Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China
Rapid permafrost thaw and precipitation regime shifts are altering surface and subsurface hydrological processes in arctic and subarctic watersheds. Long-term data (40 years) from two large permafrost watersheds in northeastern China, the Tahe River and Duobukuer River watersheds, indicate that wint...
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ftmdpi:oai:mdpi.com:/2073-4441/9/1/25/ 2023-08-20T04:04:36+02:00 Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China Liangliang Duan Xiuling Man Barret Kurylyk Tijiu Cai agris 2017-01-05 application/pdf https://doi.org/10.3390/w9010025 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/w9010025 https://creativecommons.org/licenses/by/4.0/ Water; Volume 9; Issue 1; Pages: 25 cold regions groundwater climate warming frozen ground hydrologic trends precipitation regimes Text 2017 ftmdpi https://doi.org/10.3390/w9010025 2023-07-31T21:01:23Z Rapid permafrost thaw and precipitation regime shifts are altering surface and subsurface hydrological processes in arctic and subarctic watersheds. Long-term data (40 years) from two large permafrost watersheds in northeastern China, the Tahe River and Duobukuer River watersheds, indicate that winter baseflows are characterized by significant positive trends of 1.7% and 2.5%·year−1, respectively. Winter baseflows exhibited statistically significant positive correlations with mean annual air temperature and the thawing index, an indicator of permafrost degradation, for both watersheds, as well as the increasing annual rainfall fraction of precipitation for the Duobukuer River watershed. Winter baseflows were characterized by a breakpoint in 1989, which lagged behind the mean annual air temperature breakpoint by only two years. The statistical analyses suggest that the increases in winter baseflow are likely related to enhanced groundwater storage and winter groundwater discharge caused by permafrost thaw and are potentially also due to an increase in the wet season rainfall. These hydrological trends are first apparent in marginal areas of permafrost distribution and are expected to shift northward towards formerly continuous permafrost regions in the context of future climate warming. Text Arctic permafrost Subarctic MDPI Open Access Publishing Arctic Water 9 1 25 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
cold regions groundwater climate warming frozen ground hydrologic trends precipitation regimes |
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cold regions groundwater climate warming frozen ground hydrologic trends precipitation regimes Liangliang Duan Xiuling Man Barret Kurylyk Tijiu Cai Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China |
topic_facet |
cold regions groundwater climate warming frozen ground hydrologic trends precipitation regimes |
description |
Rapid permafrost thaw and precipitation regime shifts are altering surface and subsurface hydrological processes in arctic and subarctic watersheds. Long-term data (40 years) from two large permafrost watersheds in northeastern China, the Tahe River and Duobukuer River watersheds, indicate that winter baseflows are characterized by significant positive trends of 1.7% and 2.5%·year−1, respectively. Winter baseflows exhibited statistically significant positive correlations with mean annual air temperature and the thawing index, an indicator of permafrost degradation, for both watersheds, as well as the increasing annual rainfall fraction of precipitation for the Duobukuer River watershed. Winter baseflows were characterized by a breakpoint in 1989, which lagged behind the mean annual air temperature breakpoint by only two years. The statistical analyses suggest that the increases in winter baseflow are likely related to enhanced groundwater storage and winter groundwater discharge caused by permafrost thaw and are potentially also due to an increase in the wet season rainfall. These hydrological trends are first apparent in marginal areas of permafrost distribution and are expected to shift northward towards formerly continuous permafrost regions in the context of future climate warming. |
format |
Text |
author |
Liangliang Duan Xiuling Man Barret Kurylyk Tijiu Cai |
author_facet |
Liangliang Duan Xiuling Man Barret Kurylyk Tijiu Cai |
author_sort |
Liangliang Duan |
title |
Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China |
title_short |
Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China |
title_full |
Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China |
title_fullStr |
Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China |
title_full_unstemmed |
Increasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China |
title_sort |
increasing winter baseflow in response to permafrost thaw and precipitation regime shifts in northeastern china |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2017 |
url |
https://doi.org/10.3390/w9010025 |
op_coverage |
agris |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Subarctic |
genre_facet |
Arctic permafrost Subarctic |
op_source |
Water; Volume 9; Issue 1; Pages: 25 |
op_relation |
https://dx.doi.org/10.3390/w9010025 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w9010025 |
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Water |
container_volume |
9 |
container_issue |
1 |
container_start_page |
25 |
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1774714987511545856 |