Dynamics of canopy stomatal conductance, transpiration, and evaporation in a temperate deciduous forest, validated by carbonyl sulfide uptake

Wehr, Richard; Commane, Róisín; Munger, J. William; McManus, J. Barry; Nelson, David D.; Zahniser, Mark S.; Saleska, Scott R.; Wofsy, Steven C.

doi:https://doi.org/10.5194/bg-14-389-2017

Articles | Volume 14, issue 2

https://doi.org/10.5194/bg-14-389-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/bg-14-389-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 14, issue 2

Research article

|

26 Jan 2017

Research article |

| 26 Jan 2017

Dynamics of canopy stomatal conductance, transpiration, and evaporation in a temperate deciduous forest, validated by carbonyl sulfide uptake

Richard Wehr, Róisín Commane, J. William Munger, J. Barry McManus, David D. Nelson, Mark S. Zahniser, Scott R. Saleska, and Steven C. Wofsy

Data sets

Fluxes of Carbonyl Sulfide at Harvard Forest EMS Tower since 2010 Roisin Commane, Steven Wofsy, and Richard Wehr https://doi.org/10.6073/pasta/7ed7b4d1fc7ad303998e76143a3b279a

Isotopic Composition of Net Ecosystem CO2 Exchange at Harvard Forest EMS Tower since 2011 Scott Saleska and Richard Wehr https://doi.org/10.6073/pasta/5fe62484b4c21944faed327d42704d7b

Canopy-Atmosphere Exchange of Carbon, Water and Energy at Harvard Forest EMS Tower since 1991 W. Munger and S. Wofsy https://doi.org/10.6073/pasta/1580a910a8a1a154cb59c941b252613a

Short summary

Leaf stomata influence both photosynthesis and transpiration, coupling the carbon and water cycles, but there is no direct method for estimating stomatal behavior on the ecosystem scale. We use the ecosystem–atmosphere exchange of water, heat, and carbonyl sulfide to estimate canopy-integrated stomatal conductance by two independent methods. We then use that conductance to show that the seasonal dynamics of transpiration and evaporation are different than represented in current biosphere models.