Tropospheric Temperatures 1979 to July 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 , June  +0.21 degrees C, and July +0.28 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

Tropospheric temperatures

Posted on 24-08-2017 13:48 | By KiwiBuzz

It is not a joke. If you want to compare that graph with the temperatures predicted by the climate models, then you will discover that they predicted that the world current temperatures would be something like 0.5 warmer than it really is.And don't forget that the IPCC themselves admit that 111/114 climate models predicted temperatures above reality. "... an analysis of the full suite of CMIP5 historical simulations (...) reveals that 111 out of 114 realisations show a GMST trend over 19982012 that is higher than the entire HadCRUT4 trend ensemble ...." if you can contradict that, please do so. And if you you can provide solid evidence that man-made carbon dioxide causes dangerous global warming there is a $6000 prize waiting for you at the website of the New Zealand Climate Science Coalition. This

@Ronillian

Posted on 24-08-2017 13:26 | By morepork

I have no dog in the "global warming" fight. I find the evidence generally spun to whatever position the publisher supports. But, in this case, not so. I think you need to understand the statistical definition of "trend"... it doesn't mean what is common usage for it. There is negligible trend upwards (or downwards) in the figures here, so the statement made about this is true. Global warming seems to be axiomatically true, but we have to realize that Geological time is a lot different from the scale we live in, and the figures here only reflect a tiny slice of time as viewed by the planet. Nevertheless, they are what we have, and I could detect no falsehoods in what was said about them. Are you finding deceit because you expected to?

A joke

Posted on 23-08-2017 22:32 | By ronillian

This is laughable global warming denial cloaked in pseudo-science. It's preposterous to take the data , produce this graph which shows a VERY CLEAR UPSWING in temperatures and say that this graph shows "there has been little overall trend in the average tropospheric temperatures". C'mon!! Stick to the facts because this has absolutely NO credibility. Actually not a joke: **Mischievous climate denial**

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