UAH Global Temperature Update for June, 2011: +0.31 deg. C
By Dr. Roy Spencer
Post-La Nina Warming Continues
The global average lower tropospheric temperature anomaly for June, 2011 increased to +0.31 deg. C (click on the image for a LARGE version):
The Northern Hemisphere, Southern Hemisphere, and and Tropics all experienced temperature anomaly increases in June:
YR MON GLOBAL NH SH TROPICS
2011 1 -0.010 -0.055 +0.036 -0.372
2011 2 -0.020 -0.042 +0.002 -0.348
2011 3 -0.101 -0.073 -0.128 -0.342
2011 4 +0.117 +0.195 +0.039 -0.229
2011 5 +0.133 +0.145 +0.121 -0.043
2011 6 +0.314 +0.377 +0.251 +0.235
I would like to remind everyone that month-to-month changes in global-average tropospheric temperature have a large influence from fluctuations in the average rate of heat transfer from the ocean to the atmosphere. In other words, they are not of radiative origin (e.g. not from greenhouse gases). El Nino/La Nina is probably the most dramatic example of this kind of activity, but there are also “intraseasonal oscillations” in the ocean-atmosphere energy exchanges occurring on an irregular basis, too.
YEARLY temperature averages probably provide a better indication of the existence of radiative forcings on the climate system (whether warming or cooling). Nevertheless, we must remember that even DECADAL time scale (or longer) changes in the ocean circulation could also be involved, which can cause long-term climate change independent of any kind of greenhouse gas (or cosmic ray-induced) radiative forcing. (That last sentence has not been approved by the IPCC…but I don’t really care.)
It is impossible to produce a global average temperature when you have different seasons occurring in the Northern and Southern hemispheres. Observation is one thing. Now we have all
heard of rain shadows. This happens when an area within klms of each other, (sometimes metres) one receives higher rain fall than another. I live about 3300 ft absl in a valley environment. My day and night temps vary by 5 degrees C from my friend who lives in the valley 2 klms from me. She rang me up one day and told me the rain was very heavy and it wasn’t raining where I lived. Heavy and damaging hail occurred in one area where I lived and yet the rest of us didn’t even see one hail stone. On a global context how can anyone say – what happens in one area is characteristic of all areas. And this is Australia mates, not UK or the US of A. By the way, this morning at 11 am I checked my small pond and it had a quarter of inch
ice on it. So don’t think Australia is all the same, we get snow, hoar frost and hail. Yet the majority of our continent wouldn’t. But it is cooling by average temperatures this winter, not only on the alpine regions but even in the centre of Australia.
Roger Carr,
Temperature anomalies change by latitude – the Arctic has warmed much faster than the Equator, for example. There are also differences within latitude bands due to various dynamical phenomena, as well as between land and sea surfaces. Any single location wouldn’t be near adequate for capturing a global signal.
CO2 level is different. CO2 is well-mixed so concentrations are quite consistent around the whole planet. NOAA display both a global record and a Mauna Loa record and there is very little difference between them.
well, that’s my tipping point reached. Sincere thanks for all the information and arguments you guys provided over the years. good luck.
Paul S; you are allowing facts to get in the way of a good $tory.