Concurrent Changes in Extreme Hydroclimate Events in the Colorado River Basin
Abstract
Extreme events resulting in catastrophic damage have more than doubled in the last five years, costing hundreds of lives and thousands of homes, and heavily undermining regional economic stability. At present, most of these hydroclimatic extreme events are documented by the media as individual events; however, in scientific terms, many are better understood as concurrent events—concurrent extremes of both temperature and precipitation (e.g., drought, floods). This paper considers concurrent changes in hydroclimate extremes, including heatwaves, drought, flooding, and low flows, in six historical-to-future (1970–1999, 2070–2099) Earth System Model (ESM) climate scenarios for the Colorado River basin. Results indicate that temperature-driven Impacts (heatwaves, drought) have the strongest responses while precipitation-driven Impacts have weaker responses. All Impacts exhibit an increase in magnitude from synoptic to annual time scales, with heatwaves increasing in strength about three times at the annual time scale versus the synoptic, while low flows only increase slightly. Critical watersheds in the Colorado were identified, highlighting the Blue River basin, Uncompahgre, East Taylor, Salt/Verde watersheds, locations of important water infrastructures, water resources, and hydrological research. Our results indicate that concurrent extreme hydroclimate events are projected to increase in the future and intensify within critical regions of the Colorado River basin.more »
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1773565
- Alternate Identifier(s):
- OSTI ID: 1804352
- Report Number(s):
- LA-UR-20-27647
Journal ID: ISSN 2073-4441; WATEGH; PII: w13070978
- Grant/Contract Number:
- 20180621ECR; 89233218CNA000001
- Resource Type:
- Published Article
- Journal Name:
- Water (Basel)
- Additional Journal Information:
- Journal Name: Water (Basel) Journal Volume: 13 Journal Issue: 7; Journal ID: ISSN 2073-4441
- Publisher:
- MDPI AG
- Country of Publication:
- Switzerland
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; Earth Sciences; Extreme events; joint; Colorado River Basin; flooding; drought; low flows; heatwaves; hydrology; concurrent; climate change
Citation Formats
Bennett, Katrina E., Talsma, Carl, and Boero, Riccardo. Concurrent Changes in Extreme Hydroclimate Events in the Colorado River Basin. Switzerland: N. p., 2021.
Web. doi:10.3390/w13070978.
Bennett, Katrina E., Talsma, Carl, & Boero, Riccardo. Concurrent Changes in Extreme Hydroclimate Events in the Colorado River Basin. Switzerland. https://doi.org/10.3390/w13070978
Bennett, Katrina E., Talsma, Carl, and Boero, Riccardo. Thu .
"Concurrent Changes in Extreme Hydroclimate Events in the Colorado River Basin". Switzerland. https://doi.org/10.3390/w13070978.
@article{osti_1773565,
title = {Concurrent Changes in Extreme Hydroclimate Events in the Colorado River Basin},
author = {Bennett, Katrina E. and Talsma, Carl and Boero, Riccardo},
abstractNote = {Extreme events resulting in catastrophic damage have more than doubled in the last five years, costing hundreds of lives and thousands of homes, and heavily undermining regional economic stability. At present, most of these hydroclimatic extreme events are documented by the media as individual events; however, in scientific terms, many are better understood as concurrent events—concurrent extremes of both temperature and precipitation (e.g., drought, floods). This paper considers concurrent changes in hydroclimate extremes, including heatwaves, drought, flooding, and low flows, in six historical-to-future (1970–1999, 2070–2099) Earth System Model (ESM) climate scenarios for the Colorado River basin. Results indicate that temperature-driven Impacts (heatwaves, drought) have the strongest responses while precipitation-driven Impacts have weaker responses. All Impacts exhibit an increase in magnitude from synoptic to annual time scales, with heatwaves increasing in strength about three times at the annual time scale versus the synoptic, while low flows only increase slightly. Critical watersheds in the Colorado were identified, highlighting the Blue River basin, Uncompahgre, East Taylor, Salt/Verde watersheds, locations of important water infrastructures, water resources, and hydrological research. Our results indicate that concurrent extreme hydroclimate events are projected to increase in the future and intensify within critical regions of the Colorado River basin. Considering extreme hydroclimate events concurrently is an important step towards linking economic and social effects of these events and their associated instabilities on a regional scale.},
doi = {10.3390/w13070978},
journal = {Water (Basel)},
number = 7,
volume = 13,
place = {Switzerland},
year = {Thu Apr 01 00:00:00 EDT 2021},
month = {Thu Apr 01 00:00:00 EDT 2021}
}
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