| Day 1 | Time hours | 0 | 12 | 24 |
| Energy balance | 0 | A + a − B − b = B + b | A + a − 2B − 2b = 0 | |
| Temperature | T0 | T1 + Δt | T0 | |
| Day 2 | Time hours | 0 | 12 | 24 |
| Energy balance | 0 | A + a − B − b = B + b | A + a − 2B − 2b = 0 | |
| Temperature | T0 | T1 + Δt | T0 |