Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products
Soil moisture (SM) is a crucial component of the hydrological cycle. Both the spatial–temporal distribution and the variation characteristics of SM are effective indicators of regional land surface water resource homogeneity and heterogeneity. With consideration of the crucial role of the Tibetan Pl...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-08-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2022.979853/full |
| _version_ | 1811340422304235520 |
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| author | Yangxiaoyue Liu Yangxiaoyue Liu Yaping Yang Yaping Yang |
| author_facet | Yangxiaoyue Liu Yangxiaoyue Liu Yaping Yang Yaping Yang |
| author_sort | Yangxiaoyue Liu |
| collection | DOAJ |
| description | Soil moisture (SM) is a crucial component of the hydrological cycle. Both the spatial–temporal distribution and the variation characteristics of SM are effective indicators of regional land surface water resource homogeneity and heterogeneity. With consideration of the crucial role of the Tibetan Plateau (TP) in the hydrological process in Asia, this study investigated the fluctuation of multi-depth soil moisture across the TP during 1950–2020 on a monthly scale against the background of global warming by using ERA5 reanalysis datasets. The correlation and potential causality between soil moisture and associated driving factors were explored. Our research revealed that the soil moisture across the TP shows a slight wetting trend at 0–100 cm depth for the past 70 years against the background of climate warming and increasing precipitation. Additionally, the wetting region (variation trend ≥ 0.005 m3/m3 per decade) had sufficient water supplementation from precipitation and a mild soil temperature increase. By comparison, there is a noteworthy warming tendency and falling precipitation in the sparsely distributed drying region (variation trend ≤ −0.005 m3/m3 per decade). In terms of vertical variation features, the temporal dynamic fluctuation of soil moisture and soil temperature evidently decreases as the depth increases, suggesting high sensitivity of the surface layer soil to atmospheric conditions. Precipitation and snowmelt preliminarily proved to be the dominant drivers causing spatial and temporal variations in soil moisture (occupying over 70% of the TP region), and bidirectional causality (ranging between 15.52% and 50.56%) was found between soil moisture and these two parameters. In summary, this study explored the spatial–temporal fluctuation in the evolutionary characteristics of SM, which is expected to advance our understanding of soil moisture dynamics under the conditions of climate change across the TP. |
| first_indexed | 2024-04-13T18:41:40Z |
| format | Article |
| id | doaj.art-68023af2425f4bf6962345b5a82de337 |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-04-13T18:41:40Z |
| publishDate | 2022-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-68023af2425f4bf6962345b5a82de3372022-12-22T02:34:42ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2022-08-011010.3389/fenvs.2022.979853979853Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis productsYangxiaoyue Liu0Yangxiaoyue Liu1Yaping Yang2Yaping Yang3State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, ChinaJiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, ChinaState Key Laboratory of Resources and Environmental Information Systems, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, ChinaJiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, ChinaSoil moisture (SM) is a crucial component of the hydrological cycle. Both the spatial–temporal distribution and the variation characteristics of SM are effective indicators of regional land surface water resource homogeneity and heterogeneity. With consideration of the crucial role of the Tibetan Plateau (TP) in the hydrological process in Asia, this study investigated the fluctuation of multi-depth soil moisture across the TP during 1950–2020 on a monthly scale against the background of global warming by using ERA5 reanalysis datasets. The correlation and potential causality between soil moisture and associated driving factors were explored. Our research revealed that the soil moisture across the TP shows a slight wetting trend at 0–100 cm depth for the past 70 years against the background of climate warming and increasing precipitation. Additionally, the wetting region (variation trend ≥ 0.005 m3/m3 per decade) had sufficient water supplementation from precipitation and a mild soil temperature increase. By comparison, there is a noteworthy warming tendency and falling precipitation in the sparsely distributed drying region (variation trend ≤ −0.005 m3/m3 per decade). In terms of vertical variation features, the temporal dynamic fluctuation of soil moisture and soil temperature evidently decreases as the depth increases, suggesting high sensitivity of the surface layer soil to atmospheric conditions. Precipitation and snowmelt preliminarily proved to be the dominant drivers causing spatial and temporal variations in soil moisture (occupying over 70% of the TP region), and bidirectional causality (ranging between 15.52% and 50.56%) was found between soil moisture and these two parameters. In summary, this study explored the spatial–temporal fluctuation in the evolutionary characteristics of SM, which is expected to advance our understanding of soil moisture dynamics under the conditions of climate change across the TP.https://www.frontiersin.org/articles/10.3389/fenvs.2022.979853/fullsoil moistureTibetan Plateauevolution characteristicsmulti-depthlong time series |
| spellingShingle | Yangxiaoyue Liu Yangxiaoyue Liu Yaping Yang Yaping Yang Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products Frontiers in Environmental Science soil moisture Tibetan Plateau evolution characteristics multi-depth long time series |
| title | Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products |
| title_full | Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products |
| title_fullStr | Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products |
| title_full_unstemmed | Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products |
| title_short | Multi-depth evolution characteristics of soil moisture over the Tibetan Plateau in the past 70 years using reanalysis products |
| title_sort | multi depth evolution characteristics of soil moisture over the tibetan plateau in the past 70 years using reanalysis products |
| topic | soil moisture Tibetan Plateau evolution characteristics multi-depth long time series |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2022.979853/full |
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