It’s one of those things where some agencies count it as “average surface temp” over <several> weeks, while others count the average over <some bigger number of> weeks. So maybe Australia called it the biggest El Nino several weeks ago, but now some other country is able to agree because more weeks have elapsed.
It’s one of those things where some agencies count it as “average surface temp” over <several> weeks, while others count the average over <some bigger number of> weeks. So maybe Australia called it the biggest El Nino several weeks ago, but now some other country is able to agree because more weeks have elapsed.