You said, 夏天是极地和赤道温差最大的时候. Could you do a bit more research on this claim?
-sailor(Ocean & Mountain);
2021-2-10(#13515057@0)
A polar vortex strengthens in the winter and weakens in the summer because of its dependence on the temperature difference between the equator and the poles
-mikesmith(老猫);
2021-2-10(#13515078@0)
Ecuador is on the equator. The temperature stays almost the same year around. e.g. Esmeraldas, January: 22-29c; July: 22-29c. However, North Pole, AK is from -25 to 15. So: is 29-15 > 29 - (-25)?
-sailor(Ocean & Mountain);
2021-2-10(#13515090@0)
Due to the pandemic, the use of vehicles decreased significantly in all major industrial countries in 2020. In the winter, the heating use in Northern China was also decreased a lot. What effect should be the result of such changes?
-sailor(Ocean & Mountain);
2021-2-10(#13515053@0)+2