UAH: Globally, the coolest September in the last 10 years.

From Dr. Roy Spencer:

UAH Global Temperature Update for September, 2018: +0.14 deg. C

Globally, the coolest September in the last 10 years.

The Version 6.0 global average lower tropospheric temperature (LT) anomaly for September, 2018 was +0.14 deg. C, down a little from +0.19 deg. C in August:

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.

This was the coolest September in the last 10 years in the global average.

Some regional LT departures from the 30-year (1981-2010) average for the last 21 months are:

YEAR MO GLOBE NHEM. SHEM. TROPIC USA48 ARCTIC AUST
2017 01 +0.33 +0.32 +0.34 +0.10 +0.28 +0.95 +1.22
2017 02 +0.39 +0.58 +0.20 +0.08 +2.16 +1.33 +0.21
2017 03 +0.23 +0.37 +0.09 +0.06 +1.21 +1.24 +0.98
2017 04 +0.28 +0.29 +0.26 +0.22 +0.90 +0.23 +0.40
2017 05 +0.45 +0.40 +0.49 +0.41 +0.11 +0.21 +0.06
2017 06 +0.22 +0.33 +0.10 +0.39 +0.51 +0.10 +0.34
2017 07 +0.29 +0.31 +0.28 +0.51 +0.61 -0.27 +1.03
2017 08 +0.41 +0.40 +0.42 +0.46 -0.54 +0.49 +0.78
2017 09 +0.54 +0.51 +0.57 +0.54 +0.29 +1.06 +0.60
2017 10 +0.63 +0.67 +0.59 +0.47 +1.21 +0.83 +0.86
2017 11 +0.36 +0.34 +0.38 +0.27 +1.35 +0.68 -0.12
2017 12 +0.42 +0.50 +0.33 +0.26 +0.45 +1.37 +0.36
2018 01 +0.26 +0.46 +0.06 -0.11 +0.59 +1.36 +0.42
2018 02 +0.20 +0.25 +0.16 +0.03 +0.92 +1.19 +0.18
2018 03 +0.25 +0.40 +0.10 +0.07 -0.32 -0.33 +0.59
2018 04 +0.21 +0.31 +0.11 -0.12 0.00 +1.02 +0.69
2018 05 +0.18 +0.41 -0.05 +0.03 +1.93 +0.18 -0.40
2018 06 +0.21 +0.38 +0.04 +0.12 +1.19 +0.83 -0.55
2018 07 +0.32 +0.42 +0.21 +0.29 +0.51 +0.29 +1.37
2018 08 +0.19 +0.21 +0.17 +0.12 +0.06 +0.09 +0.25
2018 09 +0.14 +0.15 +0.14 +0.24 +0.88 +0.21 +0.18

The linear temperature trend of the global average lower tropospheric temperature anomalies from January 1979 through September 2018 remains at +0.13 C/decade.

The UAH LT global anomaly image for September, 2018 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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ren
October 3, 2018 10:55 am

Winter is in the southern hemisphere. Ice extent in the Antarctic is growing.
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ren
October 3, 2018 10:57 am

The first major snowstorm in the Rocky Mountains is approaching.

Joe Banks
October 3, 2018 11:10 am

All I see is the AMO

ResourceGuy
Reply to  Joe Banks
October 3, 2018 12:09 pm

Bingo

ResourceGuy
Reply to  Joe Banks
October 3, 2018 12:14 pm

Yes, as the only long cycle in a world of little statistical movement and other shorter-term cycles the AMO is the logical story by subtraction.

ren
October 3, 2018 11:19 am

The level of galactic cosmic rays is the highest since 2009.
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October 3, 2018 1:31 pm

BBC weather man:
“Heaviest October snowfall in Calgary in 60 years”

dh-mtl
Reply to  vukcevic
October 3, 2018 2:48 pm

Could the record, early October snow in Calgary be related to the solar minimum.

Reply to  dh-mtl
October 3, 2018 3:15 pm

Yes, if regularly repeated over next 4 -5 years, very uncertain just for one off
https://www.thenewamerican.com/tech/environment/item/30214-nasa-sees-climate-cooling-trend-thanks-to-low-sun-activity

bit chilly
Reply to  dh-mtl
October 3, 2018 4:41 pm

depends who you ask. if you ask the climateriat it will be due to the anthropogenic component of atmospheric co2 as are all climate phenomena. you obviously didn’t get the memo 😉

Anthony Banton
Reply to  dh-mtl
October 4, 2018 8:40 am

No it’s “related” to this…..

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An anomalously warm Arctic with the cold spilling south into Canada.
Lot of “red” on that map.

This has been a feature of recent Autumns, and indeed of winters since 2011.

http://ocean.dmi.dk/arctic/meant80n.uk.php

Steven (back in KY)
October 3, 2018 4:49 pm

WOW, Obama’s plan did work and now Trump will reverse it…. 😉

DWR54
October 7, 2018 1:58 am

The divergence between the UAH and RSS TLT monthly temperature anomalies for September 2018 is one of the largest for any month on record. Both set to UAH’s preferred 1981-2010 anomaly base, UAH is 0.14 C against 0.35 C in RSS. The divergence between the 2 data sets, which process information from more or less the same sources, has been pronounced since 2001 and is increasing at a rate of 0.06 C per decade. At least one of these two producers is wrong. RSS is in much better agreement with the surface data since 2001.

Anthony Banton
Reply to  DWR54
October 8, 2018 8:56 am

Also, post ’98 the AMSU sensor onboard NOAA15 shows a cooling trend relative to predecessor MSU on NOAA14 and relative to radiosonde.
The RSS group partially corrected for it (split the difference). But the UAH team believed the newer one to be of “Cadillac quality” and so have presumed it correct.
They are both wrong (relative to radiosonde) but RSS a little less so.

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