Any increase in cloudiness will lead to falling of diurnal mean surface temperature.

云量增加导致日平均地表温度下降。

youdao

Arrhenius predicted that if the carbon dioxide concentration increased, the mean temperature of the surface of the earth would increase, in pretty much the way he said it would.

FORBES: NASA Data Pit Scientific Method Against Climate Astrology

Since then, the concentration of carbon dioxide has in fact increased and the mean temperature of the surface of the earth has increased in pretty much the way Dr. Arrhenius said it would.

FORBES: NASA Data Pit Scientific Method Against Climate Astrology