The 0.3 C figure is
for average global temps, not the continental masses of the NH.
Not exact matches
After that, the hiatus in
global average surface
temps for well over a decade became widely known.
Just think how much easier your argument would be now (correct though it is), if you and the rest of your tribe hadn't been pitching the surface
temps as «
global average temperature»
for so long.
Ocean surface heat and anomalous warmth at the poles were deciding factors
for the new September record with very few regions of the
global ocean surface showing cooler than
average temps and with extraordinary heat at the poles, especially in Antarctica.
From UAH and Dr. John Christy
Global temperatures drop; November still warm
Global climate trend since Nov. 16, 1978: +0.13 C per decade November temperatures (preliminary)
Global composite
temp.: +0.36 C (about 0.65 degrees Fahrenheit) above 30 - year
average for November.
The records I've seen show the
average global temps remained steady at about 22 degrees C
for several million more years.
By annual
global averages, it cost forty cents
for a few years, though Bradley (yep, the MBH one, about ten years before he teamed up with Dr. Mann) found that it depressed summer
temps in our hemisphere by a whopping $ 2.20, one summer.
Note: Excel used to calculate the 3 - year absolute temperature and CO2 level
averages; also used to calculate the moving 36 - month and 360 - month per century acceleration / deceleration trends (Excel slope function) as depicted on chart; the absolute
temps calculated using the HadCRUT4 month anomalies and NOAA's monthly
global mean temperature estimates; and, the 3 - year
average beginning value
for CO2 was offset to a zero starting place.
OWASLT = Sum (
Temp x Mass x Heat Capacity) / Sum (Mass x Heat Capacity), and looking at all pieces of mass components in the atmosphere + mass in the ocean (say down to 2000m or whatever depth would appropriate with respect to available
global data & that should rightfully be included
for an all inclusive weighted
average temperature like this).
However, that's a different question from whether or not
global temps have on
average been rising
for the past 10 or 12 years.
So it is natural
for us to read «Most of the observed increase in
global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations» as being a statement about the proportion of observed degree C
temp increase caused by humans.
Thus zero ice equates to a 0.7 deg C rise in
Global Temps above the 1986 - 2005
average which IPCC AR5draft table 12.2 sees as occurring 2016 - 35 (
for all RCPs bar RPC8.5).
I also fail to see how anyone can make the claim they actually know what the
global average temps reall are
for a given year, decade or century.
This makes
for slight differences in their
global average temps year to year, but they are ALL showing a clear warming trend over many decades.