Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes
Regarded as the water towers of numerous large rivers in Asia, the Source Area of Yellow River (SAYR) on Northeast Qinghai-Tibet Plateau (QTP) contains substantial thermokarst lakes, which have exerted significant roles on the regional hydrology and water resources under permafrost degradation. To a...
Published in: | Journal of Hydrology |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | unknown |
Published: |
Digital Commons @ Michigan Tech
2021
|
Subjects: | |
Online Access: | https://digitalcommons.mtu.edu/michigantech-p/14774 https://doi.org/10.1016/j.jhydrol.2021.126314 |
id |
ftmichigantuniv:oai:digitalcommons.mtu.edu:michigantech-p-34076 |
---|---|
record_format |
openpolar |
spelling |
ftmichigantuniv:oai:digitalcommons.mtu.edu:michigantech-p-34076 2023-05-15T16:37:10+02:00 Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes Yang, Yuzhong Wu, Qingbai Liu, Fengjing Jin, Huijun 2021-06-01T07:00:00Z https://digitalcommons.mtu.edu/michigantech-p/14774 https://doi.org/10.1016/j.jhydrol.2021.126314 unknown Digital Commons @ Michigan Tech https://digitalcommons.mtu.edu/michigantech-p/14774 https://doi.org/10.1016/j.jhydrol.2021.126314 Michigan Tech Publications Ground ice Permafrost degradation Source Area of Yellow River (SAYR) Stable isotopes Thermokarst lakes Water balance College of Forest Resources and Environmental Science Forest Sciences text 2021 ftmichigantuniv https://doi.org/10.1016/j.jhydrol.2021.126314 2022-01-23T10:51:14Z Regarded as the water towers of numerous large rivers in Asia, the Source Area of Yellow River (SAYR) on Northeast Qinghai-Tibet Plateau (QTP) contains substantial thermokarst lakes, which have exerted significant roles on the regional hydrology and water resources under permafrost degradation. To address the potential impact of climate- and permafrost-induced changes in surface hydrological processes in the SAYR, the hydrological transitions and water balance of thermokarst lakes were characterized on large scales during three years using stable isotope method. Spatial and seasonal deviations in hydrological processes of thermokarst lakes were remarkable. Calculations of evaporation-to-inflow (E/I) ratios based on an isotope-mass balance model revealed substantial evaporation for all thermokarst lakes during June due to the control of climate conditions and limited input water. Substantial feeds from summer/fall rain and permafrost meltwater resulted in lower evaporation and positive water balance of lakes during July, August, September, and October. Based on the relationship between lake-specific input water isotope compositions (δ ) and annual average isotope value of precipitation (δ ), the recharge patterns of thermokarst lakes in the SAYR were classified: supra-permafrost water/rainfall-dominated lakes were mainly concentrated during June and October regardless of spatial divergences, and summer precipitation/ permafrost thaw-dominated lakes are popular during July and August. Qualitatively, seasonal diversities in the water balance of thermokarst lakes are combinatively controlled by air temperature, precipitation regimes, permafrost degradation in the SAYR. Lastly, the future hydrological trajectories of thermokarst lakes are expected under climatic warming and permafrost degradation. This study serves as an important contribution for understanding future hydrological changes and allocation of water resources on the QTP, as well as an indication of permafrost degradation under climate warming. Text Ice permafrost Thermokarst Michigan Technological University: Digital Commons @ Michigan Tech Journal of Hydrology 597 126314 |
institution |
Open Polar |
collection |
Michigan Technological University: Digital Commons @ Michigan Tech |
op_collection_id |
ftmichigantuniv |
language |
unknown |
topic |
Ground ice Permafrost degradation Source Area of Yellow River (SAYR) Stable isotopes Thermokarst lakes Water balance College of Forest Resources and Environmental Science Forest Sciences |
spellingShingle |
Ground ice Permafrost degradation Source Area of Yellow River (SAYR) Stable isotopes Thermokarst lakes Water balance College of Forest Resources and Environmental Science Forest Sciences Yang, Yuzhong Wu, Qingbai Liu, Fengjing Jin, Huijun Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes |
topic_facet |
Ground ice Permafrost degradation Source Area of Yellow River (SAYR) Stable isotopes Thermokarst lakes Water balance College of Forest Resources and Environmental Science Forest Sciences |
description |
Regarded as the water towers of numerous large rivers in Asia, the Source Area of Yellow River (SAYR) on Northeast Qinghai-Tibet Plateau (QTP) contains substantial thermokarst lakes, which have exerted significant roles on the regional hydrology and water resources under permafrost degradation. To address the potential impact of climate- and permafrost-induced changes in surface hydrological processes in the SAYR, the hydrological transitions and water balance of thermokarst lakes were characterized on large scales during three years using stable isotope method. Spatial and seasonal deviations in hydrological processes of thermokarst lakes were remarkable. Calculations of evaporation-to-inflow (E/I) ratios based on an isotope-mass balance model revealed substantial evaporation for all thermokarst lakes during June due to the control of climate conditions and limited input water. Substantial feeds from summer/fall rain and permafrost meltwater resulted in lower evaporation and positive water balance of lakes during July, August, September, and October. Based on the relationship between lake-specific input water isotope compositions (δ ) and annual average isotope value of precipitation (δ ), the recharge patterns of thermokarst lakes in the SAYR were classified: supra-permafrost water/rainfall-dominated lakes were mainly concentrated during June and October regardless of spatial divergences, and summer precipitation/ permafrost thaw-dominated lakes are popular during July and August. Qualitatively, seasonal diversities in the water balance of thermokarst lakes are combinatively controlled by air temperature, precipitation regimes, permafrost degradation in the SAYR. Lastly, the future hydrological trajectories of thermokarst lakes are expected under climatic warming and permafrost degradation. This study serves as an important contribution for understanding future hydrological changes and allocation of water resources on the QTP, as well as an indication of permafrost degradation under climate warming. |
format |
Text |
author |
Yang, Yuzhong Wu, Qingbai Liu, Fengjing Jin, Huijun |
author_facet |
Yang, Yuzhong Wu, Qingbai Liu, Fengjing Jin, Huijun |
author_sort |
Yang, Yuzhong |
title |
Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes |
title_short |
Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes |
title_full |
Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes |
title_fullStr |
Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes |
title_full_unstemmed |
Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes |
title_sort |
spatial-temporal trends of hydrological transitions in thermokarst lakes on northeast qinghai-tibet plateau based on stable isotopes |
publisher |
Digital Commons @ Michigan Tech |
publishDate |
2021 |
url |
https://digitalcommons.mtu.edu/michigantech-p/14774 https://doi.org/10.1016/j.jhydrol.2021.126314 |
genre |
Ice permafrost Thermokarst |
genre_facet |
Ice permafrost Thermokarst |
op_source |
Michigan Tech Publications |
op_relation |
https://digitalcommons.mtu.edu/michigantech-p/14774 https://doi.org/10.1016/j.jhydrol.2021.126314 |
op_doi |
https://doi.org/10.1016/j.jhydrol.2021.126314 |
container_title |
Journal of Hydrology |
container_volume |
597 |
container_start_page |
126314 |
_version_ |
1766027464526528512 |