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Why don't plants get hot under sunlight?
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Kaninefat
Why don't plants get hot under sunlight?
You mix several things.
logic: if the plant converts some of the radiation into energy rather than heat + reflection, then it's normal that it heats less than some other object with same amount of reflection.
physics: the feeling of cold/hot object is related to his thermal conductivity more than its temperature. That's why walking on wood/wool doesn't feel the same than on steel.
physics+bio: plants are mostly made of water, and thus evaporate, which cool them down. Steel doesn't.
logic: if the plant converts some of the radiation into energy rather than heat + reflection, then it's normal that it heats less than some other object with same amount of reflection.
physics: the feeling of cold/hot object is related to his thermal conductivity more than its temperature. That's why walking on wood/wool doesn't feel the same than on steel.
physics+bio: plants are mostly made of water, and thus evaporate, which cool them down. Steel doesn't.
You misunderstood the question. I acknowledge that energy has to be transformed, what i asked is what is the mechanism used to convert, and how much is converted.More
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Take a look at the Temperature paragraph from this reference:
Ecophysiology
Plants can avoid overheating by minimising the amount of sunlight absorbed and by enhancing the cooling effects of wind and transpiration.
They seem to have several ways to counter the heat as we do with transpiration, wind etc.
This article is more complicated but as really useful informations on the effects of wind on the plant's temperature:
Plants 'transpire' a lot. If you look at false-colour photographs, vegetation lights up as dark-red, and not green, because the radiate a lot of near-infrared light: heat. @SouthbobMore
You mix several things.
You mix several things.
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Take a look at the
Temperatureparagraph from this reference: EcophysiologyThey seem to have several ways to counter the heat as we do with transpiration, wind etc.
This article is more complicated but as really useful informations on the effects of wind on the plant's temperature:
Leaves in the lowest and highest winds: temperature, force and shape
Take a look at the
Temperatureparagraph from this reference:EcophysiologyThey seem to have several ways to counter the heat as we do with transpiration, wind etc.
This article is more complicated but as really useful informations on the effects of wind on the plant's temperature:
Leaves in the lowest and highest winds: temperature, force and shape
More
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