Photo: Derek Coffman/NOAA Researchers deploy SeaSweep, used to sample aerosols from bursting bubbles in seawater, from R/V Atlantis during CalNex. Photo: Derek Coffman/NOAA Scripps Institution of Oceanography at UC San Diego researchers joined colleagues from more than 15 other research centers on a NOAA-led project to collect aircraft and ship-based measurements throughout California and Tijuana, Mexico. The study provides a comprehensive survey of pollution across the state. UCSD atmospheric chemistry professor Kim Prather will discuss aircraft and shipboard measurements of aerosol chemistry and sources in southern and northern California. NOAA's Twin Otter aircraft and Woods Hole Oceanographic Institution's research vessel Atlantis collected the data. Prather's is one of several presentations on the CalNex 2010 field campaign being discussed at the 2010 American Geophysical Union (AGU) Fall Meeting in San Francisco. (A12A-07 Â· Monday, Dec. 13, 12:00 p.m. Â· 3002 Moscone West) "Understanding the sources of human-made aerosols in air pollution and how they mix with natural aerosols such as those generated from the ocean is critical to understand their overall impact on regional climate and air pollution in California," said Prather, a 2010 AGU fellow. Lynn Russell, an atmospheric chemistry professor at Scripps Oceanography and a CalNex principal investigator, said the project could be the most comprehensive study to date of aerosols and pollution in a region as diverse as California completed. "It should provide a great guideline for us about sources of particles as well as their impact," said Russell. "It'll give us an idea of the variety of the aerosols in California." The measurements from Russell's research group have contributed to multiple collaborative studies being discussed during several AGU presentations, including one by Scripps scientist Satoshi Takahama. Takahama will present air samples collected at the Tijuana station in an associated project called CalMex, which revealed the signatures of trash burning and the still-frequent use of older cars and trucks in the Mexican border city. (A33D-0182 Â· Wednesday, Dec. 15, 1:40 - 6:00 p.m. Â· Poster Hall, Moscone South) Surfers look on as R/V Atlantis approaches the Scripps Pier during CalNex in May 2010. Surfers look on as R/V Atlantis approaches the Scripps Pier during CalNex in May 2010. Scripps graduate student Cassandra Gaston will present an analysis of the chemical composition of individual aerosol particles to determine which natural and human sources were impacting the marine boundary layer and the kinds of chemical reactions that took place in the atmosphere. (A14A-02 Â· Monday, Dec. 13, 4:15 p.m. Â· 3002 Moscone West) R/V Atlantis sampled air up the coast from San Diego to the Sacramento River delta to gather a cross section of California's coastal air from the congestion of America's busiest commercial port in Long Beach to the open ocean and to the plumes of exhaust given off by cargo ships at sea. Scripps graduate student Shang Liu will discuss research on the source signatures of particles contained in ambient air samples from ground stations in Bakersfield, which often contain high concentrations of filter-darkening agriculturally based particles, such as those caused by burning crop waste. (A11F-0136 Â· Monday, Dec. 13, 8 a.m. - 12:20 p.m. Â· Poster Hall, Moscone South) Researchers expect that analysis could start yielding conclusions by early 2011. A report to the California Air Resources Board, which funded a portion of the CalNex study that took place in Bakersfield, could help to shape air quality regulations in the future. # # # RELATED PRESENTATIONS: A11F-0136 Â· Monday, Dec. 13, 8 a.m. - 12:20 p.m. Â· Poster Hall, Moscone South "SOURCE SIGNATURES OF ORGANIC COMPOUNDS IN THE PARTICLE PHASE IN BAKERSFIELD, CA" A12A-07 Â· Monday, Dec. 13, 12:00 p.m. Â· 3002 Moscone West "AIRCRAFT AND SHIPBOARD MEASUREMENTS OF AEROSOL MIXING STATE IN SOUTHERN AND NORTHERN CALIFORNIA DURING THE CALNEX 2010 AND CARES FIELD CAMPAIGNS" (INVITED) A14A-02 Â· Monday, Dec. 13, 4:15 p.m. Â· 3002 Moscone West "THE IMPACT OF PORT EMISSIONS AND MARINE BIOGENICS ON THE SINGLE-PARTICLE CHEMISTRY OF MARINE AEROSOL MEASURED ON BOARD THE R/V ATLANTIS DURING THE CALNEX 2010 FIELD CAMPAIGN" A33D-0182 Â· Wednesday, Dec. 15, 1:40 - 6:00 p.m. Â· Poster Hall, Moscone South "COATINGS OF BLACK CARBON IN TIJUANA, MEXICO, DURING THE CALMEX CAMPAIGN"
Related Video: American Geophysical Union
Scripps contact: Annie Reisewitz (858-228-0526) or AGU Press Room