UAH Global Temperature Update for March 2020: +0.48°C
April 1st, 2020 by Roy W. Spencer, Ph. D.
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for March, 2020 was +0.48 deg. C, down substantially from the February, 2020 value of +0.76 deg. C.
The northern extratropics (poleward of 20 deg. N) experienced the 12th largest drop in tropospheric temperature out of the 495 months of the satellite record. For those interested in speculating regarding reasons for this, it could not be from reduced CO2 emissions from the response to the spread of COVID-19; to the extent that recent warming has been due to more CO2 in the atmosphere, the radiative forcing from extra CO2 would not change substantially even if all CO2 emissions stopped for a full year.
Another possibility is reduced air travel reducing the amount of jet contrails in the upper troposphere, which I am not going to discount at this point.
The linear warming trend since January, 1979 remains at +0.13°C/decade (+0.12°C/decade over the global-averaged oceans, and +0.18°C/decade over global-averaged land).
Well at least Roy Spencer at the University of Alabama has also noticed the fall in global temperatures during March like I have. I like the speculation he offers about the cause. It looks like the coronavirus is holding up the HadCRUT4 data for February.