Air Quality Planning and Science Division
MSEI - Documentation - Port Congestion Impacts
In 2021, ports in California experienced a substantial increase in cargo imports, resulting in significant congestion at terminals and in surrounding areas. This has led to emissions increases from freight-related sources which can negatively impact air quality especially in communities near ports. The following documents detail the emission impacts from freight related sources due to this congestion.
| Freight Congestion Impacts from Containerships, Cruise, Tanker Vessels, Trucks, Locomotives, Cargo Handling Equipment - Posted February 2023 |
|
| Freight Congestion Impacts from Containerships, Trucks, Locomotives, Cargo Handling Equipment - Posted June 2022 | |
Freight Congestion Impacts from Containerships, Trucks, Locomotives, Cargo Handling Equipment - Posted January 2022 | |
Containerships Anchored at San Pedro Bay Ports - Posted November 2021 | |
Freight Congestion Impacts from Containerships, Trucks, Locomotives - Posted September 2021 | |
Containerships Anchored at San Pedro Bay Ports and Port of Oakland - Posted June 2021 |
Emission Inventory - Natural Sources
Natural Sources are non-manmade emission sources, which include biological and geological sources, wildfires, windblown dust, and biogenic emissions from plants and trees.
Areawide Source Methodologies
Find out how ARB calculates emissions from natural source categories.
- Biogenic Sources
- Wildfire Sources
- Smoke Emission Estimation
- Geogenic Sources
Biogenic Emissions Inventory
ARB estimates emissions of biogenic volatile organic compounds (BVOCs) from vegetation for natural areas, crops, and urban vegetation. BVOC emissions are functions of the species leaf mass, emission factors, temperature, and light conditions.