Search found 164 matches

by dawolf
Tue Mar 15, 2016 1:21 am UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 78952

Re: What-If 0145: "Fire From Moonlight"

Let us know how you get on trying to light a fire using earthlight (which, by your argument, should be sufficient to start a fire at a close distance from the Earth). There's a big difference between 1340W/m 2 of highly organised, very nearly parallel sunlight and 1340W/m 2 of disorganised, diffuse...
by dawolf
Mon Mar 14, 2016 11:48 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 78952

Re: What-If 0145: "Fire From Moonlight"

I was wrong. It turns out that the Moon indeed is an emitter, I just hadn't thought it through. It emits in infrared, since it is at thermal equilibrium(more or less). This defines the limit, I think. 304W/M 2 (average). It is not the temperature of the moon that matters, it is the photon density. ...
by dawolf
Mon Feb 29, 2016 12:15 pm UTC
Forum: What If?
Topic: What-If 0146: "Stop Jupiter"
Replies: 60
Views: 32317

Re: What-If 0146: "Stop Jupiter"

Actually, that looks to say "Penn 15", Penn being a common brand of tennis ball (leastways, here in the states). The 15 of course, is for the ancient schoolyard wangerdoodle joke. See also T-shirts for the Pennsylvania state university class of 2015 -- "The Hardest Class in History&q...
by dawolf
Thu Feb 25, 2016 5:50 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 78952

Re: What-If 0145: "Fire From Moonlight"

The moon is actually a mix of these two, but, given as mcdigam points out on page two the moon absorbs more light than it reflects, which means the majority of energy is coming back out as perfectly diffuse black body radiation, and significant portion of the remainder is diffused by the nature of ...
by dawolf
Wed Feb 24, 2016 11:34 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 78952

Re: What-If 0145: "Fire From Moonlight"

And if Randall's numbers are correct, that the lunar irradiance is 1/400,000 that of the sun, then yes indeed a lens 400,000 times the size required by a solar one would work as far as I'm concerned. It does not, as the what-if describes, and has been pointed out numerous times in this thread now. ...
by dawolf
Sat Feb 20, 2016 9:37 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 78952

Re: What-If 0145: "Fire From Moonlight"

Ok, my physics degree is over a decade old, but this just doesn't feel right to me. If the moon was emitting as a blackbody at 100°C, we wouldn't see it apart from as a black shape. So the light which is reaching us from the moon ISN'T from a body at 100°C, it is from the sun. Now forget temperature...
by dawolf
Wed Nov 25, 2015 1:21 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1608: "Hoverboard"
Replies: 141
Views: 84535

Re: 1608: "Hoverboard"

I could not help but look inside the source code to find out how many coins there are and I had to smile a big smile when I saw the message that will be displayed when you have found all the coins. Now I'll have to go find them all so I can proclaim “Yes, indeed I am!”. 169 coins based on my readin...
by dawolf
Wed Nov 25, 2015 1:03 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1608: "Hoverboard"
Replies: 141
Views: 84535

Re: 1608: "Hoverboard"

154 coins in 3014 seconds, quite a fun journey! I already know I missed the volcano lair, but I had fun with those huge ships to navigate. either 153, 159 or 163 coins in 4043 seconds. I looked at the number for a split sec, tried to screen shot and it vanished :( And now I'm doubting my own memory...
by dawolf
Mon Mar 02, 2015 4:48 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1492: "Dress color"
Replies: 362
Views: 61074

Re: 1492: "Dress color"

My immediate reaction on seeing the picture was that the dress is light blue and dark bronze. After some time, I now see it as being a deeper, darker blue and bronzish-tinted black (yes, that is a thing to me). I cannot, for the life of me, not even for a single instant, see any white in that dress...
by dawolf
Mon Mar 02, 2015 4:40 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1492: "Dress color"
Replies: 362
Views: 61074

Re: 1492: "Dress color"

OK, I get that people who think the photo has a yellow tint adjust, and see black/blue: and that those who see a blue tint adjust, and see yellow/gold. What I don't understand is WHY people automatically adjust and assume a colour change. I see it as blue/gold, absent any definitive information that...
by dawolf
Tue Jun 17, 2014 4:25 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Geology - "We believe that the Earth was formed via A, B and C. Because of that, our hypothesis is that in rock that is X years old should have qualities Y and Z. So we gather rock that is X number of years old from across the planet and look for qualities Y and Z. If both are present, we're r...
by dawolf
Tue Jun 17, 2014 4:00 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Izawwlgood wrote:Are those not scientific fields because they cannot perform true experiments?


I'm interested to know what repeatable experiments they can use to prove the vast majority of geology. Or biology.
by dawolf
Tue Jun 17, 2014 3:36 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

You're in the know oh keeper of hidden and mysterious knowledge that has been kept from us plebians by the insidious ivory tower hooligans! Couldn't have said it better! The truth is in the results, and so far - divergence from IPCC predictions (see avatar.) As I said before, if there were a legal ...
by dawolf
Tue Jun 17, 2014 3:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

The globe can warm due to human produced CO2 and AGW can still be false. Eh....just no. By definition, if the globe has warmed due to human produced CO2 then there has been anthropogenic global warming. By DEFINITION, as that's what the words "Anthropogenic" "Global" & "...
by dawolf
Tue Jun 17, 2014 2:27 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Did I argue that the ice isn't shrinking though? So what is your view? As far as I can make it out, it's this 1) Ice is shrinking 2) This is due to (a)geological processes & (b) reduced precipitation over the ice sheet. 3) Increased precipitation over the oceans is causing them to rise. Is this...
by dawolf
Tue Jun 17, 2014 1:45 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

http://adsabs.harvard.edu/abs/2013AGUFM.G23A0767S Dyno, no-one here has disagreed with you that reduced precipitation on land has impacts on water (in this case, ice) levels. It is well known that climate change can lead to both droughts and floods. I'm not sure how linking to a document showing ic...
by dawolf
Tue Jun 17, 2014 12:15 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

What exactly does evaporation (in general) have to do with the relative amount of rainfall on the landmasses vs over the ocean. ... ... Oh yes, that's right, nothing. Because it's about CHANGE of total water, and you are only looking at what water is being ADDED to each. It's like doing a sum with ...
by dawolf
Tue Jun 17, 2014 12:01 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

What exactly does evaporation (in general) have to do with the relative amount of rainfall on the landmasses vs over the ocean. ... ... Oh yes, that's right, nothing. Because it's about CHANGE of total water, and you are only looking at what water is being ADDED to each. It's like doing a sum with ...
by dawolf
Tue Jun 17, 2014 11:07 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

But lets play. Where does the water in clouds come from? Don't be daft. There are three reservoirs: 1) The ocean 2) The landmass 3) The atmosphere The correct answer is evaporation (and transpiration etc, if you want to get technical). Water from evaporation -> water in atmosphere -> water in cloud...
by dawolf
Tue Jun 17, 2014 11:01 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

I was never talking about the actual state of affairs right now. What I said, and I am just going from memory now but you can go look at my post, was that is POSSIBLE for sea levels to rise without temperature increasing, ignoring everything else it is possible simply because for the lag in glacial...
by dawolf
Tue Jun 17, 2014 9:21 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

But lets play. Where does the water in clouds come from? Don't be daft. There are three reservoirs: 1) The ocean 2) The landmass 3) The atmosphere The correct answer is evaporation (and transpiration etc, if you want to get technical). Water from evaporation -> water in atmosphere -> water in cloud...
by dawolf
Tue Jun 17, 2014 8:10 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Just explain it in a scientific manner. The theory. Why should anyone waste their time on this? It can either be explained simply (in which case you'll argue that it's too simple), or with complexities (in which case you'll look to poke whatever imaginary holes you can). My degree project (physics)...
by dawolf
Tue Jun 17, 2014 7:37 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

I understand something that you don't: The little picture you were taught in primary school is for illustrative purposes only. Really? That's not even an argument. You already violated the little graphic which doesn't contradict the bigger graphic . All of your posts are bunk, Dyno. I was trying to...
by dawolf
Mon Jun 16, 2014 11:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

The style, the tone, the way global warmers talk to people, it doesn't even matter what they are saying. Nobody cares what somebody is saying when it comes across as talking down to a non-believer. Global warming is no religion, but the constant promoters of it certainly come across as religious nu...
by dawolf
Mon Jun 16, 2014 11:31 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

brians356 wrote:I wonder what James Hansen thinks when he looks out his window at the West Side Highway he promised would be under water by now.


Didn't that flood in Hurricane Sandy?
by dawolf
Mon Jun 16, 2014 9:02 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Brian, please stop referring to your avatar. That was already discussed pages ago, with the different models depending on different levels of CO2 and with the current state of affairs within variance for both curves.

Bringing it up ad nauseum is tiresome.
by dawolf
Mon Jun 16, 2014 8:57 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

You're in the know oh keeper of hidden and mysterious knowledge that has been kept from us plebians by the insidious ivory tower hooligans! Couldn't have said it better! The truth is in the results, and so far - divergence from IPCC predictions (see avatar.) As I said before, if there were a legal ...
by dawolf
Mon Jun 16, 2014 8:44 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

The big issue in the Antarctic though, as far as I understand it, is a decrease in precipitation. You would also expect sea levels to rise if rainfall just shifted to be more over the ocean than over the land, which could happen entirely independently of temperature. Oh. Oh my. You don't actually u...
by dawolf
Mon Jun 16, 2014 6:16 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

gmalivuk wrote:dawolf, you have 130 more posts than you need for urls to be accepted without flagging as spam. Pasting them normally instead of putting the dots in brackets would make them clickable, which would be nice.


Thanks, edited.
by dawolf
Mon Jun 16, 2014 6:15 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

I'd also point out, again, that efficiency improvements have no single magic bullet. Each and every area needs to be looked at, and most of those areas can make improvements. A quick short list, from a western perspective: 1) Lighting efficiency improvements (which are happening) 2) Car/truck fuel e...
by dawolf
Mon Jun 16, 2014 6:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Eh. That 2% ain't gonna hit zero, even with massive efficiency boosts. The possible gain of a ban vs, yknow, letting tech take it's course is pretty marginal. May actually be negative, because of cases where incandescent is situationally better than CFL/LED. Just one quick source (it'll do to illus...
by dawolf
Mon Jun 16, 2014 5:23 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Exercise for the reader: Point out any human-influenced periods of high CO2 level in the attached graph. It's interesting that you use the version of this graph (which I've seen before) without uncertainties. Why could that be? Also, why not look at say the last 400,000 years, where the uncertainti...
by dawolf
Mon Jun 16, 2014 4:29 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

@gmalivuk Whilst 2% is not a huge amount, it should be appreciated that there is no single magic bullet. 2% here, 2% there, they do add up. And lighting is almost the definition of a low hanging fruit because of the knock on effects (actually cheaper etc). If we can't save an easy 2% at very little ...
by dawolf
Fri Jun 13, 2014 12:23 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Funny, invoking the convenient "weather is not climate" ruse when it suits the argument. You do computer stuff? Hearing someone fail to comprehend the difference between weather and climate is similar to hearing someone say they can't tell the difference between a mobile phone and a super...
by dawolf
Thu Jun 12, 2014 12:09 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

3. - Taxes are at a long-time low, but that in no way refutes the idea that liberals would like them to be much, much higher. And conservatives would like them to be much, much lower, and no matter which direction things go, both statements will continue to be true. Both positions are insane, as a ...
by dawolf
Wed Jun 11, 2014 3:59 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

The big problem with AGW-supporters is that they seemingly fail to understand that the key in science is not proof, Proof is absolutely key to science. The only key? No. and being only understandable to "experts" is not a virtue, It's very understandable to non-experts as well. There are ...
by dawolf
Wed Jun 11, 2014 10:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

Dyno, in that situation is would have to have been 11000 out of those with "Bigfoot" or "Sasquatch" in the abstract. In the same way as they were specifically looking for those with "Global Climate Change" or "Global Warming". No, they couched it in such a wa...
by dawolf
Wed Jun 11, 2014 9:58 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

I don't want to insult anyone, but apart from anything else, I really do believe that anyone citing the "97%" figure should be barred from making further "scientific" claims.. Again, why is your ignorance about the 97% consensus of any concern to the world at large? Why should I...
by dawolf
Tue Jun 10, 2014 11:45 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

provided humanity survives the initial impact I do believe that yes, we can also survive the consequences. For a time, at least. We've just got too many built up resources to die off that easy. But when I spoke of climate change I wasn't talking about climate change caused by an extinction event li...
by dawolf
Tue Jun 10, 2014 11:19 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 152052

Re: 1379: "4.5 Degrees"

People talk about Global Warming like its going to be the end of the world. But I don't know that it is. Humans are resilient and the human race has survived climate changes in the past with far fewer resources than what we now have at our disposal. "Dinosaurs have survived climate changes in ...

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