Season definitions for the animation
Season definitions for the animation (the three months are averaged
together to reduce noise):
Fall
- OND - October/November/December
- NDJ - November/December/January
Winter
- DJF - December/January/February
- JFM - January/February/March
- FMA - February/March/April
Spring
- MAM - March/April/May
- AMJ - April/May/June
- MJJ - May/June/July
Summer
- JJA - June/July/August
- JAS - July/August/September