Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach
Streamflow reconstructions based on paleoclimate proxies provide much longer records than the short instrumental period records on which water resource management plans are currently based. In Australia there is a lack of in-situ high resolution paleoclimate proxy records, but remote proxies with te...
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ftunivtasmania:oai:eprints.utas.edu.au:27304 2023-05-15T13:31:52+02:00 Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach Tozer, CR Kiem, AS Vance, TR Roberts, JL Curran, MAJ Moy, AD 2018 https://eprints.utas.edu.au/27304/ unknown Elsevier Science Bv Tozer, CR, Kiem, AS, Vance, TR orcid:0000-0001-6970-8646 , Roberts, JL, Curran, MAJ and Moy, AD 2018 , 'Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach' , Journal of Hydrology, vol. 558 , pp. 632-646 , doi:10.1016/j.jhydrol.2018.01.064 <http://dx.doi.org/10.1016/j.jhydrol.2018.01.064>. streamflow reconstruction pre-instrumental climate eastern Australia drought floods streamflow reconstruction paleoclimate Budyko Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1016/j.jhydrol.2018.01.064 2021-09-06T22:18:01Z Streamflow reconstructions based on paleoclimate proxies provide much longer records than the short instrumental period records on which water resource management plans are currently based. In Australia there is a lack of in-situ high resolution paleoclimate proxy records, but remote proxies with teleconnections to Australian climate have utility in producing streamflow reconstructions. Here we investigate, via a case study for a catchment in eastern Australia, the novel use of an Antarctic ice-core based rainfall reconstruction within a Budyko-framework to reconstruct ∼1000 years of annual streamflow. The resulting streamflow reconstruction captures interannual to decadal variability in the instrumental streamflow, validating both the use of the ice core rainfall proxy record and the Budyko-framework method. In the preinstrumental era the streamflow reconstruction shows longer wet and dry epochs and periods of streamflow variability that are higher than observed in the instrumental era. Importantly, for both the instrumental record and preinstrumental reconstructions, the wet (dry) epochs in the rainfall record are shorter (longer) in the streamflow record and this non-linearity must be considered when inferring hydroclimatic risk or historical water availability directly from rainfall proxy records alone. These insights provide a better understanding of present infrastructure vulnerability in the context of past climate variability for eastern Australia. The streamflow reconstruction presented here also provides a better understanding of the range of hydroclimatic variability possible, and therefore represents a more realistic baseline on which to quantify the potential impacts of anthropogenic climate change on water security. Article in Journal/Newspaper Antarc* Antarctic ice core University of Tasmania: UTas ePrints Antarctic Journal of Hydrology 558 632 646 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
unknown |
topic |
streamflow reconstruction pre-instrumental climate eastern Australia drought floods streamflow reconstruction paleoclimate Budyko |
spellingShingle |
streamflow reconstruction pre-instrumental climate eastern Australia drought floods streamflow reconstruction paleoclimate Budyko Tozer, CR Kiem, AS Vance, TR Roberts, JL Curran, MAJ Moy, AD Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach |
topic_facet |
streamflow reconstruction pre-instrumental climate eastern Australia drought floods streamflow reconstruction paleoclimate Budyko |
description |
Streamflow reconstructions based on paleoclimate proxies provide much longer records than the short instrumental period records on which water resource management plans are currently based. In Australia there is a lack of in-situ high resolution paleoclimate proxy records, but remote proxies with teleconnections to Australian climate have utility in producing streamflow reconstructions. Here we investigate, via a case study for a catchment in eastern Australia, the novel use of an Antarctic ice-core based rainfall reconstruction within a Budyko-framework to reconstruct ∼1000 years of annual streamflow. The resulting streamflow reconstruction captures interannual to decadal variability in the instrumental streamflow, validating both the use of the ice core rainfall proxy record and the Budyko-framework method. In the preinstrumental era the streamflow reconstruction shows longer wet and dry epochs and periods of streamflow variability that are higher than observed in the instrumental era. Importantly, for both the instrumental record and preinstrumental reconstructions, the wet (dry) epochs in the rainfall record are shorter (longer) in the streamflow record and this non-linearity must be considered when inferring hydroclimatic risk or historical water availability directly from rainfall proxy records alone. These insights provide a better understanding of present infrastructure vulnerability in the context of past climate variability for eastern Australia. The streamflow reconstruction presented here also provides a better understanding of the range of hydroclimatic variability possible, and therefore represents a more realistic baseline on which to quantify the potential impacts of anthropogenic climate change on water security. |
format |
Article in Journal/Newspaper |
author |
Tozer, CR Kiem, AS Vance, TR Roberts, JL Curran, MAJ Moy, AD |
author_facet |
Tozer, CR Kiem, AS Vance, TR Roberts, JL Curran, MAJ Moy, AD |
author_sort |
Tozer, CR |
title |
Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach |
title_short |
Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach |
title_full |
Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach |
title_fullStr |
Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach |
title_full_unstemmed |
Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach |
title_sort |
reconstructing pre-instrumental streamflow in eastern australia using a water balance approach |
publisher |
Elsevier Science Bv |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/27304/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_relation |
Tozer, CR, Kiem, AS, Vance, TR orcid:0000-0001-6970-8646 , Roberts, JL, Curran, MAJ and Moy, AD 2018 , 'Reconstructing pre-instrumental streamflow in Eastern Australia using a water balance approach' , Journal of Hydrology, vol. 558 , pp. 632-646 , doi:10.1016/j.jhydrol.2018.01.064 <http://dx.doi.org/10.1016/j.jhydrol.2018.01.064>. |
op_doi |
https://doi.org/10.1016/j.jhydrol.2018.01.064 |
container_title |
Journal of Hydrology |
container_volume |
558 |
container_start_page |
632 |
op_container_end_page |
646 |
_version_ |
1766021730765111296 |