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RSS Data For Global Temperatures In December

06.01.2015
06.01.2015 09:31 Age: 3 yrs

Latest data from US firm Remote Sensing Systems reveals that atmospheric temperature did not break any records in 2014. It demonstrates the divergence between the satellite measurements of the temperature used by RSS and global surface temperature data which is expected to show that 2014 was a very warm year.

Click to enlarge. Global temperature anomaly map for the lower troposphere in December 2014. Courtesy: RSS

Click to enlarge. Long term trend in monthly average global temperatures for the lower troposphere since 1979. Courtesy: RSS

Click to enlarge.Recent trend in monthly average global temperatures for the lower troposphere. Courtesy: RSS

Click to enlarge. RSS data. Courtesy: RSS


An analysis of US firm Remote Sensing Systems' (RSS) satellite instrument data for the temperature of the lower troposphere shows that 2014 was the sixth warmest year on record.

This means that the so called pause in global warming has continued through 2014 on the basis of RSS data for atmospheric temperatures. Since 1979 the long term trend in RSS data shows an increase in global atmospheric temperatures of 0.12oC per decade although this has flattened in recent years.

The global average temperature anomaly, or variance to the long-term average, for the lower troposphere in 2014 was 0.26oC compared with an anomaly of 0.55oC for 1998, the warmest year in the RSS data series which stretches back to 1979.

December

RSS data shows that the global average temperature anomaly for the lower troposphere in December 2014 was 0.28oC making December 2014 the seventh warmest December in the satellite archive maintained by the company.

A separate analysis of satellite temperature data for December 2014 performed by the University of Alabama in Huntsville (UAH) is due out shortly. Typically, UAH reports a higher anomaly than RSS but on the basis of 2014 data to November it is unlikely that UAH data will show that 2014 broke any records for atmospheric temperature.

The divergence between the relative warmth of 2014 in terms of atmosphere temperatures and in terms of surface temperature data will prompt questions into the relative merits of satellite and ground based temperature observations and also fuel debate among climate sceptics. There is no widely agreed explanation for the divergence.

Here is a list of the 10 warmest years compiled using the RSS dataset with the respective temperature anomaly in degrees C:

Warmest years (1979-2014)
(Warmer than seasonal norms)

1 1998 0.55

2 2010 0.47

3 2005 0.33

4 2003 0.32

5 2002 0.31

6 2014 0.26

7 2007 0.25

8 2001 0.25

9 2006 0.23

10 2009 0.22

Here is a list of the 10 warmest Decembers on the RSS dataset with the respective temperature anomaly in degrees C:

Warmest Decembers (1979-2014)
(Warmer than seasonal norms)

1 2003 0.44

2 1987 0.35

3 1998 0.31

4 1997 0.30

5 2001 0.29

5 2006 0.29

7 2014 0.28

8 2010 0.21

9 2002 0.20

9 2009 0.20

Source

RSS data here.