Validating passive acoustic methods for gas flux quantification, offshore Panarea, Mediterreanean Sea

2019 ◽  
Vol 146 (4) ◽  
pp. 2965-2965
Author(s):  
Ben Roche ◽  
Jianghui Li ◽  
Paul White ◽  
Jonathan M. Bull ◽  
John W. Davis ◽  
...  
Keyword(s):  
Gas Flux ◽  
Acoustic Methods ◽  
Flux Quantification ◽  
Passive Acoustic

scholarly journals Precise multispecies agricultural gas flux determined using broadband open-path dual-comb spectroscopy

2021 ◽  
Vol 7 (14) ◽  
pp. eabe9765
Author(s):  
Daniel I. Herman ◽  
Chinthaka Weerasekara ◽  
Lindsay C. Hutcherson ◽  
Fabrizio R. Giorgetta ◽  
Kevin C. Cossel ◽  
...  
Keyword(s):  
Ecological Monitoring ◽  
Trace Gas ◽  
Gas Analyzer ◽  
Gas Flux ◽  
Time Resolved ◽  
Trace Gas Emissions ◽  
Open Path ◽  
Statistical Precision ◽  
Methane Fluxes ◽  
Flux Quantification

Advances in spectroscopy have the potential to improve our understanding of agricultural processes and associated trace gas emissions. We implement field-deployed, open-path dual-comb spectroscopy (DCS) for precise multispecies emissions estimation from livestock. With broad atmospheric dual-comb spectra, we interrogate upwind and downwind paths from pens containing approximately 300 head of cattle, providing time-resolved concentration enhancements and fluxes of CH4, NH3, CO2, and H2O. The methane fluxes determined from DCS data and fluxes obtained with a colocated closed-path cavity ring-down spectroscopy gas analyzer agree to within 6%. The NH3 concentration retrievals have sensitivity of 10 parts per billion and yield corresponding NH3 fluxes with a statistical precision of 8% and low systematic uncertainty. Open-path DCS offers accurate multispecies agricultural gas flux quantification without external calibration and is easily extended to larger agricultural systems where point-sampling-based approaches are insufficient, presenting opportunities for field-scale biogeochemical studies and ecological monitoring.

scholarly journals Passive acoustic methods for tracking the 3D movements of small cetaceans around marine structures

PLoS ONE ◽  
2020 ◽  
Vol 15 (5) ◽  
pp. e0229058 ◽  
Author(s):  
Douglas Gillespie ◽  
Laura Palmer ◽  
Jamie Macaulay ◽  
Carol Sparling ◽  
Gordon Hastie
Keyword(s):  
Marine Structures ◽  
Acoustic Methods ◽  
Passive Acoustic

Local habitat use by botos (Amazon river dolphins,Inia geoffrensis) using passive acoustic methods

2015 ◽  
Vol 32 (1) ◽  
pp. 220-240 ◽  
Author(s):  
Yukiko Yamamoto ◽  
Tomonari Akamatsu ◽  
Vera M. F. da Silva ◽  
Shiro Kohshima
Keyword(s):  
Habitat Use ◽  
Amazon River ◽  
Acoustic Methods ◽  
Inia Geoffrensis ◽  
Passive Acoustic ◽  
Local Habitat

scholarly journals Broadband Acoustic Inversion for Gas Flux Quantification—Application to a Methane Plume at Scanner Pockmark, Central North Sea

2020 ◽  
Vol 125 (9) ◽  
Author(s):  
Jianghui Li ◽  
Ben Roche ◽  
Jonathan M. Bull ◽  
Paul R. White ◽  
Timothy G. Leighton ◽  
...  
Keyword(s):  
North Sea ◽  
Gas Flux ◽  
Flux Quantification ◽  
Acoustic Inversion ◽  
Central North Sea
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