The most important thing is that global warming should be seen — precisely — globally, because as it gets cold in a larger area around us, it does not tell
anything about the global temperature.
It may well turn out to be true, but the point is not that science can or has said
anything about global temperatures, the point is that the «scientific» account that Hari gives is intended to make statements about those who would interpret things differently.
Not exact matches
The study shows that by century's end, absent serious reductions in
global emissions, the most extreme, once - in -25-years heat waves would increase from wet - bulb
temperatures of
about 31 C to 34.2 C. «It brings us close to the threshold» of survivability, he says, and «
anything in the 30s is very severe.»
[Response: I suspect another common confusion here: the abrupt glacial climate events (you mention the Younger Dryas, but there's also the Dansgaard - Oeschger events and Heinrich events) are probably not big changes in
global mean
temperature, and therefore do not need to be forced by any
global mean forcing like CO2, nor tell us
anything about the climate sensitivity to such a
global forcing.
In post # 684 you said - «Obviously you've never read
anything about volcanos» effect on
global temperature.
Obviously you've never read
anything about volcanos» effect on
global temperature.
However, I am not persuaded there is
anything unusual
about the
global temperatures of climate.
Though a 1 C rise in
global temperature may not tell us
anything about global climate -
temperature is not really something which effect humans or life, whereas patterns rainfall, would be more relevant than average
global temperature.
There are certainly no available figures that describe the sensitivity of the
global temperature to variations in solar input and without knowing that level of sensitivity as a first step I fail to see how we can know
anything useful
about the sensitivity of the Earth to other influences
They don't have their flight wings yet, so
anything they say
about the causes of
global temperatures and the future of
global temperatures should not be considered valid.
He found that Pinatubo eruption was followed by a
global temperature drop, did not know
anything about ENSO oscillations, and pronounced the observed cooling to be volcanic.
If the
global average
temperature during the YD was only
about 0.6 C cooler than the Holocene Altithermal (see Shakun & Carlson), then it's hard to see how the cold NH / warm SH YD was
anything * other * than an energy redistribution.
When I started looking at this topic the first thing that struck me was just how much time is spent in the blogosphere debating the effects (real or imagined) of
global temperature rise and how little time seemed to be spent on the key evidential science; as though retreating glaciers, arctic sea - ice or coral bleaching said
anything about causality.
If we get to this point, we then have to ask if the system currently used to calculate
global surface
temperatures actually tells us
anything of value
about the heat energy at the surface.
By not rejecting the null hypothesis this does not say
anything about the validity of the null — the null being that there is no trend in
global temperatures since 1995.