# Code table 4.238 - Source or sink
0 0 Reserved
1 1 Aviation
2 2 Lightning
3 3 Biogenic sources
4 4 Anthropogenic sources
5 5 Wild fires
6 6 Natural sources
7 7 Volcanoes
8 8 Bio-fuel
9 9 Fossil-fuel
10 10 Wetlands
11 11 Oceans
255 255 Missing