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United States Department of Agriculture

Agricultural Research Service

Research Project: MANAGEMENT OF AGRICULTURAL AND NATURAL RESOURCE SYSTEMS TO REDUCE ATMOSPHERIC EMISSIONS AND INCREASE RESILIENCE TO CLIMATE CHANGE Title: Volatile organic compound emissions from dairy facilities in central California

Authors
item Hasson, Alam -
item Ogunjemiyo, Segun -
item Trabue, Steven
item Niddala, Srikar -
item Ashkan, Shawn -
item Vu, Kennedy -
item Addala, Laxmi -
item Olea, Catalinia -
item Nana, Lucien -
item Scruggs, Austen -
item Steele, Julie -
item Shelton, Thomas -
item Osborne, Brenda -
item Mc Henry, James -

Submitted to: American Geophysical Union
Publication Type: Abstract Only
Publication Acceptance Date: September 1, 2011
Publication Date: N/A

Technical Abstract: Emissions of volatile organic compounds (VOCs) from dairy facilities are thought to be an important contributor to high ozone levels in central California, but emissions inventories from these sources contain significant uncertainties. In this work, VOC emissions were measured at two central California dairies during 2010 and 2011. Isolation flux chambers were used to measure direct emissions from specific dairy sources, and upwind/downwind ambient profiles were measured from ground level up to heights of 60 m. Samples were collected using a combination of canisters and sorbent tubes, and were analyzed by GC-MS. Additional in-situ measurements were made using infra-red photoaccoustic detectors and Diode Laser Absorption Spectroscopy. Temperature and ozone profiles up to 250 m above ground level were also measured using a tethersonde. Substantial, fluxes of a number of VOCs including alcohols, volatile fatty acids and esters were observed at both sites. Implications of these measurements for regional air quality will be discussed.

Last Modified: 10/25/2014
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