UHI in South Korea – responsible for over half of the warming

This new study published in  the Journal of Atmospheric Environment quantifies the different components of warming there, with UHI making up over half of the total warming:

On average, the total temperature increase over South Korea was about 1.37 °C; the amount of increase caused by the greenhouse effect is approximately 0.60 °C, and the amount caused by urban warming is approximately 0.77 °C.

A perfect long term urbanization experiment exists that can illustrate and test this:

satellite image of the korean penninsula at night, showing city lighting

satellite image of the korean penninsula at night, showing city lighting

The real test of this would be if North Korea has maintained a surface temperature record that could be compared. Given that they are a closed country, chances are that if it exists. getting it is close to zero. What I wouldn’t give to get it. I wonder if Phil Jones has any?

Here’s the paper abstract:

Quantitative estimates of warming by urbanization in South Korea over the past 55 years (1954―2008)

Auteur(s) / Author(s)

KIM Maeng-Ki (1) ; KIM Seonae (2);

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Atmospheric Science, Kongju National University, Gongju 314-701, COREE, REPUBLIQUE DE
(2) Applied Meteorology Research Team, Environmental Prediction Research Inc., Daejon 302-831, COREE, REPUBLIQUE DE

Résumé / Abstract

The quantitative values of the urban warming effect over city stations in the Korean peninsula were estimated by using the warming mode of Empirical Orthogonal Function (EOF) analysis of 55 years of temperature data, from 1954 to 2008. The estimated amount of urban warming was verified by applying the multiple linear regression equation with two independent variables: the rate of population growth and the total population. Through the multiple linear regression equation, we obtained a significance level of 0.05% and a coefficient of determination of 0.60. This means that it is somewhat liable to the estimated effects of urbanization, in spite of the settings of some supposition. The cities that show great warming due to urbanization are Daegu, Pohang, Seoul, and Incheon, which show values of about 1.35, 1.17, 1.16, and 1.10 °C, respectively. The areas that showed urban warming less than 0.2 °C are Chupungnyeong and Mokpo. On average, the total temperature increase over South Korea was about 1.37 °C; the amount of increase caused by the greenhouse effect is approximately 0.60 °C, and the amount caused by urban warming is approximately 0.77 °C.

Revue / Journal Title

Atmospheric environment    ISSN  1352-2310

h/t to Pierre Gosselin at No Tricks Zone

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73 thoughts on “UHI in South Korea – responsible for over half of the warming

  1. No doubt, URBAN WARMING especially in winter……but how much does this translate into global values….the Earth is large and round…..

  2. While the earth is large and round, most ground measurement stations with a long established record are situated in urban areas that have been built up during the last few decades that coincide with most of the perceived warming. Virtually all stations are situated in the immediate vicinity of settlements as opposed to the open mongolian steppe or on drifting icebergs.

  3. How can they be sure that the rest of the heating was due to the Greenhouse effect? Have they ruled out the sun’s contribution?

  4. Didn’t the IPCC declare that their models proved that urban warming has only increased by 0.01C over the last century?

  5. Korea’s a good test case in part because the cities there have grown so rapidly. Does anyone have a copy of the paper so we can see what the linear regression revealed?

    w.

  6. According to the Fourth Assessment Report from the IPCC: Studies that have looked at hemispheric and global scales conclude that any urban-related trend is an order of magnitude smaller than decadal and longer time-scale trends evident in the series (e.g., Jones et al., 1990; Peterson et al., 1999). This result could partly be attributed to the omission from the gridded data set of a small number of sites (<1%) with clear urban-related warming trends. In a worldwide set of about 270 stations, Parker (2004, 2006) noted that warming trends in night minimum temperatures over the period 1950 to 2000 were not enhanced on calm nights, which would be the time most likely to be affected by urban warming. Thus, the global land warming trend discussed is very unlikely to be influenced significantly by increasing urbanisation (Parker, 2006). … Accordingly, this assessment adds the same level of urban warming uncertainty as in the TAR: 0.006°C per decade since 1900 for land, and 0.002°C per decade since 1900 for blended land with ocean, as ocean UHI is zero.

    http://en.wikipedia.org/wiki/Urban_heat_island#Global_warming (last paragraph)

    How do this compares to this study?

  7. The chances of Phil Jones having any of N.Koreas surface temperature data and willing to share ? close to zero I suspect.
    Dont forget, this is a regime run by a collection of totalitarian despots, totally immune to the needs of the people, they exist only to perpetuate their own lust for power and status. Human misery means nothing to these megalomaniacs and the penury of the people matters less. With their pseudo-Marxist philosophy and their mendacious twising of every mundane fact to support their viscious propoganda, they barely deserve the acknowledgement that they exist.

    And the North Koreans are even worse

  8. I don’t have access to the paper, but I’m willing to bet they are using min/max temperatures, most of the warming is in the minimum temperatures. Pointing to reduced urban aerosols and aerosol seeded clouds as the cause of the urban warming.

  9. Note that many people probably have more access to scientific papers than they realize. If you are a member of an alumni association, you might have access to academic research papers and journals. For example, Stanford Alums may go to:

    https://alumni.stanford.edu/get/page/perks/OnlineDatabase

    Log in where it asks you to. At the bottom of the presented list of choices you will see “EBSCO Academic Alumni Edition”. Select that one a and you can select “Academic Search Alumni Edition”. Note that the Alumni edition does not allow you to read all such papers (this one is not available for download, for example) but many are.

    The point is that if you are a member of an alumni association, you might have access to more papers than you might know, worth checking out.

  10. I find the valuation of the UHE very interesting and quite valuable. Now let us apply it to readings throughout America and see where we stand.

    As for the core temperature rise due to greenhouse gases, this author thinks it is partly due to the decadal oscillation.

    http://onlinelibrary.wiley.com/doi/10.1002/joc.797/pdf

    Since Seoul is so close to the border, alliterate comparisons should be very helpful. So where are they?

  11. The 0.6 degrees over 55 years corresponds very well with the global 0.1 degrees per decade warming rate that has been observed. And the 0.8C since 1900.

    The measurement of the UHI in Korean cities has not made that go away. Sorry, the elephant is still in the room.

  12. North Korea may be a strange place, particularly in the political area, but I suspect that they just might be open to sharing what information they have if approached in the right way.

    If they could claim that their contribution was responsible for showing up current Western climate science for the bunch of crap that it actually is, and for putting the world back on the right track, I suspect that they would jump at the chance.

    Of course, we have no idea at all if they have been keeping temperature records, let alone accurate ones.

    But as my mum used to say: “There is no harm in asking”.

  13. On average, the total temperature increase over South Korea was about 1.37 °C; the amount of increase caused by the greenhouse effect is approximately 0.60 °C, and the amount caused by urban warming is approximately 0.77 °C.

    Huh?

    I’d be more likely to believe 0.77°C from UHI effect if it wasn’t stated that “everything else” is attributable to the GHE. As I read this it suggests no natural warming component whatsoever.

    Hence I’m suspicious of both values.

  14. LazyTeenager

    As far as ‘climate science’ is concerned, the “elephant in the room” has always been natural climate cycles.

    Warmists refuse to believe climate can change naturally – well, to be more precise, they most particularly do not believe it can change naturally right now. Trying to fix climate, which is the warmist goal, is absolutely impossible. Anyhow, the goofy/green politicians are now spending hundreds of billions of dollars trying to achieve the impossible.

    Returning to the subject of UHI, warmists always insist on underestimating its effect as it causes too many inconvenient aberrations in the pre-determined conclusions of their models.

  15. In a worldwide set of about 270 stations, Parker (2004, 2006) noted that warming trends in night minimum temperatures over the period 1950 to 2000 were not enhanced on calm nights,

    Parker used minimum temperature, which don’t typically occur at night, they occur in the early morning. The Parker studies tells us nothing about nighttime temperatures.

    Changes in early morning temperatures are largely driven by changes in solar insolation (clouds). So its hardly surprising he found wind had little effect.

    IMO the Parker studies are based on flawed assumptions and worthless.

  16. Nik says:
    December 29, 2011 at 11:26 am

    There are numerous problems with the Parker study. Amongst the largest is they just assume that wind will always decrease night time warming. Most temperature sensors are at airports. Airports are rarely at the center of cities. As such, if the wind comes from the right direction, it could actually cause cause warming, not cooling.

    They do a poor job of defining “windy”. It is defined as a fraction of the average wind speed for the area being studied.

  17. Tez writes “How can they be sure that the rest of the heating was due to the Greenhouse effect? Have they ruled out the sun’s contribution?”

    What is in the paper is the genuflect to the religion of CAGW. Remember Tom Lehrer’s Vatican Rag. If you put this sort of phrase in the paper, it makes it that much more likely the paper will be published; particularly as, in this case, it tends to provide evidence against CAGW.

  18. A very provocative paper, which uses a good case study of a rapidly urbanising modern economy as the basis for investigation.

    It is also, however, right by the Pacific Ocean and hence any oceanic effects are likely to be more marked than, say, in Mongolia, Southern Siberia or Western Montana. It’d be interesting to see the ‘national temperature curve’ for South Korea to see if there has been any rapid warming post 1977 which may be affected by PDO oscillations etc.

    Any chance of getting the authors to contribute a paper which addresses questions readers of this blog site may raise?

  19. The IPCC declared that their models proved that urban warming has only increased by temperatures by 0.01 degree C over the last century! Shows how much they know! Divide their other results by 77 and you get close to the truth.

  20. “What I wouldn’t give to get it.”

    I am confused as to why it is not in the past 30 or so years of satellite data….

    Of course I have been confused for years as to why you guys have not tried to find the UHI in satellite data anywhere in the world….

    So there is that.

  21. “Pointing to reduced urban aerosols and aerosol seeded clouds as the cause of the urban warming.”

    Why not just fire up the GCMs and find out whether the clouds result in warming or cooling in the Korean Penninsula. Surely they will tell.

  22. Compare the satellite night time illumination of North and South Korea. Isn’t North Korea pathetic? Makes you wonder what that one white dot in North Korea is? Did Kim Jong Un leave his bathroom light on?

  23. I can’t imagine why the South Koreans would be jeopardising their own prosperity by adhering to the AGW mantra. South Korea is a second Japan in terms of rapid industrialisation and modernisation following the obliteration of the Japanese occupation and then the Korean War. A powerhouse that owes its present circumstances to coal and the burning of same. They also have a far greater worry than supposed AGW in the form of a belligerent NK and their proximity to the Chinese. Besides, warmer winters would be beneficial.

  24. Has anyone looked for a correlation of temperature trend for night time illumination measurement instead of population density?

  25. Why not Google/Bing “north korea surface temperatures? There’s data out there, some of it possibly useful.

  26. Joshua Corning says:
    December 29, 2011 at 2:01 pm (Edit)
    “What I wouldn’t give to get it.”

    I am confused as to why it is not in the past 30 or so years of satellite data….

    Of course I have been confused for years as to why you guys have not tried to find the UHI in satellite data anywhere in the world….

    So there is that.
    ################################

    that’s because you cannot find UHI in satellite data.

    UHI has a vertical structure.

    1. At the surface you have SUHI. that is, increases in the SKIN temperature of the urban
    fabric. This temperature is not directly measureable by satellite but can be inferred
    from satelite retrievals. basically, you have to use radiative transfer equations ( the physics that say C02 warms the planet ) to estimate LST ( land surface temp ) from the brightness temperature. The problem is you can only get these pictures when its cloud free and only at certain times of the day and night for particular locations. Still you can get estimates of SUHI MAX, but
    I only know of one study that looked at it over time ( a dissertation )

    2. From the roof top to the surface, you have what is called the urban canopy layer. Air temperature here is the air temp that is sampled by a thermometer 2m off the ground. The air temp here is determined by the land surface temperature and horizontal advection. Satellite cannot “see” this temperature.

    3. from the roof top to the mixing layer you have “boundary layer’ UHI. this probably extends
    a kilometer or 2 into the atomospere. Above the boundary layer, UHI is all mixed away.
    Since the urban area is so tiny ( <1%) of the total surface, it doesnt add anything detectable
    at layers above the UBL.

    So, the trend in temperature above this layer (TLT) are above .2C per decade from 1979-2010, over land. The land surface trends are on the order of .26C to .28C depending on who you believe. So, globally the difference between the trend at 2meters and the trend at 11km or so
    is not that great.

  27. Nik

    ‘How do this compares to this study?”

    good question. The studies are really not caparable.

    different time periods, different methods, different geographical coverage, different stations

    You can’t simply compare a a global study to a regional study.

    Also, note. What you see here is a increase of .6C over 55 years. Or about .1C per decade in a region that is rapidily urbanizing. In china, we see the same thing, although the rate there is more like, .05C decade. In japan, also rapidly urbanizing you have similar figures.

    By comparing the satellite trends (.18- .2C decade) over land, to the surface trends ( .26-.28C)
    you can see that there may be a GLOBAL UHI trend of somewhere between 0 and .1C decade.
    on a GLOBAL basis ( Ps we found .04C per decade globally) REGIONALLY, you will see places like Korea, Japan, China, having bias rates higher than .04C. Latitudinally, you will see that rates in the northern hemisphere are higher than the southern hemisphere.

    So, you basically have apples and oranges. You have to look at

    1. The stations actually used
    2. The time period
    3. whether the study is global or regional or site specific.
    4. The methods
    5. the classification system.

  28. Pitiful. They correlated with rate of population growth and population growth. How about multiplying by GDP per head?
    S Korea in 1954 was dirt poor, ravaged by war. I’ll bet there wasn’t much energy use per head. Look at it now.
    Don’t these people have any smarts?

  29. Here’s something y’all may not know about South Korea

    Land area: 99,260 sq km

    Primary energy use: 255 MTOE (million tons of oil equivalent) per year

    Calorific content of oil: 42 giga joules per TOE

    Primary energy use, joules per year: 1.07e19 joules

    Equivalent constant surface forcing: 3.4 W/m2

    Just sayin’, when you have an industrial economy in a small country, just the burning of the fuel alone can be a significant factor.

    w.

  30. Yep, concrete and asphalt retain daytime heat better than grassland, desert or forest…especially when it is sunny during the day. Next question…

  31. Tez says:
    December 29, 2011 at 10:42 am
    How can they be sure that the rest of the heating was due to the Greenhouse effect? Have they ruled out the sun’s contribution?

    Or any other numerous potential atmospheric oscillations.

  32. RE: DPRK – All one needs to do is count the frozen bodies each year to determine warming or cooling trends. It’s 4deg. F. in Pyongyang as of 30 min. ago. Google Earth weather.

  33. Oh, yeah. If we assume blackbody conditions at 10°C for Korea, 3.4 W/m2 converts by SB to 0.7°C of warming in Korea from fuel use alone.

    w.

  34. LazyTeenager says:
    December 29, 2011 at 11:39 am
    “The 0.6 degrees over 55 years corresponds very well with the global 0.1 degrees per decade warming rate that has been observed. And the 0.8C since 1900.

    The measurement of the UHI in Korean cities has not made that go away. Sorry, the elephant is still in the room.”

    The warming phase in the first half of the 20th century had the same slope as the one during the 1980’s and 1990’s. In the 2000s, warming stopped even though CO2 kept rising. So, the Earth is not showing any different behaviour than it did before 1950. The elephant in the room is that all the UNFCCC’s and UNIPCC’s efforts to demonstrate a change in this behaviour have amounted to nothing.

  35. 29 Dec: WSJ: RYAN TRACY And JIM CARLTON: California Low-Carbon Fuel Rules Halted
    The decision puts on hold a major portion of California’s effort to cut greenhouse-gas emissions, at a time when the most-populous state’s stance has taken on extra importance nationwide because of a stalemate in Washington over greenhouse-gas legislation.
    The judge’s move means that refiners and ethanol producers, which previously could have been faced with having to buy credits when importing oil and ethanol into California to comply with the rules, will now be freed of those obligations…
    Judge O’Neill hasn’t issued a final decision on the case, but on Thursday he barred California from enforcing the rules while the lawsuit continues…
    David Pettit, a lawyer for the Natural Resources Defense Council, which intervened in the case, said other states considering similar rules “would likely be scared off trying to do what California did if the decision is upheld.”…
    “It is not surprising that the oil industry is attacking these programs, but like previous attacks in the courts and at the ballot box, we expect this one ultimately to fail,” said Trip Van Noppen, president of Earthjustice, a nonprofit environmental law firm based in San Francisco.

    http://online.wsj.com/article/SB10001424052970204720204577128972816077652.html?mod=googlenews_wsj

  36. Tez says:
    December 29, 2011 at 10:42 am
    How can they be sure that the rest of the heating was due to the Greenhouse effect? Have they ruled out the sun’s contribution?
    ==========================

    Please send money … contribution of the sun doesn’t attract money :)

  37. Willis, using South Korea’s 81,000,000 barrels of imported oil in a year * 5,780,000 btu’s per barrel * 1055 joules per btu / 365 / 24 / 60 / 60, I get about 16GW average power. I spread that over the 99,260,000,000 square meters to get 0.16 W/m2 (your number seems to be 20x too high).

  38. Willis Eschenbach says:
    December 29, 2011 at 3:33 pm
    Here’s something y’all may not know about South Korea

    Land area: 99,260 sq km

    Primary energy use: 255 MTOE (million tons of oil equivalent) per year

    Calorific content of oil: 42 giga joules per TOE

    Primary energy use, joules per year: 1.07e19 joules

    Equivalent constant surface forcing: 3.4 W/m2

    Just sayin’, when you have an industrial economy in a small country, just the burning of the fuel alone can be a significant factor.

    w.

    This is an interesting calculation. I’ve done the same for the U.S. and in urban areas the forcing due to energy use (it’s all degraded to heat in the end) is a significant fraction of the observed warming.

  39. This is an interesting, if unintended, experiment. It’s nice to see totalitarianism being useful for something after all.

  40. Eric (skeptic) says:
    December 29, 2011 at 4:35 pm
    Willis, using South Korea’s 81,000,000 barrels of imported oil in a year * 5,780,000 btu’s per barrel * 1055 joules per btu / 365 / 24 / 60 / 60, I get about 16GW average power. I spread that over the 99,260,000,000 square meters to get 0.16 W/m2 (your number seems to be 20x too high).

    The use is not distributed uniformly over Korea. It is concentrated in urban areas. I did the same calculation for just the larger urban areas of the U.S. and found a result that is a fair fraction of the forcing implied global warming.

  41. What this study shows is urban warming was approximately double non-urban warming.

    A different conclusion from the findings is that a local/regional effect causing warming is twice as strong in the urban areas compared to non-urban areas.

    Hint – reduction in aerosols.

  42. KevinUK says:
    December 29, 2011 at 4:58 pm
    What cities are all those lights off the South Korean east coast coming from? Why is there so much light in the North West?

    That is Seoul–a large urban area right next the the DMZ.

  43. KK, use Google maps and zoom in to city level and yes you can see Seuol and a number of other cities/towns in the NW but there’s also lots of ‘greenery’ in between them so why so much light?

    More importantly when did tehSouth Koreans decide to build all those floating cities off their east coast?

  44. KevinUK, squid fishing nets. They use lots of small lanterns. Those are the brightly lit offshore areas. After the first manned orbits in the 1960s, the two brightest areas on our planet were observed to be the Persian Gulf (flaring gas) and the Sea of Japan (squid fishing nets).

  45. As I understand the UHI issue, it is not actually a matter of the real heat contributed by cities to the globe, which is trivial, but of the effect of urbanization on temperature measurements, leading to overestimation of nearby/wider temperatures.

    So is this claimed effect of UHI supposedly a warming of SK as a whole, or a biasing of the readings, which needs to be backed out?

  46. Philip Bradley says:
    December 29, 2011 at 5:04 pm (Edit)
    What this study shows is urban warming was approximately double non-urban warming.

    A different conclusion from the findings is that a local/regional effect causing warming is twice as strong in the urban areas compared to non-urban areas.

    Hint – reduction in aerosols.

    #####################################

    it depends on the aerosols. But yes, some aerosols released in the city can cause a local
    warming, however, it’s not been identified as a major contributor in all cases.

  47. Wow, between UHI effects and the “greenhouse effect” seems there’s little left for ocean cycles or solar cycles. Suggest they check their numbers and assumptions…

  48. “This is an interesting calculation. I’ve done the same for the U.S. and in urban areas the forcing due to energy use (it’s all degraded to heat in the end) is a significant fraction of the observed warming.”

    it depends on the actual configuration of the LCZ. In places like downtown tokoyo anthropogenic heat can be as much as 50% of the effect in certain seasons. You cannot tell simply by looking at national figures but you have to look at the energy used in the vicinity of the station versus other factors.

    Not simple

  49. Steve Mosher,

    Reductions in aerosols and the consequent reduction in aerosol seeded clouds affects in particular Tmin, especially Tmin in winter.

    This is because Tmin is sensitive to changes in early morning insolation and in winter the effect is stronger due to the longer period that solar radiation passing thru the atmosphere at a low angle prior to Tmin is affected by the presence/absence of clouds. Tmin occurs later after dawn in winter than in summer.

    I think you will find that most of the ‘warming’ in S Korea is in Tmin, especially in the winter.

    Note this mechanism is separate To UHI.

    The industrialization of S Korea has completely eliminated the domestic burning of coal and biomass which would have been the primary means of heating and cooking at the start of the study period (1950s) and the major source of aerosols. Its a common misconception that industrialization increases aerosols. It doesn’t. It progressively reduces them, primarily by replacing domestic burning of coal/biomass with electricity/gas.

  50. So UHI is the biggest part, and the other part is all the adjustments cooking the books, er, global warming ;-)

    Looks to me like we’ve got a nice paper there…

  51. Has anyone looked at the air temperatures recorded at the tidal stations at the 14 sites around Australia. The data at the National tidal center looks at first glance to suggest no warming of the air temperatures at these sites for up to 18 years. Could someone work out a trend line for me ,as the BOM will not do it. Could the data be put up on this site—-

  52. Eric (skeptic) says:
    December 29, 2011 at 4:35 pm

    Willis, using South Korea’s 81,000,000 barrels of imported oil in a year * 5,780,000 btu’s per barrel * 1055 joules per btu / 365 / 24 / 60 / 60, I get about 16GW average power. I spread that over the 99,260,000,000 square meters to get 0.16 W/m2 (your number seems to be 20x too high).

    First, Eric, thanks for checking my work by running the numbers yourself. It is an excellent habit to have, I commend you and encourage others to do the same.

    I used the total primary energy for Korea from the BP Statistical Review. It breaks down like this, in million tonnes of oil equivalent.

    Fuel Type, MTOE
    Oil, 105.6
    Natural Gas, 38.6
    Coal, 76.0
    Nuclear Energy, 33.4
    Hydro electricity, 0.8
    Renewables, 0.5
    Total, 255.0

    Thus, the oil is less than half of the fuel consumed. So your number starts out low by a factor of 2.

    Next, according to BP the total South Korean oil consumption is 2,384 thousand barrels per day, which is about 870 million barrels per year. This means that your figure is also low by a factor of about 10.

    Between the two, your numbers seem to be about 20x too low.

    Thanks,

    w.

  53. cgh,

    “KevinUK, squid fishing nets. They use lots of small lanterns”

    They must do an awful lot of squid fishing in South Korea then but presumably the North Korean’s aren’t as partial to squid or maybe they fish for their squid in South Korean waters?

    Having said that I found this image on Panoramio – http://www.panoramio.com/photo/51387339

    Funnily enough I first thought it might be down to flaring so Googled ‘South Korea off shore oil fields’ which didn’t turn up any significant hits, so it does look plausible at least that those off shore lights could be down to squid fishing.

  54. Not sure how they look for UHI for HadCrut and Best, but maybe it would make more sense to eliminate any UHI for each set of data first before they extrapolate a temperature for the whole planet?

  55. KevinUK says:
    December 29, 2011 at 4:58 pm

    What cities are all those lights off the South Korean east coast coming from? Why is there so much light in the North West?

    That’s Seoul and surrounding areas. Now you know why a sabre rattling NK scares them so much. Seoul is within artillery range of the DMZ.

  56. GHCN has North Korean data. Also GISS. Most of the series are not updated after 1980, but Pyongyang and some other cities are. While Pyongyang may not be “nights light” urban, it is still a fairly large city.

  57. KevinUK says:
    December 29, 2011 at 5:17 pm
    KK, use Google maps and zoom in to city level and yes you can see Seuol and a number of other cities/towns in the NW but there’s also lots of ‘greenery’ in between them so why so much light?

    More importantly when did tehSouth Koreans decide to build all those floating cities off their east coast?

    Sorry, KevinUK, for some reason I missed the lights out to sea completely. I see that cgh explained them as fishing fleets. Japanese fishing fleets are quite extensive, and have caused UFO scares when observed from the air on trans-Pacific flights.

  58. Bill says:
    December 30, 2011 at 10:25 am

    Not sure how they look for UHI for HadCrut and Best, but maybe it would make more sense to eliminate any UHI for each set of data first before they extrapolate a temperature for the whole planet?

    #########
    that is exactly what best have done.

  59. Philip Bradley says:
    December 29, 2011 at 9:03 pm

    Steve Mosher,

    Reductions in aerosols and the consequent reduction in aerosol seeded clouds affects in particular Tmin, especially Tmin in winter.

    ############
    it depends. It depends upon the type of aerosol, depends on the winds.

    when you have some data on Korean and more than speculation, I’ll read.

    I have no time for armchair science

  60. R. Gates says:
    December 29, 2011 at 8:13 pm

    Wow, between UHI effects and the “greenhouse effect” seems there’s little left for ocean cycles or solar cycles. Suggest they check their numbers and assumptions…

    #####################
    hehe.

    good one. Maybe they will define the LIA out of existence

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