UAH Global Temperature Update for January 2019: +0.37 deg. C

February 1st, 2019 by Roy W. Spencer, Ph. D.

The Version 6.0 global average lower tropospheric temperature (LT) anomaly for January, 2019 was +0.37 deg. C, up from the December, 2018 value of +0.25 deg. C:


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, and so has the distinction between calendar months

Various regional LT departures from the 30-year (1981-2010) average for the last 13 months are:

YEAR MO GLOBE NHEM. SHEM. TROPIC USA48 ARCTIC AUST
 2018 01 +0.26 +0.46 +0.06 -0.11 +0.59 +1.36 +0.43
 2018 02 +0.20 +0.25 +0.16 +0.04 +0.92 +1.19 +0.18
 2018 03 +0.25 +0.40 +0.10 +0.07 -0.32 -0.33 +0.60
 2018 04 +0.21 +0.32 +0.11 -0.12 -0.00 +1.02 +0.69
 2018 05 +0.18 +0.41 -0.05 +0.03 +1.93 +0.18 -0.39
 2018 06 +0.21 +0.38 +0.04 +0.12 +1.20 +0.83 -0.55
 2018 07 +0.32 +0.43 +0.22 +0.29 +0.51 +0.29 +1.37
 2018 08 +0.19 +0.22 +0.17 +0.13 +0.07 +0.09 +0.26
 2018 09 +0.15 +0.15 +0.14 +0.24 +0.88 +0.21 +0.19
 2018 10 +0.22 +0.31 +0.13 +0.34 +0.25 +1.11 +0.39
 2018 11 +0.28 +0.27 +0.30 +0.50 -1.13 +0.69 +0.53
 2018 12 +0.25 +0.32 +0.19 +0.32 +0.20 +0.65 +1.19
 2019 01 +0.37 +0.32 +0.42 +0.37 +0.48 -0.18 +1.10

The linear temperature trend of the global average lower tropospheric temperature anomalies from January 1979 through January 2019 remains at +0.13 C/decade.

The UAH LT global anomaly image for January, 2019 should be available in the next few days here.

The new Version 6 files should also be updated at that time, 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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