Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau
Soil moisture governs vegetation growth and distribution, which in turn affects its dynamics through transpiration, interception, root water uptake, and soil structure improvement. Understanding these interactions is vital for effective ecosystem management and sustainable development. This study an...
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| Format: | Article |
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Taylor & Francis Group
2025-08-01
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| Series: | International Journal of Digital Earth |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/17538947.2025.2532774 |
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| _version_ | 1849224327152533504 |
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| author | Shubo Zhang Siqin Tong Jinyuan Ren Gang Bao Xiaojun Huang Yuhai Bao Dorjsuren Altantuya |
| author_facet | Shubo Zhang Siqin Tong Jinyuan Ren Gang Bao Xiaojun Huang Yuhai Bao Dorjsuren Altantuya |
| author_sort | Shubo Zhang |
| collection | DOAJ |
| description | Soil moisture governs vegetation growth and distribution, which in turn affects its dynamics through transpiration, interception, root water uptake, and soil structure improvement. Understanding these interactions is vital for effective ecosystem management and sustainable development. This study analyzes the interactions and lag effects between soil moisture at different depths and NDVI on the Mongolian Plateau from 1982–2022 using trend, correlation, and nonlinear Granger causality analyses. The results show that the significant increase in vegetation is accompanied by a notable decrease in soil moisture. Increased vegetation promotes shallow soil moisture retention but accelerates deep soil moisture depletion as drought intensifies, extending the lag time. Concurrently, while soil moisture generally positively affects NDVI, this relationship becomes negatively correlated in deeper layers. Overall, soil moisture had a causal relationship with NDVI in 65.7 to 76.9% of the areas, indicating broad influence by soil moisture. Conversely, vegetation exerted a regulatory effect on soil moisture in 38.9to 66.5% of the regions. As depth increased, bidirectional causality gradually weakened, transitioning to a unidirectional influence of soil moisture on NDVI. In arid regions, NDVI more significantly impacted deep soil moisture, highlighting the need for increased focus on vegetation's effect on water consumption. |
| format | Article |
| id | doaj-art-d99e98d73b3c4af3a5ecb86f902a4f39 |
| institution | Kabale University |
| issn | 1753-8947 1753-8955 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | International Journal of Digital Earth |
| spelling | doaj-art-d99e98d73b3c4af3a5ecb86f902a4f392025-08-25T11:28:50ZengTaylor & Francis GroupInternational Journal of Digital Earth1753-89471753-89552025-08-0118110.1080/17538947.2025.2532774Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian PlateauShubo Zhang0Siqin Tong1Jinyuan Ren2Gang Bao3Xiaojun Huang4Yuhai Bao5Dorjsuren Altantuya6College of Geographical Science, Inner Mongolia Normal University, Hohhot, People’s Republic of ChinaCollege of Geographical Science, Inner Mongolia Normal University, Hohhot, People’s Republic of ChinaCollege of Geographical Science, Inner Mongolia Normal University, Hohhot, People’s Republic of ChinaCollege of Geographical Science, Inner Mongolia Normal University, Hohhot, People’s Republic of ChinaCollege of Geographical Science, Inner Mongolia Normal University, Hohhot, People’s Republic of ChinaCollege of Geographical Science, Inner Mongolia Normal University, Hohhot, People’s Republic of ChinaMongolian Academy of Sciences, Institute of Geography and Geoecology, Ulaanbaatar, MongoliaSoil moisture governs vegetation growth and distribution, which in turn affects its dynamics through transpiration, interception, root water uptake, and soil structure improvement. Understanding these interactions is vital for effective ecosystem management and sustainable development. This study analyzes the interactions and lag effects between soil moisture at different depths and NDVI on the Mongolian Plateau from 1982–2022 using trend, correlation, and nonlinear Granger causality analyses. The results show that the significant increase in vegetation is accompanied by a notable decrease in soil moisture. Increased vegetation promotes shallow soil moisture retention but accelerates deep soil moisture depletion as drought intensifies, extending the lag time. Concurrently, while soil moisture generally positively affects NDVI, this relationship becomes negatively correlated in deeper layers. Overall, soil moisture had a causal relationship with NDVI in 65.7 to 76.9% of the areas, indicating broad influence by soil moisture. Conversely, vegetation exerted a regulatory effect on soil moisture in 38.9to 66.5% of the regions. As depth increased, bidirectional causality gradually weakened, transitioning to a unidirectional influence of soil moisture on NDVI. In arid regions, NDVI more significantly impacted deep soil moisture, highlighting the need for increased focus on vegetation's effect on water consumption.https://www.tandfonline.com/doi/10.1080/17538947.2025.2532774Vegetationsoil moisturegranger causalitytime-lag effectsnon-linear interactions |
| spellingShingle | Shubo Zhang Siqin Tong Jinyuan Ren Gang Bao Xiaojun Huang Yuhai Bao Dorjsuren Altantuya Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau International Journal of Digital Earth Vegetation soil moisture granger causality time-lag effects non-linear interactions |
| title | Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau |
| title_full | Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau |
| title_fullStr | Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau |
| title_full_unstemmed | Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau |
| title_short | Bilateral coupling relationships between vegetation NDVI and multi-depth soil moisture in the Mongolian Plateau |
| title_sort | bilateral coupling relationships between vegetation ndvi and multi depth soil moisture in the mongolian plateau |
| topic | Vegetation soil moisture granger causality time-lag effects non-linear interactions |
| url | https://www.tandfonline.com/doi/10.1080/17538947.2025.2532774 |
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