NASA Calculates a Carbon Budget for California

( -- While world organizations struggle to find a benchmark and tracking standards for greenhouse gas (GHG) emissions, NASA has been supporting California’s new carbon emissions inventory report, using its satellite imaging data and computer models of the state’s natural ecosystems.

Researchers report that in 2004, the state’s natural ecosystems absorbed as much from the atmosphere as fossil fuel carbons emitted into the atmosphere. They also discovered that during periods of above normal rainfall, ecosystems trapped significant amounts of carbon dioxide from the atmosphere in forests and soils. For these reasons, researchers suggest the ecosystems should be more extensively protected and conserved, and their emissions be monitored as closely as fossil fuel sources of GHG emissions. The results, based largely on a called the NASA-Carnegie Ames Stanford Approach (CASA), will be presented this morning at the 2009 American Geophysical Union Fall meeting in San Francisco.

"One way to facilitate emissions reductions is by using regional and national carbon budgets," explained Christopher Potter, senior research scientist at NASA Ames Research Center, Moffett Field, Calif., and author of this study. "California’s growing population and demand for all forms of energy make it essential to maintain an accurate and complete accounting of the state’s inventory," Potter added.

California’s population is more than 10 percent of the total population in the United States, and produces 13 percent of the U.S. gross domestic product, according to 2000 U.S. Census Bureau data. Because of its large population, the state also contributes significantly to global GHG emissions. If California was a country, it would rank among the top 20 national GHG emitters worldwide.

The carbon budget of a region is determined by the amounts of carbon dioxide and methane gases absorbed or released by “green” vegetative ground cover, as observed by NASA satellites. These fluctuations are important to quantify, because they originate from both natural and anthropogenic processes.

In California, the main sources of carbon dioxide emissions are energy consumption in commercial, residential, industrial, and transportation sectors, production of cement and lime, and waste treatment. The main sources of emission are derived from landfills and agricultural (principally livestock-based) systems.

Scientists believe that California’s carbon budget is of special interest because the state may represent a U.S. national carbon budget; both have diversified lands, similar consumption of natural resources, and urban lifestyles. Other similarities include a mix of fossil fuel emissions, alternative energy sources, and ecosystem sinks.

Each year, California is required by law to compile a new carbon emission inventory, which is conducted by the California Energy Commission and California’s Air Resources Board. To refine the state’s emission inventory, NASA was asked to provide NASA data and carbon models. To locate the largest ecosystem sources and carbon sinks in California, scientists used the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the NASA Terra satellite. The vegetation “greenness” data from the MODIS sensor was directly downloaded into the CASA ecosystem simulation model. Scientists used the data to estimate monthly variations in the accumulated biomass of wood and other plant materials, such as the accumulated dead leaf biomass transferred into soil carbon pools. Inventory data from the California Energy Commission also was used to model the carbon dioxide emissions from fossil fuel combustion and emissions from agricultural lands throughout the state.

This project was funded by NASA as part of a long-term research program dedicated to understanding how human-induced and natural changes affect our global environment.

Explore further

U.S. greenhouse emissions up 1.7 percent

Provided by JPL/NASA
Citation: NASA Calculates a Carbon Budget for California (2009, December 16) retrieved 23 October 2019 from
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Feedback to editors

User comments

Dec 16, 2009
So what!

NASA is, and has been for yrs, sitting on FOI requests for release of their public, but kept secret, emails, data, and methods on the relationship between CO2 and global warming. Until there is transparency in NASA's involvement in what appears to be a major hoax on the public, why should we believe any NASA releases?

Dec 17, 2009
California is going broke yet they waste money figuring out how much CO2 a gas created by breathing is being released. Please people research Climategate.... AGW proponenents will bankrupt the US and not solve a single real problem

Dec 17, 2009
It's like watching leeches devour the once fertile crops of the Golden State. The priesthood demanding sacrifices of the people to appease the Angry Carbon God.

Dec 17, 2009
Its no good just balancing current CO2 emissions with CO2 captured. We have 150 years of burning large amounts of fossil carbon behind us. A budget target need to be negative. More carbon needs to go into sinks than is being produced from all sources.

Dec 20, 2009
If they want a proper carbon credit program, why don't they use NASA satellites to categorize each tree, photogenic life, and/or "carbon sink" and make a general proportion to the "carbon fountains" or highways, power plants, etc. such that the credits will be more expensive to purchase if there aren't enough sinks per unit district. This would inflate tree growth around companies that wish to produce carbon rich emissions by planting less costly "sinks" around their leased property. Maybe?

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more