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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

Location: Soil, Water & Air Resources Research

Title: Volatile organic compound emissions from dairy facilities in central California)

Author
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: 9/1/2011
Publication Date: N/A
Citation: N/A

Interpretive Summary:

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: 04/22/2017
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