I think that’s because that’s when we started having weather satellites that could take consistent measurements.
I really find it hard to believe you can compare temperature measurements “globally” before 1950s with any sort of consistency or accuracy. Today’s infrared thermometers for fevers have a 2F accuracy. You’re telling me that you can calculate temperatures from around the world pre-1950s and trust that it’s consistent and accurate?
I really find it hard to believe you can compare temperature measurements “globally” before 1950s with any sort of consistency or accuracy. Today’s infrared thermometers for fevers have a 2F accuracy. You’re telling me that you can calculate temperatures from around the world pre-1950s and trust that it’s consistent and accurate?