<div class="csl-bib-body">
<div class="csl-entry">McPhee, J., Hernandez Neira, D. A., Courard, M., Mejías, A., Tesemma, Z., Pietroniro, A., & Pomeroy, J. (2024, April 14). <i>Hydrological implications of the Chile Megadrought in high mountain basins and lessons for climate adaptation</i> [Conference Presentation]. EGU General Assembly 2024, Wien, Austria. https://doi.org/10.5194/egusphere-egu24-13616</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/205225
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dc.description.abstract
La Niña years are historically associated with precipitation deficits in central Chile. However, since the onset of the so-called Chile Megadrought in 2010, the teleconnection between the El Niño-Southern Oscillation phases and the hydroclimate in central Chile has either weakened or disappeared. This study investigates the hydrological response of high mountain watersheds to La Niña (LN) and megadrought conditions (MD) in the Andes of central Chile (30°S – 35°S) through physically-based simulation of processes at the watershed scale. It is shown that during LN years, winters and summers are colder, but spring seasons are warmer, while in MD years the summers are warmer. In addition, the hydrologic response to LN and MD is distinct and amplified during MD in terms of flow deficit. Simulation results for five snow-dominated basins within the central Andes suggest lower efficiency in the transformation of precipitation to snowmelt flow (-3.7% and 1.6% with respect to the long-term average, for MD and LN, respectively), accompanied by higher evaporation (8.7% and 6.1%) and lower flow (-9.3% and -3.4%) relative to annual precipitation. Also, snow accumulation deficits at the end of winter propagate (-36.2% and -17.7%) with respect to the deficit of solid precipitation (-29.7% and -17.5%) and total precipitation (-26% and -19.3%), and during the MD the duration of snow is shorter compared to LN (-16.3 and -10.6 days). Thus, the key role played by snow processes and their variability in the hydrological response to droughts in central Chile is highlighted. The findings presented here are expected to inform ongoing discussion on adaptation strategies to climate change, as the observed climate during the megadrought (2010-?) is strikingly similar, on average, to GCM projections for this region toward the end of the 21st century.
en
dc.language.iso
en
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dc.subject
precipitation
en
dc.subject
snowmelt
en
dc.subject
La Niña
es
dc.subject
Chile
es
dc.subject
droughts
en
dc.title
Hydrological implications of the Chile Megadrought in high mountain basins and lessons for climate adaptation
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
University of Chile, Chile
-
dc.contributor.affiliation
University of Chile, Chile
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dc.contributor.affiliation
University of Chile, Chile
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dc.contributor.affiliation
University of Saskatchewan, Canada
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dc.contributor.affiliation
University of Calgary, Canada
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dc.type.category
Conference Presentation
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tuw.researchTopic.id
E5
-
tuw.researchTopic.id
E4
-
tuw.researchTopic.id
C6
-
tuw.researchTopic.name
Efficient Utilisation of Material Resources
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tuw.researchTopic.name
Environmental Monitoring and Climate Adaptation
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tuw.researchTopic.name
Modeling and Simulation
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tuw.researchTopic.value
10
-
tuw.researchTopic.value
40
-
tuw.researchTopic.value
50
-
tuw.publication.orgunit
E222-02 - Forschungsbereich Ingenieurhydrologie
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tuw.publisher.doi
10.5194/egusphere-egu24-13616
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tuw.author.orcid
0000-0002-7547-0926
-
tuw.author.orcid
0000-0001-5792-9177
-
tuw.event.name
EGU General Assembly 2024
en
tuw.event.startdate
14-04-2024
-
tuw.event.enddate
19-04-2024
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Wien
-
tuw.event.country
AT
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tuw.event.presenter
Hernandez Neira, Diego Alberto
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wb.sciencebranch
Meteorologie, Klimatologie
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wb.sciencebranch
Umwelttechnik
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wb.sciencebranch
Hydrologie
-
wb.sciencebranch.oefos
1052
-
wb.sciencebranch.oefos
2071
-
wb.sciencebranch.oefos
1053
-
wb.sciencebranch.value
30
-
wb.sciencebranch.value
20
-
wb.sciencebranch.value
50
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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item.languageiso639-1
en
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item.fulltext
no Fulltext
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item.grantfulltext
none
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item.openairetype
conference paper not in proceedings
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item.cerifentitytype
Publications
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crisitem.author.dept
University of Chile
-
crisitem.author.dept
E222-02 - Forschungsbereich Ingenieurhydrologie
-
crisitem.author.dept
University of Chile
-
crisitem.author.dept
University of Chile
-
crisitem.author.dept
University of Saskatchewan
-
crisitem.author.dept
University of Calgary
-
crisitem.author.orcid
0000-0002-7547-0926
-
crisitem.author.orcid
0000-0001-5792-9177
-
crisitem.author.parentorg
E222 - Institut für Wasserbau und Ingenieurhydrologie
