A Twitter thread from Dr. Ryan Maue,
Preliminary temperature data have arrived to wrap up 2020 and limit the most recent "climate decade" in the US.
I quickly recorded the change in mean (daily) temperature 2011-2020 minus 1981-1990.
Lower 48 change in "normals"
ΔTAVG = + 0.32 ° F.
ΔTMIN = + 0.46 ° F.
ΔTMAX = + 0.18 ° F.
That calculation is simply the 30 year change in US temperatures.
Fast thoughts:
The low temperatures in the cities rise dramatically
Overall, US high temperatures, not so much, but again dominated by urban areas.
b / c people live in cities, land use change = local climate change
What should I do?
Global / US / regional / local temperature (climate) changes must always be population weighted, just like the energy industry works.
I see this in Weather + Load Forecast.
This is particularly relevant for people and thermal comfort (cooling) in urban areas.
I used PRISM data from the state of Oregon.
https://prism.oregonstate.edu/
Another comparison option is GRIDMET from @climate_guy
http://www.climatologylab.org/gridmet.html
Per request: Change in maximum temperatures (daily) averaged over the 2 different decades.
Notable changes
Midwest USA – cooling
Western USA – Warming
Physical climate reasons are not evident, as these time slices need a context.
Originally tweeted by Ryan Maue (@RyanMaue) on Jan 3rd, 2021.
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