Table 1 Ambient illuminance values with and without snow at the same range of solar altitude angles range.
From: Effects of snow cover on urban light climate environment in the high latitudes of northeast China
Range of solar altitude angle | Without snow | With snow | Difference |
|---|---|---|---|
− 5°–0° | 14.070 | 113.173 | 99.103 |
0°–5° | 698.511 | 3158.969 | 2460.458 |
5°–10° | 2118.444 | 11,017.842 | 8899.398 |
10°–15° | 3661.111 | 19,548.568 | 15,887.457 |
15°–20° | 4616.666 | 25,639.474 | 21,022.807 |
20°–25° | 4817.333 | 26,880.877 | 22,063.544 |
25°–30° | 5803.889 | 27,668.246 | 21,864.357 |
20°–25° | 5303.556 | 26,039.649 | 20,736.093 |
15°–20° | 3372.444 | 23,008.947 | 19,636.503 |
10°–15° | 1822.767 | 15,734.579 | 13,911.812 |
5°–10° | 334.903 | 6149.930 | 5815.026 |
0°–5° | 0.169 | 136.313 | 136.144 |
Average value | 2713.655 | 15,424.714 | 12,711.059 |
