Can I read Ammonia and methane emissions from dairy concentrated animal feeding operations in California, using mobile optical remote sensing on EtoBox?

Ammonia and methane emissions from dairy concentrated animal feeding operations in California, using mobile optical remote sensing by N.T. Vechi; J. Mellqvist; J. Samuelsson; B. Offerle; C. Scheutz is a Environmental Science article available to read on EtoBox.

What is Ammonia and methane emissions from dairy concentrated animal feeding operations in California, using mobile optical remote sensing about?

Dairy concentrated animal feeding operations (CAFOs) are significant sources of methane (CH4) and ammonia (NH3) emissions in the San Joaquin Valley, California. Optical techniques, namely, remote sensing by Solar Occultation Flux (SOF) and Mobile extractive FTIR (MeFTIR), were used to measure NH3 air column and ground air concentrations of NH3 and CH4, respectively. Campaigns were performed in May and October 2019 and covered 14 dairies located near Bakersfield and Tulare, California. NH3 and CH4 emission rates from single CAFOs averaged 101.9 ± 40.6 kgNH3/h and 437.7 ± 202.0 kgCH4/h, respectively, corresponding to emission factors (EFs) per livestock unit of 9.1 ± 2.7 gNH3/LU/h and 40.1 ± 17.8 gCH4/LU/h. The NH3 emissions had a median standard uncertainty of 17% and an expanded uncertainty (95% Confidence Interval (CI)) of 37%; meanwhile, CH4 emissions estimates had greater uncertainty, median of 25% and 53% (in the 95% CI). Decreasing NH3 to CH4 ratios and NH3 EFs from early afternoon (13:00) to early night (19:00) indicated a diurnal emission pattern with lower ammonia emissions during the night. On average, measured NH3 emissions were 28% higher when compared to daytime emissio

Who reads Ammonia and methane emissions from dairy concentrated animal feeding operations in California, using mobile optical remote sensing?

Author

N.T. Vechi; J. Mellqvist; J. Samuelsson; B. Offerle; C. Scheutz

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)