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Man Based Global Warming....

Discussion in 'Environmental Discussion' started by dbermanmd, Dec 22, 2008.

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  1. Celtic Blue

    Celtic Blue New Member

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    Area measurements aren't particularly heplful. Give me volume, then we have something reasonable to start with. The Rio Grande can be quite wide and a few inches deep...but I wouldnt compare it to rivers equally as wide and many feet deep.

    What really matters is the total system energy change (global). I expect cold weather pushing south (northern hemisphere) to actually warm the upper latitudes for example if it cools the southern latitudes. Getting an accurate energy balance between the ocean, surface, air temps, as well as vapor loads, seems rather non-trivial to me over short time spans.

    I'm at a disadvantage in that I don't know the calculated enthalpy differences due to various global factors in the course of a normal/average year or normal variation in a given year. That makes it difficult for me to make qualitative judgments in short (annual) time horizons.
     
  2. dbermanmd

    dbermanmd New Member

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    you are truly mistaken my friend. there is obviously a herd mentality when it comes to man based global warming - cult like.

    i have always been suspicious of cults and herds .... i usually assume that they are wrong and that other things in life it mimics a pendulum that corrects over time finding a middle ground.

    i believe in the 1970's time magazine and lots of others were worried about global cooling,,, now a few short decades later,,, global warming....

    i find it hard to believe that we can accurately predict the climate or the effects man or CO2 has on it when we consider how complex this planet is,,, how many facts we do not understand have to have major impact on our climate,,,,

    i find it hard to believe that even the most sophisticated companies that try to design metals and other conductive substances that can control the environment of their experiments to the Nth degree have trouble creating superconductive substances,,, and yet we can create math models that predict the environmental impact of mankind on a plant of this size.

    yes, color me a skeptic,,, but do NOT color my mind closed. you have yet to convince me that we are the basis of global warming. and for sure,,, i am not ready to support measures that will cause tremendous economic dislocations to supposedly fix an issue i believe is "man-made" [excuse the pun].
     
  3. Fibb222

    Fibb222 New Member

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    There are certainly a number of cult like herds out there (Christians for example). This is as far away from that as you can get - WHY? because scientific data has the ultimate say as to what we "believe" about the AGW hypothesis. We aren't relying on some charismatic emperor expert with empty words.
     
  4. MegansPrius

    MegansPrius GoogleMeister, AKA bongokitty

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    Doran also has a full page on his web site detailing the distortion of his data. It makes for interesting reading.
    Peter T. Doran | Dr. Peter Doran, Associate Professor, University of Illinois at Chicago

    But I was most amused by his conclusion:
    1. It has always amazed me that skeptics of climate warming are quite ready to distrust 99% of the scientific community, but they immediately trust me only because I wrote a paper they "thought" supported their argument.

    2. My favorite argument from global warming critics is "it's been warmer than this in the past" or "temperatures fluctuate all the time". But how do they know this? Because of the scientific evidence. So why do they question everything said by climate scientists concerning modern climate??


     
  5. Alric

    Alric New Member

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    If you choose not to believe the best available information you are being close-minded. Open-minded means accepting the best available information no matter where it takes you.
     
  6. hyo silver

    hyo silver Awaaaaay

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    A cult?!!! :pound:

    You can either accept reality or live in denial. The choice is yours.
     
  7. MegansPrius

    MegansPrius GoogleMeister, AKA bongokitty

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    More news out today:

    Press report (BBC):
    New evidence on Antarctic warming
    The continent of Antarctica is warming up in step with the rest of the world, according to a new analysis.


    Scientists say data from satellites and weather stations indicate a warming of about 0.6C over the last 50 years.

    Writing in the journal Nature, they say the trend is "difficult to explain" without the effect of rising greenhouse gas levels in the atmosphere.

    Meanwhile, scientists in Antarctica say a major ice shelf is about to break away from the continent.
    The Wilkins Ice Shelf is said to be "hanging by a thread" from the Antarctic Peninsula, the strip of land pointing from the white continent towards the southern tip of South America.
    Source Journal Article: Nature: Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year

    [excerpt] An outstanding question in Antarctic climatology has been whether the strong warming of the peninsula has also occurred in continental West Antarctica19. Our results indicate that this is indeed the case, at least over the last 50 years. Moreover, ice-core analyses indicate average warming of West Antarctica over the entire twentieth century27. Although the influence of ozone-related changes in the SAM has been emphasized in recent studies of Antarctic temperature trends, the spatial and seasonal patterns of the observed temperature trends indicate that higher-order modes of atmospheric circulation, associated with regional sea-ice changes, have had a larger role in West Antarctica.

    Mean surface temperature trends in both West and East Antarctica are positive for 1957–2006, and the mean continental warming is comparable to that for the Southern Hemisphere as a whole28. This warming trend is difficult to explain without the radiative forcing associated with increasing greenhouse-gas concentrations. However, the future trajectory of Antarctic temperature change also depends on the extent to which changes in atmospheric composition (whether from greenhouse gases or stratospheric ozone) affect Southern Hemisphere sea ice and regional atmospheric circulation patterns. Improved representation in models of coupled atmosphere/sea-ice dynamics will be critical for forecasting Antarctic temperature change.
     
  8. malorn

    malorn Senior Member

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    Was the satellite data combined with the station data because the satellite data on its own shows cooling over the last 30 years?
     
  9. MegansPrius

    MegansPrius GoogleMeister, AKA bongokitty

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    This research was conducted, as science often is, in order to try to improve upon past research. It does not contradict the East Antarctic cooling shown during the 30 year period of 1969-2000.

    RealClimate:
    Our results do not contradict earlier studies suggesting that some regions of Antarctica have cooled. Why? Because those studies were based on shorter records (20-30 years, not 50 years) and because the cooling is limited to the East Antarctic. Our results show this too, as is readily apparent by comparing our results for the full 50 years (1957-2006) with those for 1969-2000 (the dates used in various previous studies), below.[​IMG]
    2) Our results do not necessarily contradict the generally-accepted interpretation of recent East Antarctic cooling put forth by David Thompson (Colorado State) and Susan Solomon (NOAA Aeronomy Lab). In an important paper in Science, they presented evidence that this cooling trend is linked to an increasing trend in the strength of the circumpolar westerlies, and that this can be traced to changes in the stratosphere, mostly due to photochemical ozone losses. Substantial ozone losses did not occur until the late 1970s, and it is only after this period that significant cooling begins in East Antarctica.
    3) Our paper — by itself — does not address whether Antarctica's recent warming is part of a longer term trend. There is separate evidence from ice cores that Antarctica has been warming for most of the 20th century, but this is complicated by the strong influence of El Niño events in West Antarctica. In our own published work to date (Schneider and Steig, PNAS), we find that the 1940s [edit for clarity: the 1935-1945 decade] were the warmest decade of the 20th century in West Antarctica, due to an exceptionally large warming of the tropical Pacific at that time.
    So what do our results show? Essentially, that the big picture of Antarctic climate change in the latter part of the 20th century has been largely overlooked. It is well known that it has been warming on the Antarctic Peninsula, probably for the last 100 years (measurements begin at the sub-Antarctic Island of Orcadas in 1901 and show a nearly monotonic warming trend). And yes, East Antarctica cooled over the 1980s and 1990s (though not, in our results, at a statistically significant rate). But West Antarctica, which no one really has paid much attention to (as far as temperature changes are concerned), has been warming rapidly for at least the last 50 years.
    Source paper in Nature:
    Recent changes in Antarctic ice-sheet surface temperatures appear enigmatic when compared with global average temperature trends. Although the Antarctic Peninsula is one of the most rapidly warming locations on Earth, weather stations on the Antarctic continent generally show insignificant trends in recent decades1. However, all but two of the continuous records from weather stations are near the coast, providing little direct information on conditions in the continental interior. The widely used weather forecast reanalysis data are known to have errors owing to inconsistent assimilation skill in the satellite and pre-satellite eras3.
    ...
    Previous reconstructions of Antarctic near-surface temperatures have yielded inconsistent results, particularly over West Antarctica, where records are few and discontinuous5, 6, 7. We improve upon this earlier work in several ways. We use two independent estimates of the spatial covariance of temperature across the Antarctic ice sheet: surface temperature measurements from satellite thermal infrared (TIR) observations8, and up-to-date automatic weather station (AWS) measurements of near-surface air temperature
     
  10. TimBikes

    TimBikes New Member

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    Fair enough. I believe Hansen suggests a doubling of CO2 to pre-industrial levels (~560 ppm) risks "dangerous anthropogenic interference". Of course, this assumes positive feedbacks in the climate system play their supposed role, which to me it is not clear they would (water vapor and aerosols being suspect in particular).

    As far as what "gets us there" (below a doubling of CO2), I believe Hansen suggests no less that a complete abandonment of all coal-fired power plants in the U.S. While this isn't necessarily a bad thing, for a lot of reasons, something is going to have to replace that output. I haven't seen the data - so if you have it, please share - will "smart grids, EVs, negawatts, cellulosic ethanol, renewable electricity generation of all kinds and biochar" be able to replace 1/2 of all electrical generation?

    Then of course, there is the question of China that is building something like one coal-fired plant every couple of weeks I think.
     
  11. TimBikes

    TimBikes New Member

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    You forgot: "Although spectacular, such events are not necessarily due to man-made climate change."

    In any case, the study is interesting since it contradicts pretty much all other assessments of Antarctic temperatures to date that I have heard of.
     
  12. malorn

    malorn Senior Member

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  13. Fibb222

    Fibb222 New Member

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    Here's a start: Ontario coal-fired power plant to switch to biomass

    And:

    from

    Greentech Media | Electronomics, or How the Smart Grid Will Power Wealth, Pt. I

    Hopefully if the USA makes big changes in energy the Chinese will follow.
     
  14. MegansPrius

    MegansPrius GoogleMeister, AKA bongokitty

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    You should follow your Baltimore Weather Examiner link back to its NASA source. The scientists (Willis and Wong) that your reporter cites as advocating global ocean cooling come instead to the opposite conclusion.

    Always go to the primary source when you can. Primary sources are your friend. :)

    Correcting Ocean Cooling : Feature Articles

    Correcting Ocean Cooling
    Not surprisingly, says Willis wryly, that paper got a lot of attention, not all of it the kind a scientist would appreciate. In speaking to reporters and the public, Willis described the results as a “speed bump†on the way to global warming, evidence that even as the climate warmed due to greenhouse gases, it would still have variation. The message didn’t get through to everyone, though. On blogs and radio talk shows, global warming deniers cited the results as proof that global warming wasn’t real and that climate scientists didn’t know what they were doing.
    ...He was looking at a map of global ocean temperatures measured by a flotilla of autonomous, underwater robots that patrol the world’s oceans. The devices—Argo floats—sink to depths of up to 2,000 meters, drift with the currents, and then bob up to the surface, taking the temperature of the water as they ascend. When they reach the surface, they transmit observations to a satellite. According to the float data on his computer screen, almost the entire Atlantic Ocean had gone cold. Unless you believe The Day After Tomorrow, Willis jokes, impossibly cold.
    Oh, no,†he remembers saying.
    “What’s wrong?†his wife asked.
    “I think ocean cooling isn’t real.
    On the opposite side of the country, Takmeng Wong and his colleagues at NASA’s Langley Research Center in Virginia had come to the same conclusion.
    ...
    Smoothing the Bumps

    In mid-2008, however, a team of scientists led by Catia Domingues and John Church from Australia’s CSIRO, and Peter Gleckler, from Lawrence Livermore National Laboratory in California, revised long-term estimates of ocean warming based on the corrected XBT data. Since the revision, says Willis, the bumps in the graph have largely disappeared, which means the observations and the models are in much better agreement. “That makes everyone happier,†Willis says.
    [​IMG]
    The same flaws in the XBT data that affected Willis’ ocean heat maps showed up in the long-term historical trend (light blue). After applying a correction, the historical record shows a relatively steady increase in line with what’s shown by climate models. The remaining short-term variability is as likely to be natural variation, such as El Niño, as noise in the data. (Graph by Robert Simmon, based on data from GODAR.)


    [continues for 4 more pages]
     
  15. thepolarcrew

    thepolarcrew Senior Member

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    Here comes global Cooling again. -14F for Friday. I feel like I am on that chart just posted.
     
  16. richard schumacher

    richard schumacher shortbus driver

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    Careful with that. "Antarctic ice" is not the same as "sea ice". Indeed one should expect that as Antarctica warms up it will *shed* ice, and so there will be more sea ice around it.
     
  17. tripp

    tripp Which it's a 'ybrid, ain't it?

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    Meanwhile, here in CO we could hit 80F tomorrow. The high today is 70F. I think we're setting record highs here.
     
  18. TimBikes

    TimBikes New Member

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  19. malorn

    malorn Senior Member

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    Even on the graph you show the data from the xbt's shows a cooling ocean. Why is that whenever any of these organizations do a "correction" it supports their hypothesis? Where did the data before the xbt's come from?
     
  20. thepolarcrew

    thepolarcrew Senior Member

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    Some one should wrap it in plastic and drag it up to California and siphon it off. If I am not mistaken it once cover 6000 sq miles. A lot of drinking water.
    Antarctica is warming, not cooling: study

    And I thought it got cool here..
    Cooling at places such as the South Pole and an expansion of winter sea ice around Antarctica had masked the overall warming over a continent bigger than the United States where average year-round temperatures are about -50 Celsius (-58.00F).Antarctica is warming, not cooling: study | Science | Reuters
     
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