Exploring how groundwater buffers the influence of heatwaves on vegetation function during multi-year droughts

Mu, Mengyuan; De Kauwe, Martin G.; Ukkola, Anna M.; Pitman, Andy J.; Guo, Weidong; Hobeichi, Sanaa; Briggs, Peter R.

doi:https://doi.org/10.5194/esd-12-919-2021

Articles | Volume 12, issue 3

https://doi.org/10.5194/esd-12-919-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Understanding compound weather and climate events and related...

https://doi.org/10.5194/esd-12-919-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 3

Research article

|

13 Sep 2021

Research article |

| 13 Sep 2021

Exploring how groundwater buffers the influence of heatwaves on vegetation function during multi-year droughts

Mengyuan Mu, Martin G. De Kauwe, Anna M. Ukkola, Andy J. Pitman, Weidong Guo, Sanaa Hobeichi, and Peter R. Briggs

Supplement

https://doi.org/10.5194/esd-12-919-2021-supplement

Data sets

Derived Optimal Linear Combination Evapotranspiration -- DOLCE v2.1 S. Hobeichi, G. Abramowitz, and J. P. Evans https://doi.org/10.25914/5f1664837ef06

JPL GRACE Mascon Ocean, Ice, and Hydrology Equivalent Water Height RL06 CRI Filtered Version 02 D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, and M. M. Watkins https://doi.org/10.5067/TEMSC-3JC62

MOD11A1 MODIS/Terra Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid V006 Z. Wan, S. Hook, and G. Hulley https://doi.org/10.5067/MODIS/MOD11A1.006

MYD11A1 MODIS/Aqua Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid V006 Z. Wan, S. Hook, and S. Hulley https://doi.org/10.5067/MODIS/MYD11A1.006

Model code and software

bibivking/Groundwater_Vegetation_Heatwave_Drought: Groundwater Vegetation Heatwave Drought (v1.0) M. Mu https://doi.org/10.5281/zenodo.5158498

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Short summary

Groundwater can buffer the impacts of drought and heatwaves on ecosystems, which is often neglected in model studies. Using a land surface model with groundwater, we explained how groundwater sustains transpiration and eases heat pressure on plants in heatwaves during multi-year droughts. Our results showed the groundwater’s influences diminish as drought extends and are regulated by plant physiology. We suggest neglecting groundwater in models may overstate projected future heatwave intensity.