EGU2020-11276
https://doi.org/10.5194/egusphere-egu2020-11276
EGU General Assembly 2020
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Non-radiative heat dissipation across scales in a water stressed pine forest: from the leaf to the planetary boundary layer

Dan Yakir1, Jonathan Muller1, Fyodor Tatatrinov1, Mathias Mauder2, and Eyal Rotenberg1
Dan Yakir et al.
  • 1Weizmann Institute of Science, Earth & Planetary Sciences, Rehovot, Israel (dan.yakir@weizmann.ac.il)
  • 2Institute of Meteorology and Climate Research, Atmospheric Environmental Research, Garmisch-Partenkirchen, Germany

Warming, drying, and intensified water stress is expected in many ecosystems over the next century. In dry environments, evaporative cooling becomes increasingly limited and must be replaced with alternative means of heat dissipation if canopy and leaf temperature are to be maintained within the physiological range and mortality avoided. We have shown that in dry environments when latent heat flux is minimal, net radiation is high, and thermal radiation emission is suppressed, pine forest canopies can efficiently cool through a massive sensible heat flux, facilitated by the low aerodynamic resistance of the open canopy (a so-called ‘Convector Effect’). Using novel methodology, we also show that this phenomenon may originate at the leaf-scale, associated with needle properties, changes in heat transport characteristics across the canopy profile, and propagating across scales can ultimately influence the boundary layer, the local atmospheric dynamics, and potentially regional climate.

How to cite: Yakir, D., Muller, J., Tatatrinov, F., Mauder, M., and Rotenberg, E.: Non-radiative heat dissipation across scales in a water stressed pine forest: from the leaf to the planetary boundary layer, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-11276, https://doi.org/10.5194/egusphere-egu2020-11276, 2020.

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