New method for estimating greenhouse gas emissions from livestock buildings using open-path FTIR spectroscopy

Susana Briz; José Barrancos; Dácil Nolasco; Gladys Melián; Eleazar Padrón; Nemesio Pérez

doi:10.1117/12.830471

24 September 2009 New method for estimating greenhouse gas emissions from livestock buildings using open-path FTIR spectroscopy

Susana Briz, José Barrancos, Dácil Nolasco, Gladys Melián, Eleazar Padrón, Nemesio Pérez

Author Affiliations +

Proceedings Volume 7475, Remote Sensing of Clouds and the Atmosphere XIV; 747510 (2009) https://doi.org/10.1117/12.830471
Event: SPIE Remote Sensing, 2009, Berlin, Germany

Abstract

It is widely known that methane, together with carbon dioxide, is one of the most effective greenhouse gases contributing to climate global change. According to EMEP/CORINAIR Emission Inventory Guidebook¹, around 25% of global CH4 emissions originate from animal husbandry, especially from enteric fermentation. However, uncertainties in the CH4 emission factors provided by EMEP/CORINAIR are around 30%. For this reason, works addressed to calculate emissions experimentally are so important to improve the estimations of emissions due to livestock and to calculate emission factors not included in this inventory. FTIR spectroscopy has been frequently used in different methodologies to measure emission rates in many environmental problems. Some of these methods are based on dispersion modelling techniques, wind data, micrometeorological measurements or the release of a tracer gas. In this work, a new method for calculating emission rates from livestock buildings applying Open-Path FTIR spectroscopy is proposed. This method is inspired by the accumulation chamber method used for CO2 flux measurements in volcanic areas or CH₄ flux in wetlands and aquatic ecosystems. The process is the following: livestock is outside the building, which is ventilated in order to reduce concentrations to ambient level. Once the livestock has been put inside, the building is completely closed and the concentrations of gases emitted by livestock begin to increase. The Open-Path system measures the concentration evolution of gases such as CO₂, CH₄, NH₃ and H₂O. The slope of the concentration evolution function, dC/dt, at initial time is directly proportional to the flux of the corresponding gas. This method has been applied in a cow shed in the surroundings of La Laguna, Tenerife Island (Spain). As expected, evolutions of gas concentrations reveal that the livestock building behaves like an accumulation chamber. Preliminary results show that the CH4 emission factor is lower than the proposed by the Emission Inventory.

Citation Download Citation

Susana Briz, José Barrancos, Dácil Nolasco, Gladys Melián, Eleazar Padrón, and Nemesio Pérez "New method for estimating greenhouse gas emissions from livestock buildings using open-path FTIR spectroscopy", Proc. SPIE 7475, Remote Sensing of Clouds and the Atmosphere XIV, 747510 (24 September 2009); https://doi.org/10.1117/12.830471

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