Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes
Both lateral surface and subsurface water flow affect soil moisture dynamics, yet most land surface models only solve subsurface water movement vertically. Here, we use a 3D ecosystem model that considers both land surface and subsurface hydrologic processes to simulate soil moisture, which is then...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/adaa05 |
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| author | Xiangyu Liu Qianlai Zhuang Chang Liao M Torre Jorgenson |
| author_facet | Xiangyu Liu Qianlai Zhuang Chang Liao M Torre Jorgenson |
| author_sort | Xiangyu Liu |
| collection | DOAJ |
| description | Both lateral surface and subsurface water flow affect soil moisture dynamics, yet most land surface models only solve subsurface water movement vertically. Here, we use a 3D ecosystem model that considers both land surface and subsurface hydrologic processes to simulate soil moisture, which is then used to drive a 1-D vertical soil thermal model to simulate the soil moisture effects on soil thermal dynamics in central Alaska. Our coupled model improves soil temperature (ST) estimates by 43.5% in comparison with observational data. Soil moisture has little effect on ST during the wet season (−1.5%) and a substantial influence during the dry season (60%). Spatially, water lateral flow has significant impacts on both soil moisture and ST, causing model estimates for thawed areas in the transition season to increase by ∼10% in the study area. Our results highlight the importance of considering dynamical soil moisture, as well as lateral flow effects, on soil thermal dynamics in permafrost regions. |
| format | Article |
| id | doaj-art-57216a9cfc4343fd88347f1ac80035e6 |
| institution | Kabale University |
| issn | 1748-9326 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj-art-57216a9cfc4343fd88347f1ac80035e62025-02-04T08:49:57ZengIOP PublishingEnvironmental Research Letters1748-93262025-01-0120202405610.1088/1748-9326/adaa05Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapesXiangyu Liu0https://orcid.org/0000-0003-4676-6362Qianlai Zhuang1Chang Liao2https://orcid.org/0000-0002-7348-8858M Torre Jorgenson3Department of Earth, Atmospheric, Planetary Sciences, Purdue University , West Lafayette, IN, United States of AmericaDepartment of Earth, Atmospheric, Planetary Sciences, Purdue University , West Lafayette, IN, United States of America; Department of Agronomy, Purdue University , West Lafayette, IN, United States of America; Purdue Climate Change Research Center , West Lafayette, IN, United States of AmericaAtmospheric, Climate, and Earth Sciences, Pacific Northwest National Laboratory , Richland, WA, United States of AmericaAlaska Ecoscience , Fairbanks, AK, United States of AmericaBoth lateral surface and subsurface water flow affect soil moisture dynamics, yet most land surface models only solve subsurface water movement vertically. Here, we use a 3D ecosystem model that considers both land surface and subsurface hydrologic processes to simulate soil moisture, which is then used to drive a 1-D vertical soil thermal model to simulate the soil moisture effects on soil thermal dynamics in central Alaska. Our coupled model improves soil temperature (ST) estimates by 43.5% in comparison with observational data. Soil moisture has little effect on ST during the wet season (−1.5%) and a substantial influence during the dry season (60%). Spatially, water lateral flow has significant impacts on both soil moisture and ST, causing model estimates for thawed areas in the transition season to increase by ∼10% in the study area. Our results highlight the importance of considering dynamical soil moisture, as well as lateral flow effects, on soil thermal dynamics in permafrost regions.https://doi.org/10.1088/1748-9326/adaa05soil temperaturesoil water contentlateral flowland surface modeling |
| spellingShingle | Xiangyu Liu Qianlai Zhuang Chang Liao M Torre Jorgenson Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes Environmental Research Letters soil temperature soil water content lateral flow land surface modeling |
| title | Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes |
| title_full | Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes |
| title_fullStr | Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes |
| title_full_unstemmed | Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes |
| title_short | Changes in soil water content and lateral flow exert large effects on soil thermal dynamics across Alaskan landscapes |
| title_sort | changes in soil water content and lateral flow exert large effects on soil thermal dynamics across alaskan landscapes |
| topic | soil temperature soil water content lateral flow land surface modeling |
| url | https://doi.org/10.1088/1748-9326/adaa05 |
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