Tie et al. (2006) 采用USGS中的1 km×1 km

. Tie et al (2006) using the USGS of 1 km × 1 km land cover data 20 to determine the type of vegetation, each imparting a vegetation average emission factor; less data sources, certain portions of articles from the emission factor value. The study of isoprene emission factors Broadleaf half this study, this difference results in the difference section 9 Tg C yr-1 ~ Isoprene emissions; certain types of vegetation, such as shrubs and grass, isoprene emission factor 0, resulting in differences ~ 5 Tg C yr-1 emissions.

Tie et al. (2006) identified 20 vegetation types in the 1 km x 1 km land cover data in USGS, each given an average emission factor; In this study, the broad-leaved tree isoprene emission factor was half of the study, and this part of the difference led to a difference in isoprene emissions of 9 Tg C yr-1, and a 0 isoprene emission factor of 9 Tg C yr-1, and a 0 isoprene emission factor for certain vegetation types, resulting in a difference of 5 Tg C yr-1 emissions.

Tie et al. (2006) used 1 km × 1 km land cover data in USGS to determine 20 vegetation types, and each vegetation type was given an average emission factor; the data source was small, and some emission factors were taken from a literature value. In this study, the isoprene emission factor of broad-leaved trees is half of that of this study, which leads to the difference of ~ 9 TG Cyr − 1 isoprene emission; for some vegetation types, such as shrubs and grasslands, the isoprene emission factor is 0, which leads to the difference of ~ 5 TG Cyr − 1 emission.