I’m consistently impressed by how well you can explain complex topics clearly in such short time

@MarkHatlestad

Жыл бұрын

Well, he’s had over 14 years to practice!

@ravineshsingh3033

Жыл бұрын

go see crash course

@Calvero52

Жыл бұрын

Totally agree! I just rewatched his video he did years ago back when the Webb telescope was launched (I think) and he was explaining how we look back in the past with the space photography. That's Hank's superpower 💪

@stemiros

Жыл бұрын

+

@jesus05uk

Жыл бұрын

I totally agree. I hadn’t appreciated in such simple terms why these gasses would cause heating. What a brilliant skill to capitulate something so accessibly.

One important missing bit here: The solid bits of Earth absorb the visible light, and heat up (why it warms way up during the day). They then radiate that heat out in the IR (why everything cools down at night), which is absorbed by the carbon dioxide, methane, water vapor in the air instead of escaping out to space. That's where the more energy in than out comes from. The Earth is wearing a blanket, and we keep adding more and more blankets.

@vlogbrothers

Жыл бұрын

I felt like, despite the fact that that is among the most important mechanisms of climate change, it would be confusing. People don't think of the earth as emitting light, so I'd have to get into that.

@shortourt14

Жыл бұрын

So I think I understand but correct me if I'm wrong. Is this why, on a really hot (& especially dry) day, you can often feel *more* heat coming from the ground than hitting you on the top of the head?

@hankdmoose

Жыл бұрын

​@@vlogbrothers That's fair. 4 minutes is a very short time for a radiative transfer lecture :) Maybe "could JWST see the earth?" would be a cool future topic, looking at the wavelengths JWST can see vs. those emitted by the earth. If not for VlogBrothers, then maybe SciShow Space?

@infamedepatates2502

Жыл бұрын

Black body radiation, right?

@hankdmoose

Жыл бұрын

@@shortourt14 yes, that's exactly it! When you feel heat coming off of something, you're sensing the infrared radiation. There's a lot less atmosphere between you and a parking lot than between you and space. A lot of the IR from the sun gets absorbed or scattered before it gets to you, but you're basically feeling every bit of IR coming off the parking lot. I just did a quick experiment and pointed an IR thermometer at my patio and then at the bluest patch of sky I could find. The thermometer can tell the temp by the intensity of infrared it can see. My patio is sitting at 106°F (41°C). The air temp is 79°F (26°C). The sky reads 8°F (-13°C). So there's a lot less infrared (heat) coming from above you than from below. The whole reason the sun feels hot is the absorption Hank mentioned in his video. Unfortunately I can't get a reading pointed at the sun itself because it's too cloudy today. If I get one though I'll add another comment.

It happens in 4 minutes? That's scary

@SylviaRustyFae

Жыл бұрын

Thats what i was comin to say xD No wonder its such a big problem

@vanessapierson4913

Жыл бұрын

and this is why we comma

@vigilantcosmicpenguin8721

Жыл бұрын

I think it takes a bit longer than that, Hank.

@richardmercer2337

Жыл бұрын

The good news is it only takes 10 minutes to change it back again....🙃

Great explanation! Sometimes I think the four minute limit is too restrictive, but it can help make really concise, informative videos.

@BFedie518

Жыл бұрын

This video for sure counts as educational and is exempt from the time limit.

@vlogbrothers

Жыл бұрын

That's the plan!

@morganburt2565

Жыл бұрын

@@BFedie518 i think it’s super useful to have these short explanations, like u could send this to someone and they’d be more likely to watch the whole thing

@cogspace

Жыл бұрын

The shorter the video, the greater the chance people will watch to the end.

@rparl

Жыл бұрын

I tend to avoid very long videos.

If only, scientifically literate people agreeing something exists was enough for something to politically _exist._

@spacey-sam

Жыл бұрын

+

@biocapsule7311

Жыл бұрын

Or even if they consent to agree that it exist, stop pretending that it can be solve by individual efforts instead of a collective one.

@Billchu13

Жыл бұрын

We need a pro-science party in the US with a reasonable climate policy.

@DES.REVER.DESIGNS

Жыл бұрын

@@Billchu13 Andrew Yang is starting a 3rd party... they will be announcing the other people in the group at the end of this week (or next week not entirely sure) Its gonna be a pro-science party and will be announcing their platform at the same time as they qnouce the other candidates and famous people who are part of the party. It's called the "forward party" their jingle is "not left or right, we need to move forward"

@cikeZ00

Жыл бұрын

Most of the time whatever it is that exists goes directly against capitalism. Profit seeking. At all costs. "I'm getting all this money from huge oil companies, my life is great. Why should I care about an issue that will make me loose money but gain nothing out of" - is what the usual case is for people in power in this system we all live in.

"absorb, reflect, or let pass through/ that's basically the only three things material can do" please include this in a new science-y song. it just flows so well

@Catesrus21

Жыл бұрын

Came here to say the same thing 😂

@Catesrus21

Жыл бұрын

Actually had to rewind to see if it had actually been a poem all along that I'd missed 😂

@study.neverstop.5098

Жыл бұрын

Melodysheep for the win!!

@Playingwithmud

Жыл бұрын

I also came here to say the same thing! It had quarks vibes

@kikifaye

Жыл бұрын

Sounds like a good line for a SciShow Tangents traditional science poem!

I’m doing my PhD in physical chemistry and I love hearing you communicate science - it helps me set my barometer of which details are generally understandable and which are not. Do I have a lot of brain crack about science communication? Yes why do you ask 😬

@embolobolo4237

Жыл бұрын

It's good that you're mindful about communicating science, it's a skill many should get better at (coming from an engineer working with science communication).

@DasGanon

Жыл бұрын

At the very least, it gives you a framework of communicating with science communicators!

@anna-maymoon1001

Жыл бұрын

Try explaining it to a drunk person at a (quiet) party. Alas I'm a curious lightweight so I'm an excellent litmus test for Does That Make Sense?

@chomo54andbabyaisha97

Жыл бұрын

@@embolobolo4237 The same people who do not know what a woman is, want to imprison people for war crimes for not agreeing with the climate change religion

@nxgrs74

Жыл бұрын

A PhD is no guarantee you cannot be wrong, mistaken or just full of s***.

The black t shirt metaphor for climate change is the first metaphor that has allowed me to fully and completely grasp the concept of what’s going on.

@vlogbrothers

Жыл бұрын

I was quite happy when I stumbled across it. I don't think I would have thought about it if I hadn't spent so much time thinking about IR light because of the JWST!

@darthtace

Жыл бұрын

@@vlogbrothers A note: the black t-shirt metaphor doesn't really work, in that black makes you cooler unless you're standing in completely still air and are stationary yourself. This is because your body is actually a far greater source of infrared radiation than the sun is in relation to the surface area of your shirt. So, while it absorbs the sun's heat, it also absorbs yours. With a light breeze, that heat will be carried away faster; a white shirt, on the other hand, will reflect the infrared light directly back at your skin, trapping the heat. This is especially true since the infrared light trapped by greenhouse gases has been re-emitted by the Earth at lower energies than when it reached us; hence how it gets trapped (it'd be strange if our atmosphere was somehow unidirectional). So it's far more like a white t-shirt than black. However, the metaphor is still useful because the black clothing misconception is so common that we can at least use it like we do the Bohr model of the atom.

@4mpersan

Жыл бұрын

+

@Leo9ine

Жыл бұрын

@@darthtace But, wait, the sun hits the ground with 1,370 watts of energy per square meter. A person puts out nowhere near that much energy. How is it possible that your body is a greater source of IR on a shirt sized area than the sun is? The numbers I found for total human energy output (not even just the IR portion): 100w at rest, 2-400w comfortably, 2000w for an Olympic athlete at peak sprint. Source: a Stanford article that YT ate the link to, but it's the first search result for "human body energy release."

@ahall9839

Жыл бұрын

What I want to know is: what the hell could you have possibly thought was going on if a shitty metaphor made you think you "fully and completely grasp the concept of what’s going on."

My molecules don't jiggle jiggle, they...turn light into kinetic energy?

"Absorb, reflect, or let pass through: Those are the things a material can do" Gonna use this to teach my kids how light works lol.

@ImAHugeTroll

Жыл бұрын

Objects interacting with light can also emit light which happened to be omit-ted in this video (sorry for the pun!)

2:01 I feel the explanation works better if you say "transfers its jiggle" rather than its heat. The jiggle is what causes what we perceive as heat after all, and it makes so much more intuitive sense that a jiggling object hittin another object that jiggles less is likely to cause the second object to jiggle more.

I think we as a species are very good at solving problems given two things: 1) we agree that it's a problem 2) we agree that it's worth solving I think we spend so much of our energy focusing on the minority of people who don't think that its real we end up completely ignoring the quiet majority of people who believe that it's inevitable and therefore not worth the effort to solve.

@thatjillgirl

Жыл бұрын

But I feel like the people in the second group often simply don't understand how bad of a problem it really is, making them more like the first group. Like, it's not all people who are just living in despair; it's also those dumb people who say it's fine if it gets a little hotter because we can just run our air conditioners more, completely missing the scope of the problem and the fact that it's not just that it might be a little hotter outside sometimes.

@Cainly

Жыл бұрын

Agreed! In the US, it seems to me like 1) is a larger issue than here in Sweden, but here I feel like we are struggling with 2) and getting nowhere or even going backwards. Not many solutions seem to be considered worth it either politically or economically by the people with power, even though almost all agree on climate change = really bad.

@miannekahkol9556

Жыл бұрын

There are also some who know it's real, know it's avoidable, and don't care because continuing to exacerbate the problem is profitable.

@AlwaysSeverusAndLily

Жыл бұрын

I think this is right on the money, though I think it is strawmanning the second position a little bit. First, I think there is reasonable disagreement and uncertainty over what the "it" is that is inevitable. Is climate change an extinction-level catastrophe or just really bad (though of course with the burdens falling disproportionately on nation's that don't have the power or population to make a dent in global emissions)? The answer to that affects the cost-benefit calculus. Second are reasonable disagreements over the geographical scope of claims of justice. What do sovereign nations owe one another? Is it important that people can continue to be tied to their ancestral lands? Important enough to prioritize over the same industrialization that has led to vast increases in life expectancies (and not just in wealthy nations)? These are hard questions and while the answer almost certainly isn't to do nothing, positions that fall short of sweeping societal change look reasonable with small tweaks to any of the answers. We get nowhere when we fail to engage in good faith with the reasons motivating those across the political divide. I appreciate that OP's comment starts to do that!

@critiqueofthegothgf

Жыл бұрын

reflexive impotence

'Wiggles' should become standard terminology for climate scientists.

@vlogbrothers

Жыл бұрын

All scientists...everything is wiggles.

@CrashingThunder

Жыл бұрын

@@vlogbrothers Butt may or may not be legs, but at least we can all agree that they're both just lots of wiggles.

@dukeofburgerz5225

Жыл бұрын

Scientists need to stop with the Good Vibrations and get on the wiggle train! Also, i cant stop thinking of "my money don't jiggle jiggle, it folds" from this video

@StretchyDeath

Жыл бұрын

String Theorists have entered the chat

@Tim3.14

Жыл бұрын

@@dukeofburgerz5225 My molecules don't jiggle jiggle, they cold

I just called my senators to urge them to vote for the Inflation Reduction Act (that includes many climate provisions) and I was freaking out about the phone calls but I did it!!! Ahhhhh Climate change is such an important issue. I've only been seriously concerned about it since 2018 or so, and I can't imagine how frustrated people like you, Hank, who have been involved in the climate fight for so long, must be with all of the governmental inaction. Your videos on climate change help me to feel more hopeful for the future. Thank you.

@niemals1969

Жыл бұрын

way to go!! I totally get freaking out abt the phone calls, I’ve been doing stuff like that long enough that it shouldn’t be hard but it still is. but it’s so important so good for you! celebrate that win!!

@Praisethesunson

Жыл бұрын

I'm in Kentucky. 0% chance my senator will support it. I call though. So at least he had one more thing he had to listen and then ignore between being the worst.

@trollpolice

Жыл бұрын

Ahahahaha money printing causes inflation, lets print more money to solve inflation. And you want me to trust commies to solve climate change 🤣🤣🤣🤣🤣

@RobertMJohnson

Жыл бұрын

you should be ashamed of yourself for being such an uneducated, gullible fool

Those were excellent references for reflecting specific wavelengths of light. I reread Pratchett regularly, just blindly grab one and read it all the way through.

Great video! Alas, one small correction: there is a major difference between convection and conduction. Conduction, which occurs in all states of matter, is when how molecules hit colder ones, thus transferring energy. In convection, the hot molecules move themselves towards colder areas. This can happen only manily when molecules can move enough, thus only in fluids which are not too viscous, and is aided by gravit, as hot fluids are generally less dense.

I am so excited to see a Sir Terry Pratchett book in your hands! Excellent choice too. And thanks for discussing this difficult topic.

@pintpullinggeek

Жыл бұрын

GNU Sir Terry

@lu-cipher

Жыл бұрын

@@pintpullinggeek GNU ❤

@-Pam_Guti

Жыл бұрын

the turtle moves! Gnu STP

pausing my Dear Hank And John binge to watch a vlogbrothers video

As an ex-aspiring-particle-physicist, this was the most fun explanation of climate change to listen to that I’ve encountered so far. Also yes I too am still not over the idea that heat comes from being jiggly in a way we can’t feel directly.

Me myself I love my limited edition corvette Z06 C7 Racing Edition, but last year I drove it on average 4 days a week. Now I drive it only once a week and ride my bike. Now let’s imagine everyone cut their driving by 75% WOW what a huge difference that would make, immediately. We need to make a change and make it now.

I like your color sample book choices

Climate scientist here. That was excellent.

It would be interesting with a discussion of how we best can invest our efforts and resources to combat this problem, without unknowingly and accidentaly making the problem worse. Which arguments might be the result of different economic interests, and which possible solutions are good guesses as to the way forward? Can we alter the way things normally are and save more lives than cutting production of different foods? Specifically interested in the arguments of Bjorn Lomborg and the dangers of repeating Mao’s huge mistake. It seems to me agreeing on the portrayed solutions is a really important discussion to have, as there seems to be a slightly polarized debate. Underlining the knowledge behind the solutions is a way to combat that. I think you guys would be great at adressing these issues. Thanks for a great video!

@RobertMJohnson

Жыл бұрын

it's just so pathetic how you leftists think you're going to crash world economies and chase something you can't even prove; ie, controlling weather globally

that was a throw back episode to earlier VlogBrothers and was an Excellent explainer.

That was a lot to digest in under 4 minutes... I _almost_ agree that we can solve any problem as long as we agree that it exists... the caveat is that we also have to prioritize that problem... that seems to be the issue this particular problem faces. Super glad to hear that there are people who understand the problem though!

@Praisethesunson

Жыл бұрын

Billionaires pay millionaires to tell me that climate change is just a communist plot of liberal Islam to take away my guns and freedumb™.

@RobertMJohnson

Жыл бұрын

it's not prioritized b/c it's bs issue

I was about to comment that I was embarrassed that it literally took til this video for me to actually understand even the broadest strokes of what is happening with climate change, but I’m going to reframe it. I’m grateful you took the time to explain it concisely and simply for folks like me who have been in support of fighting climate change but have been left a bit behind in being taught the specifics.

@dark_neverland

Жыл бұрын

Same. 100%

@RobertMJohnson

Жыл бұрын

so before this video, you had political views on climate change, but after watching this video, you realize you didn't even understand the topic. how does that make you feel?

Thank you for explaining it in 4 minutes and saying that it exists

its really just ever so frustrating that the start of this fight begins at convincing others that it.. exists

I always thought it wasn't that CO2 absorbs more infrared light from the sun but instead it absorbs more radiation emitted from the Earth. Most of the light that hits the earth is either visible or UV light as the Sun emits those frequencies the most (see blackbody radiation). Most of the UV light is blocked by the atmosphere while visible light travels through (mostly) unaffected. The problem arises from the fact that the Earth emits light, and thus sheds its excess heat, in the infrared regime (for the same reason living beings light up on an infrared camera; objects ~50-100 deg F emit mostly infrared radiation). The CO2 in the atmosphere then absorbs this light and emits it in every direction, with ~50% being reflected back into the lower atmosphere and towards Earth's surface. So it's not that more heat is coming into the atmosphere but that less heat can escape. A bit nitpicky, I know, but just wanted to point that out

@dukeofburgerz5225

Жыл бұрын

It does do both, but it's harder to grasp that CO2 in the atmosphere acts as both a black shirt for all the IR radiation from the Sun, but also as a mirror for the IR radiation coming from the Earth

@ariaflame-au

Жыл бұрын

@@dukeofburgerz5225 trouble is, it’s misleading because if it wasn’t there it would pass through to the earth anyway be absorbed and heat it up. Just not as much as the visible light which has more energy

@LcdDrmr

Жыл бұрын

The Earth emits just as much heat out to space as it ever did. That never changes. It can't be increased, though. Meanwhile, we're diminishing the albedo of the Earth while also creating a lot more heat with our activities. This heat doesn't amount to all that much, if we weren't putting so much CO2 into the atmosphere that sequesters that heat in the atmosphere. We have less and less plant cover to absorb CO2 and the oceans are nearly saturated with what they can absorb, so we're in dire straights now. The important thing is that as long as it took us to create this backlog of heat that needs to escape to space, it will take at least that long again for it to do so, even if we stop pouring any CO2 up there. If we stop dead now, the temperatures are going to continue to rise, and it will be about 300 to 1,000 years before CO2 comes back down to the present level of ~400ppm, let alone back to 280ppm. And none of this accounts for the effects of methane or feedback loops that will very quickly make things worse.

@jimbrookhyser

Жыл бұрын

Yeah, It's a shame that it's confusing, but learning involves being confused. I don't think we do well to use inaccurate analogies, and just gloss over the totally wrong parts of the comparison. Don't take it to seriously when someone says "this stuff was always so confusing to me, but you made it so much simpler. I GET it now!" Makes me cringe every time.

Why that one frame?

@vlogbrothers

Жыл бұрын

Well...sometimes you gotta just put in one frame of a piece of stock footage you decided not to use...totally intentionally...definitely 100% on purpose. Yep!

@Martina-bg1oi

Жыл бұрын

bahahah I slowed it way down to find what frame you were talking about and Hank are 0.25x speed sounds HAMMERED

wait wtf why did I not learn that CO2 and Methane are black in the infrared spectrum? I have a god damn bachelors degree in environmental science

What people don't seem to understand is it will get worse before it gets better. Humans have spent hundreds of years industrializing the planet (and thousands of years changing the planet before that) and it will take time to balance out our impacts. As we have adapted the world to are needs with cities, agriculture and infrastructure specialized species unable to cope with the changes we've made may go extinct and climate patterns with become more extreme and dangerous but eventually, with the effort of multiple generations, our environments will change to coexist with a natural world, generalist species will adapt and diversify, and we'll stabilize the climate.

I’ve never heard it described this way. You’re always interesting Hank

We can end like 2/3s of our emissions just by living in walkable cities. Nobody needs a car if you build your city the way humans have built cities for 5000 years. And rowhouses and apartments can be heated and cooled for a miniscule fraction of a suburban McMansion. It would also make everyone's lives cheaper (in direct car costs and in local taxes for infrastructure) and healthier (in exercise benefits from walking and mental/social benefits of actually seeing your neighbors). I hope you guys do an explainer on urbanism someday! Until then, people should check out Not Just Bikes :)

@Praisethesunson

Жыл бұрын

You are 1000% correct. But the things you suggested won't make the already wealthy (who are heavily invested in the industries who created those fossil fuel intensive messes) slightly richer. Therefore your ideas are communism and must be purged from freedumb™ loving America.

Thanks Hank for putting a concepts that many cannot understand into understandable terms. Back in grade four I did a presentation on climate change ( 8 years ago) and still now many people Don’t or choose not to understand the looming threat of it. We have made strides I think to slow down climate change but there is much more to be done.

A brilliant summary, well done.

This was great, thank you! Would you also like to do a follow up on the best possible mitigation solutions and how to go about things? But this would also include discussing political questions due to considerations of consumption and decolonisation. Anyway thanks and also I didn't quite get how exactly increase in greenhouse gases would directly lead to increased precipitation and extreme weather events?

@kaypgirl

Жыл бұрын

Crash course geography might help with the weather one. A hotter climate disrupts weather patterns. And that series should cover that. Scishow should also have some climate videos and hopefully a playlist.

Now I’m going to be constantly thinking about how the molecules around me are jiggle jiggling

Small correction: When you are not in direct sunlight radiation still forms a very significant part of the heat you feel. In fact, in building physics it's often said that 55% of your subjective warmth experience indoors comes from radiation from walls, floor and ceiling, and only 45% from convection/conduction. A wood floor feels warmer, not because it looks that way but because it literally radiates more heat to you. Remember that every object in the universe is constantly radiating heat.

Whoah! That covers a lot, so concisely

Loved this guy from crash course. Finding this vlog was almost like meeting an old friend that tutored me in Junior College

As an ecologist I appreciate you talking about this Hank!

My money don't jiggle jiggle, but my molecules do.

Recently I was at school and found an old TIME magazine from 2006. The cover article was about the tipping point for climate change, and most of the contents were explaining what climate change is and how it works so people can agree that it exists… I hope it’s not too late for things to change

Convection refers to fluid flow caused by buoyancy when there are areas of different density in in fluid. Heat transfer between molecules in a fluid is still conduction.

I like to think of myself as well educated on climate change and it’s causes but I don’t think I really understood it until now. That is absolutely the best explanation of climate change I have ever seen, heard, or read. Thanks Hank.

happy friday! dftba

@louismyers8845

Жыл бұрын

Dftba!

@untappedinkwell

Жыл бұрын

DFTBA!

That's a very clear and concise summary.

That is such a fantastic way to understand the problem...

Hank is my hero for holding up two books from two of my favorite authors!

"absorb, reflect, or let pass through... the only three things a material can do" that'd make a fine song lyric.

Great work!

anyone who holds up a discworld book has my support tbh

Thank you for this Hank

Excellent choice of books!

We're going to be in a live wet bulb experiment here by next Wednesday.

My problem with using the word “greenhouse” is that I went into a greenhouse for the first time LAST YEAR. Like most people don’t even know how greenhouses work

@wakjagner

Жыл бұрын

Well you see, greenhouses work a lot like our atmosphere, only instead of using CO2 of CH4 to trap in the heat, it uses glass. /s

@chris-hayes

Жыл бұрын

And they're not even green! They're like a whitish gray color

@Praisethesunson

Жыл бұрын

@@chris-hayes Green houses aren't even green? I feel so lied to.

@IceMetalPunk

Жыл бұрын

@@chris-hayes A greenhouse is not a green house, it is a house for green things 😁

@ijustwannaleaveacommentony6511

Жыл бұрын

​@@wakjagner was it made of 0.04 % glass?

Super important video, thanks Hank!

0:30 keeping this in mind, are thermometers simply molecular speed guns?

Why is Hank calling me John? Is my name John now? Ok, my name is John now

@mnm1273

Жыл бұрын

On vlogbrothers they make videos talking to each other. The other guy on the channel is John and will talk to Hank in his videos.

Thank you.

"There's no way we're getting out of this, without a lot of really good ideas." -Hank Green, 2007

@Praisethesunson

Жыл бұрын

A really good idea is overthrowing the capitalist system plunging the world into climate hell to make a few already wealthy ghouls slightly richer.

@langdons2848

Жыл бұрын

I think it's fair to revise that to just "There's no way we're getting out of this." Even the IPCC (as incredibly conservative as it is) has accepted and stated that climate change is abrupt and irreversible. What people still don't appreciate though is how bad "abrupt and irreversible" will be sooner rather than later for all of us.

@dnice4335

Жыл бұрын

SO after 14 years, what ideas have you come up with?

@langdons2848

Жыл бұрын

@@dnice4335 I often hear people talking about how inventive and adaptable humans are. But when it comes to climate change all of the inventiveness and adaptability seems to have been put into denying, ignoring, and downplaying it rather than prevention...

@Praisethesunson

Жыл бұрын

@@dnice4335 Seize the means of production from the Capitalist ghouls burning the world is a solid plan

Very nice synopsis, Hank. 🙂

at 3:30 the captions say "more" instead of "less" -- idk how to change this

"Absorb, reflect, or let pass through: that's basically the only thing a material can do" sounds like the start of a song haha!

I trust you because of your literary choices! Thanks Hank!

That was... insanely and beautifully put

So good. Thanks, Hank.

Hey Hank! Absolutely love the video, though the subtitles at 3:29 say 'more' instead of 'less'. Just letting you know :)

🎶 My molecules don't jiggle jiggle, I'm cold. 🎵

Thank you sm for this video I never knew how it really worked

the thing about ac causing power gris to fall happened where i live 2 weeks ago! there were a lot of blackouts all over the country

Thank you

love to see hank take any possible opportunity to plug discworld

Hank Green is holding up my very first discworld novel which means he probably has read it and I just 😭😭😭😭😭😭😭

Small correction at 2:08. Conduction AND convection occur in gasses. They are not the same thing with different names.

Just to nitpick: "Convection" is energy transfer because the hot thing moved to a new place before releasing its extra energy. That's why it generally happens in fluids, but it isn't just what we CALL energy transfer in a fluid. So if you were playing the game Hot Potato with a literal hot potato that you'd just taken from the oven, that would technically be considered burning your hands by convection even though you're tossing around a solid.

The melting of the ice caps is absorbing some of this heat (like an ice cube that keeps your glass of water at 0°C). Once all the ice is gone, the temperature increases will be more obvious.

@kaypgirl

Жыл бұрын

People also don't seem to realize that the ice caps are a key part of the weather system and it will be very, very bad if they go away. The ice caps are the reason we have ocean currents.

A better explanation than I got in school... thank you.

Good book choices.

Always interesting, and made that much better by the appearance of a Discworld Book. GNU Sir Terry Pratchett.

such important things to be talking about!!

Always happy for a vlogbrothers video! Why a one frame flash of a graphic of the sun and Earth at 0:15 ?

@akinpaws

Жыл бұрын

To see if you're paying attention.

3:39 Include Military Infrastructure to this list. Pound for pound, military industrial complexes induce massive CO2 output and have been notoriously slow to change to climate-friendly hardware. It's hard to replace fossil fuel for systems that rely on instant, explosive power at scale, and harder still because military superpowers include legacy hardware(check Russia's ancient Soviet-era tanks moving into Ukraine for example) as part of their total calculus for forces and total war scenarios. Militaries typically do not transition hardware right away because it diminishes combat ready firepower in the moment.

got those Richard Feynman vibes. If only it was a knowledge gap that was the problem.

Hi Hank. Regarding this replacement of energy needs with something that doesnt create CO2, can you PLEASE spread the word about the incredibleness of thorium reactors? We need more people talking about it and more money spent on it because this is a very logical, plausible, and important possible solution for coal burning energy production replacement.

I thought convection was when the heated matter moves itself, so it doesn't need to conduct heat to other matter to move heat from one place to another. Which happens more in fluids because fluids naturally move themselves around to transport heat when temperature differences cause density differences which cause buoyancy? Not just "conduction but it's in a fluid instead of a solid". In a zero-g environment it seems like convection wouldn't happen (in a fluid) because the buoyancy requires gravity, but conduction and diffusion would still transfer heat through it, just less quickly than it would with convection.

Going Postal is a great book. I just got into Terry Pratchett.

When you brought up a “clear” shirt it made me think of that SpongeBob episode where he made a sweater out of his tears

... and as always, the power is yours!!

Woahhhhh🙌🙌🙌 this has never made more sense to me.

This is an amazing video!

I think your captions may be wrong, did you mean to say the only way to stop global warming is for there to be “more co2 and methane from the atmosphere”? I wasn’t sure what that meant. Thanks for the video, I thought it was well put and simple to understand!

This summer has been hot. I enjoyed last winter not being as snowy though.

Going Postal might be my favorite Discworld novel.

This was not what I expected, but really good and compact explanation.

1:31 nice rhyming couplet!

We can also pump our atmosphere full of more white molecules to reflect more energy coming in, and while we already know which molecules to use we still need to figure out whether and how to do it safely without causing even more problems than we are currently having.

A blanket obeys Q = U A dT. 0.04% CO2's specific heat capacity plays an insignificant role. The physical walls of a greenhouse closed systems stifles the kinetic convective processes rasing the required dT. The atmos is an open system w/o physical walls. In case you had not noticed.

I gained a better understanding of physics in this video alone than in my entire bachelor's degree (in engineering, no less!) Thanks Hank!