Latest Global Average Tropospheric Temperatures 1979 to June 2017

Weather Eye
with John Maunder

The chart below shows that since 1979, when reliable satellite observations became available, there has been little overall trend in the average tropospheric temperatures, apart from a period of somewhat milder temperatures since about 1997, and two significant warm periods associated with the El Nino events in 1998 and 2015-16.

 

The latest global average temperatures of the troposphere updated to June 2017– observed from US National Oceanic and Atmospheric Administration satellites – are computed by the University of Alabama at Huntsville in the United States. The data shows variations from the 30 year period 1981-2010.

Since 1979, NOAA satellites have been carrying instruments which measure the natural microwave thermal emissions from oxygen in the atmosphere. The intensity of the signals these microwave radiometers measure at different microwave frequencies is directly proportional to the temperature of different, deep layers of the atmosphere. Every month, researchers at the University of Alabama   (Dr John Christy and  Dr Roy Spencer) update global temperature datasets that represent the piecing together of the temperature data from a total of fourteen instruments flying on different satellites over the years.

The graph above represents the latest update; updates are usually made within the first week of every month. Contrary to some reports, the satellite measurements are not calibrated in any way with the global surface-based thermometer records of temperature. They instead use their own on-board precision redundant platinum resistance thermometers calibrated to a laboratory reference standard before launch.

The troposphere is the lowest layer of Earth's atmosphere.

It contains approximately 75 per cent of the atmosphere's mass and 99 per cent of its water vapour and aerosols.

The average depth of the troposphere is approximately 17 km in the middle latitudes.

The tropospheric temperature data for 2011 is January 0.0 degrees Celsius, February -0.02, March -0.10, April +0.12, May +0.14, June +0.32, July +0.38, August +0.33, September +0.29, October +0.12, November +0.12, December +0.10 degrees.

The data for 2012 is: January -0.09 degrees, February -0.12, March +0.11, April +0.29, May +0.29, June +0.37, July +0.28, August +0.34, November +0.28, December +0.20 degrees.

The data for 2013 is: January +0.50 degrees, February +0.18, March +0.20, April +0.10, May +0.07, June +0.30, July +0.17, August +0,16, September +0.37, October +0.29, November +0.19, December +0.23 degrees.

The data for 2014 is: January +0.30 degrees, February +0.18, March +0.17, April +0.19, May +0.33, June +0.31, July +0.30, August +0.20, September +0.30, October +0.37, November +0.33, and December +0.33 degrees Celsius.

The data for 2015 is: January +0.20 degrees C, February +0.18 degrees C, March +0.14 degrees C, April +0.07 degrees C, May +0.30 degrees C, June +0.32 degrees C, July +0.18 degrees C, August +0.22 degrees C, September +0.20 degrees C, October +0.32 degrees C, November +0.40 degrees C, and December +0.48 degrees C.

The data for 2016 is: January +0.55 degrees C,  February +0.83 degrees C, March  +0.73 degrees C, April +0.71 degrees C, May +0.55  degrees, June +0.33 degrees C, July +0.39 degrees C, August +0.38 degrees C, September  +0.44 degrees C, October +0.35 degrees, November +0.40 degrees C, and December +0.24 degrees C.

The data for 2017 is: January +0.31 degrees C, February +0.35 degrees C, March +0.37 degrees C,  April +0.40 degrees C ,  May  +0.47 degrees C , and June  +0.21 degrees C.      

The coolest months since 1979 were September 1984, with minus 0.49 degrees Celsius, and November 1984, with minus 0.42 degrees Celsius.

The warmest months were February 2016 with plus 0.83 degrees C, February and April 1998, both plus 0.76 degrees Celsius, and March 2016 plus 0.73 degrees, and April 2016 plus 0.73 degrees Celsius.

The chart shows the El Nino warming in the 1998 period, and 2015-16, and the Mount Pinatubo, volcanic cooling during 1992-1993.

Details: http://www.drroyspencer.com/latest-global-temperatures/

For further information see:  https://sites.google.com/site/climatediceandthebutterfly/

3 Comments

What

Posted on 15-07-2017 09:28 | By Capt_Kaveman

i have noticed that the weather is very changeable from year to year some hot some with more snow but as NZ goes at some point about 70% of the time it will be windy, i was just glad we had 4 good summers in a row 2012-2015 and are far over due for cyclones apart from the one this year and wet summers

Who are you trying to fool?

Posted on 13-07-2017 13:30 | By ronillian

Hey guys, come on!! It seems like you're trying to tell me that 2+2 doesn't equal 4!!! You'd really have to be in severe denial (or living with a bad case of cognitive dissonance) to think that this graph does not show a significant global warming trend from 1979 till now. This is just laughable!

Why does the emperor still have his clothes

Posted on 11-07-2017 19:33 | By astex

More and more these figures show very little change in the climate over many time periods.Why has a little boy somewhere not finally questioned whether they are actually there when it comes to climate change. All the computer models are more and more being debunked by actual fact and yet we still continue to pour millions of dollares into solving a problem that does not seem to exist. I remember in the 60's all the same outcry about the climate "cooling". That was not real either. Thank you John Maunder for keeping us informed without the sensationalism.

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