To start a new trend line from the 1998
temperature point breaks the continuity of the trend.
Not exact matches
For high - heat cooking, coconut and avocado oils are best because they have a higher smoke
point, the
temperature at which the fat or oil begins to
break down due to heat.
The maximum
temperature that a oil will endure before
breaking down is known as the smoke
point.
Smoke
Point — the
temperature at which a lipid begins to
break down to glycerol and free fatty acids.
More to the
point, the PDO -
temperature relationship clearly
breaks down after about 1975 (no surprise there).
If we may assume that the moving speed of a
breaking up
point of a glacier is a good indication for past
temperatures, then have a look at the retreat of the largest Greenland glacier at Illulisat, West Greenland.
Coupling this effect with the increasing Arctic Easterlies, the warmish high altitude Polar
temperatures, the NH 250mb isotherm analysis indicating an abnormal increased deviation of the Northern Jet Stream (http://nomads.ncdc.noaa.gov:9091/ncep/NCEP) and the «
broken» hydroligic changes all seem to
point to a similar process.)
There are however statistical reasons why 1975 is a
break point —
breaking the trend there provides a substantially better fit over the whole record (not true for Aug 1997), and if you look at when anthropogenic effects came out of the «noise» of global
temperatures, it is about the same time (fig 9.5 WG1 AR4).
Gudmanden
points out that cold spring
temperatures recorded at the Automatic Weather Station on Littleton Island likely strengthened the barrier and could delay
break - up of the ice bridge.
During the record -
breaking spring
temperatures in Australia in 2013, Abbott said ``... the thing is that at some
point in the future, every record will be
broken, but that doesn't prove anything about climate change.
But then I was staring at the HadCRUT data and it struck me like a ton of bricks that
break points in surface
temperatures exactly matched transitions to flood and drought regimes in Australia.
For example, to create cement, limestone is heated to very high
temperatures, at which
point it
breaks down and releases CO2.
In other words, it stretches credulity to the
breaking point to believe that the global
temperature trend from 2000 - 2009 could be a full 0.6 °C — more than half a degree Celsius — higher than the
temperature trend for the United States (that is, -.4 C +.2 C).
If that
point is known (yes I know it won't be a sharpt
break between convection and radiation, but let's keep it simple), then the equation above can be used to find the increase in surface
temperature resulting from an isentropic near surface atmosphere.
All it took was the shove of the most recent
temperature surge to push some of these to the
breaking point.
But my
point here is that the narrative that the record -
breaking temperature was not enhanced by an El Niño is wrong.
Better still before KR kindly
pointed to that graph, I had
broken down and endeavoured to digitize the FAR graphs myself and reference
temperature trends over the period prior to 1985 from the FAR graphs.
During this time there have been
break points in the global
temperature trend due to natural changes in forces driving the climate.
The
temperature trends must not be extended past these
break points.
I'm reminded of some accusations when climategate
broke that the New Zealand
temperature record looked fudged, i.e. flat until the adjustments were made, at which
point a warming trend appeared.
As this video
points out, more than 15,000 warm
temperature records were
broken or nearly
broken, with most taking place in the eastern two - thirds of the country, says the National Oceanic and Atmospheric Administration.
The
point they make may be summarized by the following quote: «While in the observations such
breaks in
temperature trend are clearly superimposed upon a century time - scale warming presumably due to anthropogenic forcing, those
breaks result in significant departures from that warming over time periods spanning multiple decades.»
The gridded data is just a translation of the global
temperature field they create (i.e. it
breaks that field into gridded
points).
The
point isn't that it «wasn't measuring what it was supposed to» (as proxies, by their very nature, do not actually measure what we use them to indicate), it was that a formerly reliable correspondence between
temperature and tree - rings
broke down in recent years.
One final
point: Changes that you suggest occur in reanalysis would appear to be gradual and not detectable as those for surface
temperatures where
break (change)
points in the time series are used for adjusting data.
You are confirming the
point made in my original article that some people are determined to «
break» Mann's Hockey Stick regardless of the facts and regardless of independent
temperature reconstructions that show similar results.
Conducted laboratory batches of SBS modified asphalt to target specified ranges of viscosity, softening
point, low -
temperature breaking point, and penetration
point