Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability
Abstract Understanding tree transpiration variability is vital for assessing ecosystem water‐use efficiency and forest health amid climate change, yet most landscape‐level measurements do not differentiate individual trees. Using canopy temperature data from thermal cameras, we estimated the transpi...
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| Format: | Article |
| Language: | English |
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Wiley
2024-10-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL111479 |
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| author | Mostafa Javadian Donald M. Aubrecht Joshua B. Fisher Russell L. Scott Sean P. Burns Jen L. Diehl J. William Munger Andrew D. Richardson |
| author_facet | Mostafa Javadian Donald M. Aubrecht Joshua B. Fisher Russell L. Scott Sean P. Burns Jen L. Diehl J. William Munger Andrew D. Richardson |
| author_sort | Mostafa Javadian |
| collection | DOAJ |
| description | Abstract Understanding tree transpiration variability is vital for assessing ecosystem water‐use efficiency and forest health amid climate change, yet most landscape‐level measurements do not differentiate individual trees. Using canopy temperature data from thermal cameras, we estimated the transpiration rates of individual trees at Harvard Forest and Niwot Ridge. PT‐JPL model was used to derive latent heat flux from thermal images at the canopy‐level, showing strong agreement with tower measurements (R2 = 0.70–0.96 at Niwot, 0.59–0.78 at Harvard at half‐hourly to monthly scales) and daily RMSE of 33.5 W/m2 (Niwot) and 52.8 W/m2 (Harvard). Tree‐level analysis revealed species‐specific responses to drought, with lodgepole pine exhibiting greater tolerance than Engelmann spruce at Niwot and red oak showing heightened resistance than red maple at Harvard. These findings show how ecophysiological differences between species result in varying responses to drought and demonstrate that these responses can be characterized by deriving transpiration from crown temperature measurements. |
| format | Article |
| id | doaj-art-b45b654b5a6748e7b7f29d4f52b0ada6 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b45b654b5a6748e7b7f29d4f52b0ada62024-11-11T10:10:52ZengWileyGeophysical Research Letters0094-82761944-80072024-10-015120n/an/a10.1029/2024GL111479Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought VulnerabilityMostafa Javadian0Donald M. Aubrecht1Joshua B. Fisher2Russell L. Scott3Sean P. Burns4Jen L. Diehl5J. William Munger6Andrew D. Richardson7Center for Ecosystem Science and Society (ECOSS) Northern Arizona University Flagstaff AZ USAIndependent Researcher Flagstaff AZ USASchmid College of Science and Technology Chapman University Orange CA USASouthwest Watershed Research Center USDA Agricultural Research Service Tucson AZ USADepartment of Geography University of Colorado Boulder Boulder CO USACenter for Ecosystem Science and Society (ECOSS) Northern Arizona University Flagstaff AZ USASchool of Engineering and Applied Sciences Harvard University Cambridge MA USACenter for Ecosystem Science and Society (ECOSS) Northern Arizona University Flagstaff AZ USAAbstract Understanding tree transpiration variability is vital for assessing ecosystem water‐use efficiency and forest health amid climate change, yet most landscape‐level measurements do not differentiate individual trees. Using canopy temperature data from thermal cameras, we estimated the transpiration rates of individual trees at Harvard Forest and Niwot Ridge. PT‐JPL model was used to derive latent heat flux from thermal images at the canopy‐level, showing strong agreement with tower measurements (R2 = 0.70–0.96 at Niwot, 0.59–0.78 at Harvard at half‐hourly to monthly scales) and daily RMSE of 33.5 W/m2 (Niwot) and 52.8 W/m2 (Harvard). Tree‐level analysis revealed species‐specific responses to drought, with lodgepole pine exhibiting greater tolerance than Engelmann spruce at Niwot and red oak showing heightened resistance than red maple at Harvard. These findings show how ecophysiological differences between species result in varying responses to drought and demonstrate that these responses can be characterized by deriving transpiration from crown temperature measurements.https://doi.org/10.1029/2024GL111479thermal cameracanopy temperaturetranspirationindividual treePT‐JPLdrought |
| spellingShingle | Mostafa Javadian Donald M. Aubrecht Joshua B. Fisher Russell L. Scott Sean P. Burns Jen L. Diehl J. William Munger Andrew D. Richardson Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability Geophysical Research Letters thermal camera canopy temperature transpiration individual tree PT‐JPL drought |
| title | Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability |
| title_full | Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability |
| title_fullStr | Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability |
| title_full_unstemmed | Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability |
| title_short | Scaling Individual Tree Transpiration With Thermal Cameras Reveals Interspecies Differences to Drought Vulnerability |
| title_sort | scaling individual tree transpiration with thermal cameras reveals interspecies differences to drought vulnerability |
| topic | thermal camera canopy temperature transpiration individual tree PT‐JPL drought |
| url | https://doi.org/10.1029/2024GL111479 |
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