From Dr. Roy Spencer’s Global Warming Blog
by Roy W. Spencer, Ph.D.
The Version 6 global mean lower troposphere (LT) temperature bias for August 2024 is +0.88°C relative to the 1991-2020 average, a slight increase from the +0.85°C temperature bias for July 2024.
The persistent (abnormal) global average warmth this month was contributed by the Southern Hemisphere. Of the 27 regions we regularly monitor, 5 set record (or near-record) monthly temperature anomalies in August, all due to contributions from the Southern Hemisphere:
Global land: +1.35 degrees C
Southern Hemisphere: +1.87 degrees C
Southern Hemisphere extratropical soil: +2.23 degrees C
Antarctica: +3.31 degrees Celsius (2nd place, previous record was +3.37 degrees Celsius, August 1996)
Australia: +1.80 degrees Celsius.
The linear warming trend since January 1979 is currently at +0.16 C/decade (+0.14 C/decade over the global average ocean area and +0.21 C/decade over the global average land area).
The following table lists the LT spreads by region relative to the 30-year average (1991-2020) over the past 20 months (record highs are highlighted in red):
| YEAR | MO | SPHERE | GROUP. | SEM. | TROPICAL | United States48 | NORTH POLE | Australia |
| 2023 | January | -0.04 | +0.05 | -0.13 | -0.38 | +0.12 | -0.12 | -0.50 |
| 2023 | February | +0.09 | +0.17 | +0.00 | -0.10 | +0.68 | -0.24 | -0.11 |
| 2023 | March | +0.20 | +0.24 | +0.17 | -0.13 | -1.43 | +0.17 | +0.40 |
| 2023 | April | +0.18 | +0.11 | +0.26 | -0.03 | -0.37 | +0.53 | +0.21 |
| 2023 | Maybe | +0.37 | +0.30 | +0.44 | +0.40 | +0.57 | +0.66 | -0.09 |
| 2023 | June | +0.38 | +0.47 | +0.29 | +0.55 | -0.35 | +0.45 | +0.07 |
| 2023 | July | +0.64 | +0.73 | +0.56 | +0.88 | +0.53 | +0.91 | +1.44 |
| 2023 | August | +0.70 | +0.88 | +0.51 | +0.86 | +0.94 | +1.54 | +1.25 |
| 2023 | September | +0.90 | +0.94 | +0.86 | +0.93 | +0.40 | +1.13 | +1.17 |
| 2023 | October | +0.93 | +1.02 | +0.83 | +1.00 | +0.99 | +0.92 | +0.63 |
| 2023 | November | +0.91 | +1.01 | +0.82 | +1.03 | +0.65 | +1.16 | +0.42 |
| 2023 | December | +0.83 | +0.93 | +0.73 | +1.08 | +1.26 | +0.26 | +0.85 |
| 2024 | January | +0.86 | +1.06 | +0.66 | +1.27 | -0.05 | +0.40 | +1.18 |
| 2024 | February | +0.93 | +1.03 | +0.83 | +1.24 | +1.36 | +0.88 | +1.07 |
| 2024 | March | +0.95 | +1.02 | +0.88 | +1.35 | +0.23 | +1.10 | +1.29 |
| 2024 | April | +1.05 | +1.25 | +0.85 | +1.26 | +1.02 | +0.98 | +0.48 |
| 2024 | Maybe | +0.90 | +0.98 | +0.83 | +1.31 | +0.38 | +0.38 | +0.45 |
| 2024 | June | +0.80 | +0.96 | +0.64 | +0.93 | +1.65 | +0.79 | +0.87 |
| 2024 | July | +0.85 | +1.02 | +0.68 | +1.06 | +0.77 | +0.67 | +0.01 |
| 2024 | August | +0.88 | +0.96 | +0.81 | +0.88 | +0.69 | +0.94 | +1.80 |
The full UAH global temperature report, along with the LT global grid anomaly image for August 2024 and more detailed analysis by John Christy, will be available in the coming days. This.
Lower stratosphere:
http://vortex.nsstc.uah.edu/data/msu/v6.0/tlt/uahncdc_lt_6.0.txt
Mesosphere:
http://vortex.nsstc.uah.edu/data/msu/v6.0/tmt/uahncdc_mt_6.0.txt
Troposphere:
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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