Tag: December

UAH Global Temperature Update for December, 2023: +0.83 deg. C

The Version 6 global average lower tropospheric temperature (LT) anomaly for December, 2023 was +0.83 deg. C departure from the 1991-2020 mean, down from the November, 2023 anomaly of +0.91 deg. C.

From Roy Spencer, PhD.

January 3rd, 2024 by Roy W. Spencer, Ph. D.

2023 Was the Warmest Year In the 45-Year Satellite Record

The Version 6 global average lower tropospheric temperature (LT) anomaly for December, 2023 was +0.83 deg. C departure from the 1991-2020 mean, down from the November, 2023 anomaly of +0.91 deg. C.

The 2023 annual average global LT anomaly was +0.51 deg. C above the 1991-2020 mean, easily making 2023 the warmest of the 45-year satellite record. The next-warmest year was +0.39 deg. C in 2016. The following plot shows all 45 years ranked from the warmest to coolest.

The linear warming trend since January, 1979 still stands at +0.14 C/decade (+0.12 C/decade over the global-averaged oceans, and +0.19 C/decade over global-averaged land).

It might be partly coincidence, but the +0.51 deg. C number for 2023 from satellites is the same as the surface air temperature estimate from the NOAA/NCEP/NCAR Climate Data Assimilation System (CDAS). Note that the CDAS estimate is only partly based upon actual surface air temperature observations… it represents a physically consistent model-based estimate using a wide variety of data sources (surface observations, commercial aircraft, weather balloons, satellites, etc.). [UPDATE: it appears the CDAS anomalies are not relative to the 1991-2020 base period… I recomputed them, and the CDAS anomaly appears to be +0.45 deg. C, not +0.51 deg. C]:

Various regional LT departures from the 30-year (1991-2020) average for the last 24 months are:

YEARMOGLOBENHEM.SHEM.TROPICUSA48ARCTICAUST
2022Jan+0.03+0.07+0.00-0.23-0.12+0.68+0.10
2022Feb+0.00+0.02-0.01-0.24-0.04-0.30-0.49
2022Mar+0.16+0.28+0.03-0.07+0.23+0.74+0.03
2022Apr+0.27+0.35+0.18-0.04-0.25+0.45+0.61
2022May+0.18+0.25+0.10+0.02+0.60+0.23+0.20
2022Jun+0.07+0.08+0.05-0.36+0.47+0.33+0.11
2022Jul+0.36+0.37+0.35+0.13+0.85+0.56+0.65
2022Aug+0.28+0.32+0.25-0.03+0.60+0.51+0.00
2022Sep+0.25+0.43+0.06+0.03+0.88+0.69-0.28
2022Oct+0.32+0.44+0.21+0.05+0.17+0.94+0.05
2022Nov+0.17+0.21+0.13-0.16-0.50+0.52-0.56
2022Dec+0.05+0.13-0.02-0.34-0.20+0.80-0.38
2023Jan-0.04+0.05-0.13-0.38+0.12-0.12-0.50
2023Feb+0.09+0.17+0.00-0.10+0.68-0.24-0.11
2023Mar+0.20+0.24+0.17-0.13-1.43+0.17+0.40
2023Apr+0.18+0.11+0.26-0.03-0.37+0.53+0.21
2023May+0.37+0.30+0.44+0.40+0.57+0.66-0.09
2023June+0.38+0.47+0.29+0.55-0.35+0.45+0.07
2023July+0.64+0.73+0.56+0.88+0.53+0.91+1.44
2023Aug+0.70+0.88+0.51+0.86+0.94+1.54+1.25
2023Sep+0.90+0.94+0.86+0.93+0.40+1.13+1.17
2023Oct+0.93+1.02+0.83+1.00+0.99+0.92+0.63
2023Nov+0.91+1.01+0.82+1.03+0.65+1.16+0.42
2023Dec+0.83+0.93+0.73+1.08+1.26+0.26+0.85

The full UAH Global Temperature Report, along with the LT global gridpoint anomaly image for December, 2023, and a more detailed analysis by John Christy, should be available within the next several days here.

The monthly anomalies for various regions for the four deep layers we monitor from satellites will be available in the next several days:

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

Climate Crisis! Hottest Xmas Since 2016!

The Met Office was desperate to declare the warmest Xmas on record – sadly all they could claim was the warmest since 2016!

From NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

The Met Office was desperate to declare the warmest Xmas on record – sadly all they could claim was the warmest since 2016!

For most, of course, such things are just a bit of fun. But for the Met Office, it is a chance to push their global warming propaganda.

Never mind the fact the 25th December has no more significance than any other day in the month.

And, as usual, they try to find significance in one day at Exeter being warmer than some other place in years past.

If you want to present an objective analysis, you must use data from the same location or other source. Otherwise you are simply comparing apples and oranges.

The obvious database is the CET, and this gives the lie to claims that our climate is somehow changing rapidly, at least in December.

The chart below only runs to 2020 and shows the highest December temperature recorded each year since 1900. There is little sign of temperatures shooting up, other than the outlier in 2015. What is more noticeable is that exceptionally cold Decembers used to be more common – in 1933, for instance, daytime temperatures never got above 6.4C:

https://www.ecad.eu/indicesextremes/index.php

The highest temperature this month is 13.4C, which is unexceptional by any standard. The last two Decembers were 14.1C and 13.5C.

The mild weather this Xmas is just that – WEATHER. And it is just the same weather we get at times during most years in December, typically a southwesterly airflow.