• Wisely@lemm.eeEnglish
    93·
    2 years ago

    Hey so American here. How much exactly are these increases in temp in fahrenheit? Been too embarrassed to ask for years now whenever climate change is mentioned and searching hasn’t clarified it for me.

    I am getting 4 C is 39.2 F in conversion calculators. But that seems like way too much of an increase? That’s like the difference between summer and early winter.

    • icedterminal@lemmy.worldEnglish
      14·
      2 years ago

      For every 1 degree Celsius, it’s 1.8 deg Fahrenheit.

      A rise in temperature of 4 degrees Celsius is 7.2 degrees Fahrenheit.

    • DerPlouk@lemm.eeEnglish
      141·
      2 years ago

      You’ve converted the absolute value, not the delta.

      The quickest in your head conversion of a delta °C --> delta °F is to simply multiply by 2. +4°C --> +8°F

      To be accurate, remove 1/10th of the °C value before the multiplication. +4°C --> (4 - 0.4) = 3.6 —> +7.2 °F

      For absolute values, I personally do, for a quick ‘in your head’ approximation the other way round (°F --> °C) :

      1. remove 32 °F (78°F --> 46)
      2. divide by 2 (46 --> 23°C; I may stop there for a very rough approximation)
      3. add 1°C per decade (if you got 23°C, add 2°C --> 25°C; I usually stop there)
      4. add 0.1°C per unit (25 --> 25.5°C; it’s not the exact result but not too far)