18 years as a standard seems odd. It sounds like statistical cherry picking.
If climate change is going to be so horrific, where are the ocean walls being built. One would think that by this time our coasts would look like Holland.
It is 18 years because ... “USCRN data collection began in 2005”. It is NOT statistical cherry picking when they are giving you 100% of the data.
USCRN data collection began in 2005
The system was completed and first operational in 2005.
The scientific standard for a temperature average is 30 years, so USCRN data is not currently recognized as prime and reliable.
It is also unclear from the website if the entire data base includes or excludes Alaska and Hawaii - which could make a significant difference.
Regardless, the data gathering land sites are universally recognized as the most pristine in the world.
Re: "Ocean walls"
Within the last five years, both Bill Gates and Barack Obama have purchased ocean front homes!
That might be the only evidence we need...