Global warming. Rain might be leading carbon sink factor.
Lovett
Richard A
RA
D001272:Atmosphere; D002245:Carbon Dioxide / Q000378:metabolism; D003198:Computer Simulation; D017752:Greenhouse Effect; D010788:Photosynthesis; D063245:Plant Development; D010944:Plants / Q000378:metabolism; D011891:Rain; D013696:Temperature; D014197:Trees / Q000254:growth & development / Q000378:metabolism; D014481:United States
D002245:Carbon Dioxide