The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model
The effect of climate change is investigated on the hydro-climatology of six major Canadian rivers (Mackenzie, Yukon, Columbia, Fraser, Nelson, and St. Lawrence), in particular streamflow, by analyzing results from the historical and future simulations (RCP 4.5 and 8.5 scenarios) performed with the...
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ftcopernicus:oai:publications.copernicus.org:egusphere117651 2024-09-15T18:41:04+00:00 The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model Arora, Vivek K. Lima, Aranildo Shrestha, Rajesh 2024-02-07 application/pdf https://doi.org/10.5194/egusphere-2024-182 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-182/ eng eng doi:10.5194/egusphere-2024-182 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-182/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2024-182 2024-08-28T05:24:15Z The effect of climate change is investigated on the hydro-climatology of six major Canadian rivers (Mackenzie, Yukon, Columbia, Fraser, Nelson, and St. Lawrence), in particular streamflow, by analyzing results from the historical and future simulations (RCP 4.5 and 8.5 scenarios) performed with the Canadian regional climate model (CanRCM4). Streamflow is obtained by routing runoff using river networks at 0.5° resolution. Of these six rivers, Nelson and St. Lawrence are the most regulated. As a result, the streamflow at the mouth of these rivers shows very little seasonality. Additionally, the Great Lakes significantly dampen the seasonality of streamflow for the St. Lawrence River. Mean annual precipitation (P), evaporation (E), runoff (R), and temperature increase for all six river basins considered and the increases are higher for the more fossil fuel-intensive RCP 8.5 scenario. The only exception is the Nelson River basin for which the simulated runoff increases are extremely small. The hydrological response of these rivers to climate warming is characterized by their existing climate states. The northerly Mackenzie and Yukon River basins show a decrease in evaporation ratio (E/P) and an increase in runoff ratio (R/P) since the increase in precipitation is more than enough to offset the increase in evaporation associated with increasing temperature. For the southerly Fraser and Columbia River basins, the E/P ratio increases, and the R/P ratio decreases due to an already milder climate in the Pacific north-western region. The seasonality of simulated monthly streamflow is also more affected for the southerly Fraser and Columbia Rivers than for the northerly Mackenzie and Yukon Rivers as snow amounts decrease and snowmelt occurs earlier. The streamflow seasonality for the Mackenzie and Yukon rivers is still dominated by snowmelt at the end of the century even in the RCP 8.5 scenario. The simulated streamflow regime for the Fraser and Columbia Rivers shifts from a snow-dominated to a ... Text Yukon river Yukon Copernicus Publications: E-Journals |
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English |
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The effect of climate change is investigated on the hydro-climatology of six major Canadian rivers (Mackenzie, Yukon, Columbia, Fraser, Nelson, and St. Lawrence), in particular streamflow, by analyzing results from the historical and future simulations (RCP 4.5 and 8.5 scenarios) performed with the Canadian regional climate model (CanRCM4). Streamflow is obtained by routing runoff using river networks at 0.5° resolution. Of these six rivers, Nelson and St. Lawrence are the most regulated. As a result, the streamflow at the mouth of these rivers shows very little seasonality. Additionally, the Great Lakes significantly dampen the seasonality of streamflow for the St. Lawrence River. Mean annual precipitation (P), evaporation (E), runoff (R), and temperature increase for all six river basins considered and the increases are higher for the more fossil fuel-intensive RCP 8.5 scenario. The only exception is the Nelson River basin for which the simulated runoff increases are extremely small. The hydrological response of these rivers to climate warming is characterized by their existing climate states. The northerly Mackenzie and Yukon River basins show a decrease in evaporation ratio (E/P) and an increase in runoff ratio (R/P) since the increase in precipitation is more than enough to offset the increase in evaporation associated with increasing temperature. For the southerly Fraser and Columbia River basins, the E/P ratio increases, and the R/P ratio decreases due to an already milder climate in the Pacific north-western region. The seasonality of simulated monthly streamflow is also more affected for the southerly Fraser and Columbia Rivers than for the northerly Mackenzie and Yukon Rivers as snow amounts decrease and snowmelt occurs earlier. The streamflow seasonality for the Mackenzie and Yukon rivers is still dominated by snowmelt at the end of the century even in the RCP 8.5 scenario. The simulated streamflow regime for the Fraser and Columbia Rivers shifts from a snow-dominated to a ... |
format |
Text |
author |
Arora, Vivek K. Lima, Aranildo Shrestha, Rajesh |
spellingShingle |
Arora, Vivek K. Lima, Aranildo Shrestha, Rajesh The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model |
author_facet |
Arora, Vivek K. Lima, Aranildo Shrestha, Rajesh |
author_sort |
Arora, Vivek K. |
title |
The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model |
title_short |
The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model |
title_full |
The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model |
title_fullStr |
The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model |
title_full_unstemmed |
The effect of climate change on the simulated streamflow of six Canadian rivers based on the CanRCM4 regional climate model |
title_sort |
effect of climate change on the simulated streamflow of six canadian rivers based on the canrcm4 regional climate model |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-182 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-182/ |
genre |
Yukon river Yukon |
genre_facet |
Yukon river Yukon |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2024-182 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-182/ |
op_doi |
https://doi.org/10.5194/egusphere-2024-182 |
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1810485461676720128 |