 21 April 2015–26 April 2015. We observed a sharp, short-term response from all measurements to a precipitation event that was superimposed on consistent but subtle diel (i.e. 24 h) cycles throughout the study. Total variation in pH and electrical conductivity amounted to 1.3 units and 27.7 μS/cm respectively. Stream water temperature was less variable (6.2°C) than air surface temperature (14.2°C). Total variation in DO was 2.0 mg/L. Aside from the precipitation-induced response, diel oscillations were small and only visible through the use of continuous, highresolution monitoring. Findings highlight the advantages of continuous high-frequency monitoring in capturing the range of daily variation and elucidating diel cycles in stream water physicochemistry on sub-Antarctic Marion Island that have not previously been accounted for.Keywords: diurnal, diel cycles, in situ, Marion Island, sub-Antarctic Article in Journal/Newspaper Antarc* Antarctic Marion Island AJOL - African Journals Online Antarctic |
institution |
Open Polar |
collection |
AJOL - African Journals Online |
op_collection_id |
ftjafricanj |
language |
English |
topic |
diurnal diel cycles in situ Marion Island sub-Antarctic |
spellingShingle |
diurnal diel cycles in situ Marion Island sub-Antarctic Stowe, M-J Hedding, DW Eckardt, FD Nel, W High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island |
topic_facet |
diurnal diel cycles in situ Marion Island sub-Antarctic |
description |
Given the remoteness and challenging environmental conditions on sub-Antarctic Marion Island, continuous high-resolution studies of the island’s natural water systems are rare. Subsequently, current understanding of the island’s hydrochemistry is based entirely on manual point-based measurements. To address this research gap we analysed continuous, in-situ highfrequency physicochemical measurements (pH, water temperature, dissolved oxygen (DO), and electrical conductivity (EC)) from the Soft Plume River over the period 21 April 2015–26 April 2015. We observed a sharp, short-term response from all measurements to a precipitation event that was superimposed on consistent but subtle diel (i.e. 24 h) cycles throughout the study. Total variation in pH and electrical conductivity amounted to 1.3 units and 27.7 μS/cm respectively. Stream water temperature was less variable (6.2°C) than air surface temperature (14.2°C). Total variation in DO was 2.0 mg/L. Aside from the precipitation-induced response, diel oscillations were small and only visible through the use of continuous, highresolution monitoring. Findings highlight the advantages of continuous high-frequency monitoring in capturing the range of daily variation and elucidating diel cycles in stream water physicochemistry on sub-Antarctic Marion Island that have not previously been accounted for.Keywords: diurnal, diel cycles, in situ, Marion Island, sub-Antarctic |
format |
Article in Journal/Newspaper |
author |
Stowe, M-J Hedding, DW Eckardt, FD Nel, W |
author_facet |
Stowe, M-J Hedding, DW Eckardt, FD Nel, W |
author_sort |
Stowe, M-J |
title |
High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island |
title_short |
High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island |
title_full |
High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island |
title_fullStr |
High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island |
title_full_unstemmed |
High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island |
title_sort |
high-frequency monitoring of stream water physicochemistry on sub-antarctic marion island |
publisher |
Water Research Commission (WRC) |
publishDate |
2018 |
url |
https://www.ajol.info/index.php/wsa/article/view/170337 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Marion Island |
genre_facet |
Antarc* Antarctic Marion Island |
op_source |
Water SA; Vol 44, No 2 (2018); 283-289 0378-4738 |
op_relation |
https://www.ajol.info/index.php/wsa/article/view/170337/159767 https://www.ajol.info/index.php/wsa/article/view/170337 |
op_rights |
Copyright for articles published in this journal is retained by the Water Research Commission. |
_version_ |
1766100248627773440 |