Global Warming US Cities Getting Warmer

A comparison of GISS data for the last 111 years show US cities getting warmer but rural sites are not increasing in temperature at all. Urban Heat Islands may be the only areas warming.

Category:

Science & Technology

Tags:

• Global
• Warming
• Urban
• Heat
• Islands
• GISS
• NASA
• Climate
• Change
• Skeptic
• Data
• Temperatures
• heat
• surface
• station

[TheseData]

We are in process of analyzing over 600 rural sites across the US. It will take some time to do so. We are looking at sites with temperature readings from 1930 to 2009 (80 years). We do see a difference in sites near cities and those further away. There are regional differences. Some regions could be said to be warming, some neutral and some cooling. Overall the pattern is that temperatures were average or a little warmer until the 50's, then got colder, then got warmer. More later.

[TheseData]

1- you don't have "error bars" on curve fits. You have R2 values which are there. The R2 values are low and show the lack of significance.

2-we picked what sites we could find that met our criteria.

3-Our method was to look at sites within 100 km of each other (matched sites).

4-see 3

5-We do not make any global statements, only about the two populations compared.

[TheseData]

As was mentioned before, the US is really the only location that has enough temperature stations where one can find both urban and rural sites within a 100 km radius. There are possibly a few outside the US but hard to find. Also, you want sites that both go back at least 70 years with continuous reads. We were able to go back to before 1900 with the US sites. We are now analyzing US rural sites at least 50 km from urban sites. We hope to have over 500 done in a while.

[TheseData]

Peter's Dad here. Remember, this is only a little illustrative video. It shows a comparison of two populations. As we explained, the US is really the only location that has enough sites for this type of comparison. We are currently looking at the US rural sites and it will take some time to finish the analysis.

[TheseData]

We used the "combined data" for the site and we collected the data in the spring of 2008. I have looked at a couple of the sites and the data are now different. I know that JohnV who comments on the Wattsupwiththat site has done a comparison and has found differences. Thank you for watching the video

[juuel321]

great video good job =) So global warming is not happening in New Zealand, not in USA, not in FInland, where is it really happening then? North pole seems to be one of the few places warming right now. true?

[TheseData]

There are no conclusions presented in the video concerning global warming. It is a comparison between two populations of sites, one shows warming and one does not appear to show warming.

[jtalcott]

ed2see, I must assume that you are kidding. Obviously, the gathering of people does not cause temperatures to rise. Rather, the way we create the cities in which people gather involves building materials such as concrete that tend to trap heat during the day and radiate it during the night, leading to a higher average temperature readings at sites which have urbanized over the last 100 years. More concrete, more perceived temperature. Not, as people would like you to think, catastrophic AGW.

[RealOldOne2]

Karen

Are you saying that the GISS temp data is garbage (ie. has discontinuities, bad stations, etc) and cant be used for any analysis?

If youre not saying that, then tell Pierre which GISS data set he should use.

Also tell him if any of the 56 stations that he used are BAD ones.

Dont just tell Pierre that hes doing it all wrong.

Help this fine young man do his experiment PROPERLY.

Im going to try to replicate his experiment so that it can be *peer-reviewed*.

Be our technical advisor.

[tiffcomp]

This is nothing but misinformation

Plenty things could happen

I could win the lotto, i never do

Thinking i could win the lotto should i spend the money now?

Well i could win the lotto so shouldn't i count on it happening? Of course not!!!

None of this is based on proven science.

It is all hypothetical.

Since when do we make disicions based on hypothetical scenarios.

We are better and smarter than this!

We need to look at the people who claim these things, and why they are claiming them.

[Catoni52]

Good video..... but the background music is very distracting when listening to a lecture.. Maybe leave voice level the same, and lower the music level until we can barely hear it. The music is too loud compared to the voices.

[davidcourardhauri1]

Nice work! Good curiosity. You have found what other scientists have found: warming in the United States has been very limited compared with other parts of the world over the time frame you are looking at. Most of the global warming is happening in polar regions, over Asia, Europe, and Africa, and over the Atlantic and Indian oceans (confirm on the GISS site). What worries me is that your commenters are acting as if this contradicts what scientists say--and that's not true. Scientists know this.

[wikeroy]

Well done! If only more people would seek the raw data and investigate, instead of flatly believe what idols, rock stars and the media says. Most of the time they have a hidden agenda.

[r31ncarnat3d]

@TheseData Good luck explaining stats to them... Most people who have never taken a stats class in their lives still subscribe to the "Correlation proves Causation" fallacy, let alone understand R^2 values or the explicit conclusions drawn from data analysis.

[RichardRoy2]

That was brilliant. Interesting what kind of speculation can go to explaining the changes in the urban centres. Off the top of my head, I'd say building materials and/or practices, or the wastful use of energy that ends up heating the suroundings. Could be architectural design. Could be poor insulation. Reduction in vegetation in those areas? Enjoyed the presentation. Thanks.

[Finlandcitizen]

Indeed, Phil Jones actually made an peer-review paper about the Urban Heat Island effect on China and how he compensated for it.

How about that.