He did this by introducing a hundred
year warming curve which, he said, had only one chance in a hundred of happening by pure chance alone.
Not exact matches
«Why should we go another 20
years without knowing whether we're on high [
warming]
curve or the low
curve?»
The top of the
curves are
warmer years caused by El Niño; a weather phenomenon where the Pacific Ocean gives out heat thus
warming the Earth.
BTW, aside from averages, I notice that the seasonal temperature
curve seems to have been pushed forward in time a few weeks, with it statying
warmer or colder longer in the
year.
If we had 200
years of daily climate records for the north pole, like we have for the mid latitudes, then the
curve would be smoother, and a
warmest week could be picked out, if it does not simply plateau.
Cohen et al. have shown two
years ago that it is mainly the recent cold winters in Eurasia that have contributed to the flattening of the global
warming curve (see figure).
Artic climatologists are worried that the knee of the
curve has already been reached on global
warming reaching the positive - feedback stage because the ice loss this
year was so dramatically greater than the trend of previous
years.
That is, roughly, an S - shaped
curve over about 10,000
years, a rise of at least 120 meters and involved about 6C
warming.
First you have to understand that ENSO oscillations — an alternation of
warm El Nino and cool La Nina periods every four - five
years — is present in all temperature
curves.
What both of these temperature
curves show is that virtually all of the past 10,000
years has been
warmer than the present.
Belgium objected to using 1998 as a starting
year for statistics, as it was exceptionally
warm and makes the graph look flat — and suggested using 1999 or 2000 instead to give a more upward - pointing
curve.
If you look at any of the temperature
curves, it's pretty obvious that the current bout of
warming is occurring on a scale of 50 - 100
years.
But to bolster his claim of global
warming he manufactured a rising temperature
curve for the eighties and nineties that hides the lack of
warming for those 18
years.
Planetary
warming isn't a smooth upward
curve every
year.
There was an 18
year cessation of
warming in the eighties and nineties that was covered up by a fake global
warming in official temperature
curves.
The 15 -
year figure I obtained is how far I had to slide rightwards the predicted global
warming curve in Figure 3 so as to make its curvature match that of the observed global
warming curve in Figure 2.
If the data for the past ten thousand
years was
curve fit, it would show a
warm max about now with a cool period to follow.
I played with the four magic parameters (no wiggling ears) within the allowed ranges and found if you put the kabosh on the 15 -
year Hansen delay, CO2 start at 270ppm instead of 287ppm, 1.1 C / doubling, you can get a lovely
curve with 0.6 C
warming since 1850 instead of 0.8 C. I didn't try but I'm pretty you can then tweak the filter to get the millikelvin accurate shape.
This resulted in a linear
curve that matches the observed
warming for over 100
years.
The top 10
warmest years on record have all come since 1998 as a result...» Here we have a demonstration of basic ignorance about the global temperature
curve.
The Climactic Optimum, 4000
years ago was 3 to 4 F degrees
warmer than it is now (One of the big
curves on the
curve) and that was paradise not disaster.
The first figure: temp
curve would fit better if the early
years hadn't been «homogenized» downward and the recent
years «homogenized upward» to accenuate the appearance of
warming and try to get rid of the flat period of the last 17
years and the 1934 record high
year.
The fact that this is a line, not a
curve with increasing slope with increasing
years shows that there has not been any change in the global
warming rate.
Considering the recent evidence that climate models have failed to predict the flattening of the global temperature
curve, and that global
warming seems to have ended some 15
years ago, the work of the NIPCC is particularly important.»
What is left of his original 100
year warming after this amputation is a see - saw temperature
curve, 25
years of cooling followed by 23
years of
warming.
The so - called «hockey stick»
curve — a graph my co-authors and I published a decade - and - a-half ago showing modern
warming in the Northern Hemisphere to be unprecedented for at least the past 1,000
years — is one among other areas of climate science where the evidence has become ever more compelling.
The suggestion that recent
warming is anthropogenic due to divergence from a simple 60/20
year curve fit over a mere 100
years ignores prior divergence from both competing models of distantly past temperature, one being a hockey stick that shows a slow decline instead of incline prior 1850 and the other showing two similar «non-cyclical» spikes in the Roman and medieval periods.
So we said, let's just sorta take the whole range that we see from sorta
warmest end to coldest end and kinda make a Bell
curve appears [sic] what temperatures have done over the past 10,000
years.
The 60 -
year running temperature trend, the backbone of the
warming, is very suggestive of the CO2
curve.
Superimposed on this trend line is a cyclical
curve resembling a sine
curve, with an amplitude of somewhere around + / - 0.2 C and a total
warming / cooling cycle time of around 60
years.
Looked at more closely however, it has
warmed and then cooled slightly in a cyclical fashion roughly like a sine
curve on a tilted axis, with a total
warming / cooling cycle time of about 60
years and an amplitude of plus / minus 0.2 C.
That leaves just a see - saw temperature
curve above 40 degrees, consisting of 25
years of cooling followed by 23
years of
warming.
Also, RGB at Duke would scold R.Gates for making the «schtick» «First, the climate now is not
warmer than it was in the Holocene Optimum (do not make the mistake of conflating the high frequency, high resolution «2004 ″ data point with the smoothed low frequency, low resolution data in the
curve — even the figure's caption warns against doing that — for the very good reason that in every 300
year smoothed upswing it is statistically certain that the upswing involved multidecadal intervals of temperatures much higher than the running mean.
Beck's
curve shows a
warm phase 400 BC and the next one 1200 AD — that's 1600
years difference, so it just about fits.
We often compare the 50
year Keeling
curve to recent
warming?
The recent admission by NASA that the GISS temp since 2000 was in error, and the restoration of 1934 as the
warmest year in the last century certainly does not come from your
curve.
40:30 Ice core records, low - latitudes, like hockey stick 42:00 Glacier lengths, hockey stick 42:50 Boreholes, corals 45:50 Forcings, CO2, CH4 47:00 Sunspots 49:00 Volcanoes 50:00 Other reconstructions, new studies 51:40 Spaghetti
curve, look at envelope 54:15 Put spaghetti with hockey stick error bars 56:50 30 -
year averages
warmest, 400
years likely, 1000
years plausible 58:15 end of talk 58:50 MWP likely varied globally 01:01:50 LIA seems more global 01:03:00 Does it have anything to do with AGW?
When the
warming phase starts and ends can be seen as the 21 -
years moving average GMST crosses the secular GMST
curve.
This
year marks not only the release of a clarion IPCC report and the convening of an enormous UN climate conference, but also the 50th anniversary of the Keeling
curve — the longest continuous recording of atmospheric carbon dioxide levels, revealing a gradually rising carbon dioxide profile that helped trigger early concern about global
warming.
The global temperature
curve is essentially a sine
curve with lots of annual (even monthly) ups and downs, an underlying amplitude of around 0.23 C and a multi-decadal half - cycle of around 30
years on a tilted axis with a long - term
warming trend of around 0.04 C per decade.