If you’re interested in this, the thing you want to look up is “plant transpiration” and “how do stomata work”. It’s very interesting and explains a lot about how plants work in general.
I don't remember weather reports ever including anything about W/m²...I'm not arguing that point, just saying I don't remember, which I should, because that would be after 1975 when metrification happened in Canada, but I digress... I do remember the inclusion of Windchill makes it feel like -X° not ekactly when, but that it had my mother in a tizzy for years (Specally because I always walked to school, and I was a winter camper...) So... I started High School in 77 and moved out in 83. I must have been in that time period, I think, in Ottawa at least...I do know for a fact that "Windchill makes it feel like -X°" was in use in 1994, because that was a deciding factor in whether we were offering Horse drawn sleigh rides, again, in Ottawa at least. To the best of my memory...
Oh, good point. From what I’ve read, *Environment Canada* reported it in W/m2 back then, but I’m not sure how the news / weather report actually communicated it at the time. I was old enough to be paying attention back then, for it was long enough ago that I can’t remember.
I wonder if we could trigger another follow-up by asking more questions :) Sorry, didn't have much meaningful to say, but you doing a follow-up deserves a comment for the youtube-alghoritm-gods to pick up on :)
You’re right about “wind chill temp” but some of these base assumptions/statements are just flat wrong. Evaporative cooling isn’t some side topic here it’s exactly what you’re talking about. Your example with the tea in particular is a perfect example that shows you’re just factually incorrect. In a room with no wind, the liquid will cool to room temperature but if you add wind or a lot of air movement it WILL cool to lower than room temperature because of evaporative cooling. It’s not a small amount either. Any axolotyl keeper can tell you that keeping their tank open with a fan on it is normally enough to lower the temperature by 3-10 degrees. It’s the same way we cool our bodies via sweating. It’s a significant amount. An article about plant transpiration said this - “Wind - often causes [stomata] closure because it: (a) brings CO2 enriched air; and (b) increases the rate of transpiration that causes water stress which causes the stomata to close. In some cases, wind causes stomatal opening to increase transpiration for cooling.” The wind/wind chill 100% does affect the temperature and productivity of plants. Now plants are not equal to an open cup of water, their evaporation is tightly controlled by stomata, so they’re not going to lower their temperature by quite as much but to protect from dropping temps and evaporation caused by wind they’re going to have to stop photosynthesizing which is the same reaction they would have if the temperature was in fact colder. It’s not going to lower them exactly to the “wind chill” temperature they say on the weather channel but it is going to make them colder/less productive than the air would without wind. I get that your basic point is correct, but you’re also just saying things that are flat wrong.
Hey Bloodyfeather. I hope to make a video about the other effects that wind has on plants (including evaporative cooling, increased transpiration, etc), but *wind* and *windchill* are separate things. This video is about the windchill value that is listed in the weather forecast, and that value isn't directly relevant to plants. All I'm trying to explain is that when looking at the forecast, it's the actual temperature that we should be paying attention to. In fact, I would argue that (based on your comments) it could also be important to look at the wind speed. But *windchill* is still only relevant to warm blooded animals.
If it's the people who keep it on all season, it's to avoid moisture loss and wind breakage. One can also throw it on quickly to mitigate sudden temperature drops below the plant's minimum temperature (you can use plastic too, TBH). Usually those frost events are short lived in the morning and the burlap acts as a secondary boundary layer. Heat loss would have to work through the interstitial air layer to the burlap and then to it's boundary air layer. Wind will strip that outer boundary layer, but you get a persistent R-value from that air gap inside - buying you time for the sun to come out.
You are still missing a point.. wind leads to evaporation and evaporation leads to cooling. So wind will actually help lower the temperature below ambient temperature. That's why you can see frost without freezing temperatures. And you did mention evaporative cooling so I don't know why you say only temperature matters.
Hey Salu, thanks for the comment. I briefly mentioned evaporative cooling in both videos. For example, please see 7:22 in this one. Wind *does* influence evaporative cooling, but that’s still a different thing from the windchill value.
@@BackToReality i know you mention, but although the video is about windchill you say that only temperature matters for the final temperature and that is not true, a rock will be at ambient temperature but a plant wont. So that sentence was wrong, might be true that windchill will only accelerate temperature change but the main factor for "wind"chill actually has evaporative cooling properties we should mention that instead of treating plants as if they are rocks x) hope i poked you enough to make an evaporative cooling video as follow up, the videos are great its just that specific sentence that seems wrong if you consider the whole picture
Yes, would be interested in know about the other topics, greatly appreciated for all videos you make 👍
Great follow-up 👍. Thanks I appreciate all the work that goes into your videos.
Really appreciating the fact that you took the time to make a follow-up video to address questions
Sure, I'd like to know more about the evaporative effects
All chill matter.
Not just wind chill.
Racist
can I achieve additional chill hours through evaporative cooling ? I was thinking water sprinklers during the dry windy days of the winter
O man you are a patient human. Respect from Africa 🇿🇦
I would be interested in a video about evaporation cooling. Does high humidity help keep plants watered in high heat?
If you’re interested in this, the thing you want to look up is “plant transpiration” and “how do stomata work”. It’s very interesting and explains a lot about how plants work in general.
But what if my tea DOES get colder than ambient temperature? Who do I call to share this with? A ghost hunter or someone on the Nobel committee?
I don't remember weather reports ever including anything about W/m²...I'm not arguing that point, just saying I don't remember, which I should, because that would be after 1975 when metrification happened in Canada, but I digress... I do remember the inclusion of Windchill makes it feel like -X° not ekactly when, but that it had my mother in a tizzy for years (Specally because I always walked to school, and I was a winter camper...) So... I started High School in 77 and moved out in 83. I must have been in that time period, I think, in Ottawa at least...I do know for a fact that "Windchill makes it feel like -X°" was in use in 1994, because that was a deciding factor in whether we were offering Horse drawn sleigh rides, again, in Ottawa at least. To the best of my memory...
Oh, good point. From what I’ve read, *Environment Canada* reported it in W/m2 back then, but I’m not sure how the news / weather report actually communicated it at the time. I was old enough to be paying attention back then, for it was long enough ago that I can’t remember.
A truly sublime video, thanks very much for all your effort.
I wonder if we could trigger another follow-up by asking more questions :)
Sorry, didn't have much meaningful to say, but you doing a follow-up deserves a comment for the youtube-alghoritm-gods to pick up on :)
You’re right about “wind chill temp” but some of these base assumptions/statements are just flat wrong. Evaporative cooling isn’t some side topic here it’s exactly what you’re talking about. Your example with the tea in particular is a perfect example that shows you’re just factually incorrect. In a room with no wind, the liquid will cool to room temperature but if you add wind or a lot of air movement it WILL cool to lower than room temperature because of evaporative cooling. It’s not a small amount either. Any axolotyl keeper can tell you that keeping their tank open with a fan on it is normally enough to lower the temperature by 3-10 degrees. It’s the same way we cool our bodies via sweating. It’s a significant amount. An article about plant transpiration said this - “Wind - often causes [stomata] closure because it: (a) brings CO2 enriched air; and (b) increases the rate of transpiration that causes water stress which causes the stomata to close. In some cases, wind causes stomatal opening to increase transpiration for cooling.” The wind/wind chill 100% does affect the temperature and productivity of plants. Now plants are not equal to an open cup of water, their evaporation is tightly controlled by stomata, so they’re not going to lower their temperature by quite as much but to protect from dropping temps and evaporation caused by wind they’re going to have to stop photosynthesizing which is the same reaction they would have if the temperature was in fact colder. It’s not going to lower them exactly to the “wind chill” temperature they say on the weather channel but it is going to make them colder/less productive than the air would without wind. I get that your basic point is correct, but you’re also just saying things that are flat wrong.
Hey Bloodyfeather. I hope to make a video about the other effects that wind has on plants (including evaporative cooling, increased transpiration, etc), but *wind* and *windchill* are separate things. This video is about the windchill value that is listed in the weather forecast, and that value isn't directly relevant to plants. All I'm trying to explain is that when looking at the forecast, it's the actual temperature that we should be paying attention to. In fact, I would argue that (based on your comments) it could also be important to look at the wind speed. But *windchill* is still only relevant to warm blooded animals.
Also let us know what you upto and how are you?? ✌
Ok guys -- its been way too long! Good to see you again
Thank you for the explanation!
Why isnt this channel bigger ????
Why do some people wrap plants in burlap? I thought it was to protect against windchill.
Thanks for the follow up video!
If it's the people who keep it on all season, it's to avoid moisture loss and wind breakage. One can also throw it on quickly to mitigate sudden temperature drops below the plant's minimum temperature (you can use plastic too, TBH). Usually those frost events are short lived in the morning and the burlap acts as a secondary boundary layer. Heat loss would have to work through the interstitial air layer to the burlap and then to it's boundary air layer. Wind will strip that outer boundary layer, but you get a persistent R-value from that air gap inside - buying you time for the sun to come out.
To prevent infrared heat losses to space when sky is clear at night.
Very good. I always wondered about that. Now, all questions answered. Thanks.
Just like MetallicA sings: and no windchill matters.
Great topic. Please do video about heat losses when sky is clear at night. Thats why we wrap plants.
Surface is much colder than air.
Nicely done and explained.
Good to know. thanks.
You are still missing a point.. wind leads to evaporation and evaporation leads to cooling. So wind will actually help lower the temperature below ambient temperature. That's why you can see frost without freezing temperatures. And you did mention evaporative cooling so I don't know why you say only temperature matters.
Hey Salu, thanks for the comment. I briefly mentioned evaporative cooling in both videos. For example, please see 7:22 in this one. Wind *does* influence evaporative cooling, but that’s still a different thing from the windchill value.
@@BackToReality i know you mention, but although the video is about windchill you say that only temperature matters for the final temperature and that is not true, a rock will be at ambient temperature but a plant wont. So that sentence was wrong, might be true that windchill will only accelerate temperature change but the main factor for "wind"chill actually has evaporative cooling properties we should mention that instead of treating plants as if they are rocks x) hope i poked you enough to make an evaporative cooling video as follow up, the videos are great its just that specific sentence that seems wrong if you consider the whole picture