Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Integrated radiative forcing of current emissions, by substance and transport subsector, over different time horizons. (A) Integrated global mean RF (mW/m2 yr) due to 2000 transport emissions, time horizon H = 100 years. (B) Integrated global mean net RF per sector due to 2000 transport emissions, normalized to the values for road transport for various time horizons (20, 100, and 500 years). Uncertainty ranges are given as 1 SD.
