UAH Global Temperature Update for June, 2017: +0.21 deg. C

by Roy W. Spencer, Ph. D.

Lowest global temperature anomaly in last 2 years (since July, 2015)

The Version 6.0 global average lower tropospheric temperature (LT) anomaly for June, 2017 was +0.21 deg. C, down from the May, 2017 value of +0.44 deg. C (click for full size version):

Global area-averaged lower tropospheric temperature anomalies (departures from 30-year calendar monthly means, 1981-2010). The 13-month centered average is meant to give an indication of the lower frequency variations in the data; the choice of 13 months is somewhat arbitrary… an odd number of months allows centered plotting on months with no time lag between the two plotted time series. The inclusion of two of the same calendar months on the ends of the 13 month averaging period causes no issues with interpretation because the seasonal temperature cycle has been removed as has the distinction between calendar months.

The global, hemispheric, and tropical LT anomalies from the 30-year (1981-2010) average for the last 18 months are:

YEAR MO GLOBE NHEM. SHEM. TROPICS

2016 01 +0.55 +0.73 +0.38 +0.84

2016 02 +0.86 +1.19 +0.52 +0.99

2016 03 +0.76 +0.99 +0.54 +1.10

2016 04 +0.72 +0.86 +0.58 +0.93

2016 05 +0.53 +0.61 +0.45 +0.71

2016 06 +0.32 +0.47 +0.17 +0.38

2016 07 +0.37 +0.43 +0.30 +0.48

2016 08 +0.43 +0.53 +0.32 +0.50

2016 09 +0.45 +0.50 +0.39 +0.38

2016 10 +0.42 +0.42 +0.41 +0.46

2016 11 +0.46 +0.43 +0.49 +0.36

2016 12 +0.26 +0.26 +0.27 +0.23

2017 01 +0.33 +0.32 +0.33 +0.09

2017 02 +0.39 +0.58 +0.19 +0.07

2017 03 +0.23 +0.37 +0.09 +0.06

2017 04 +0.27 +0.29 +0.26 +0.22

2017 05 +0.44 +0.39 +0.49 +0.41

2017 06 +0.21 +0.32 +0.09 +0.39

NOTE: We have added the Metop-B satellite to the processing stream, with data since mid-2013. The Metop-B satellite has its orbit actively maintained, so the AMSU data from it does not require corrections from orbit decay or diurnal drift. As a result of adding this satellite, most of the monthly anomalies since mid-2013 have changed, by typically a few hundredths of a degree C. The 1979-2017 linear trend remains at +0.12 C/decade.

The UAH LT global anomaly image for June, 2017 should be available in the next few days here.

The new Version 6 files should also be updated in the coming days, and are located here:

Lower Troposphere: http://vortex.nsstc.uah.edu/data/msu/v6.0/tlt/uahncdc_lt_6.0.txt

Mid-Troposphere:http://vortex.nsstc.uah.edu/data/msu/v6.0/tmt/uahncdc_mt_6.0.txt

Tropopause:http://vortex.nsstc.uah.edu/data/msu/v6.0/ttp/uahncdc_tp_6.0.txt

Lower Stratosphere: http://vortex.nsstc.uah.edu/data/msu/v6.0/tls/uahncdc_ls_6.0.txt

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