Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Brian R Washburn"'
Autor:
Griffin J. Mead, Daniel I. Herman, Fabrizio R. Giorgetta, Nathan A. Malarich, Esther Baumann, Brian R. Washburn, Nathan R. Newbury, Ian Coddington, Kevin C. Cossel
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 2, Pp n/a-n/a (2024)
Abstract Quantifying sector‐resolved methane fluxes in complex emissions environments is challenging yet necessary to improve emissions inventories and guide policy. Here, we separate energy and agriculture sector emissions using a dynamic linear m
Externí odkaz:
https://doaj.org/article/f1fc61fe866d4865835b69636ed836e4
Autor:
Griffin J Mead, Daniel I Herman, Fabrizio R Giorgetta, Nathan A Malarich, Esther Baumann, Brian R Washburn, Nathan R Newbury, Ian Coddington, Kevin C Cossel
Quantifying sector-resolved methane fluxes in complex emissions environments is challenging yet necessary for inventory validations. We separate energy and agriculture sector methane using a dynamic linear model of methane, ethane, and ammonia mixing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::adc644a659fb828f9b351e8832bb65ec
https://doi.org/10.22541/essoar.168554944.49905260/v1
https://doi.org/10.22541/essoar.168554944.49905260/v1
Autor:
Daniel I. Herman, Griffin Mead, Fabrizio R. Giorgetta, Esther Baumann, Nathan Malarich, Brian R. Washburn, Nathan R. Newbury, Ian Coddington, Kevin C. Cossel
Publikováno v:
eISSN
We present an open-path mid-infrared dual-comb spectrometer (DCS) capable of precise measurement of the stable water isotopologues H216O and HD16O. This system ran in a remote configuration at a rural test site for 3.75 months with 60 % uptime and ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::406c737a98e8dc0256ff52da03492490
https://doi.org/10.5194/egusphere-2022-1263
https://doi.org/10.5194/egusphere-2022-1263
Autor:
Daniel I. Herman, Griffin J. Mead, Nathan A. Malarich, Fabrizio R. Giorgetta, Esther Baumann, Brian R. Washburn, Nathan R. Newbury, Ian Coddington, Kevin C. Cossel
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
Using an open-path mid-infrared dual-comb spectrometer, we measure the δD of atmospheric water vapor at a remote site with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4de79262c032ccd0805676912fb5a910
https://doi.org/10.1364/es.2022.em2d.4
https://doi.org/10.1364/es.2022.em2d.4
Autor:
Griffin J. Mead, Daniel I. Herman, Nathan A. Malarich, Fabrizio R. Giorgetta, Esther Baumann, Brian R. Washburn, Nathan R. Newbury, Ian Coddington, Kevin C. Cossel
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
Multi-month methane and ethane measurements in the Northern Colorado Front Range using open-path dual-comb spectroscopy are reported. Conditional probability densities of measurements stratified by composition ratio distinguishes between wellhead and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d581902fa52275477a5985cc081316b2
https://doi.org/10.1364/es.2022.em2d.6
https://doi.org/10.1364/es.2022.em2d.6
Publikováno v:
Frontiers in Optics + Laser Science 2022 (FIO, LS).
A frequency comb based electro-optic sampling system with constant bandwidth was developed to characterize the response of an ultrafast photodiode. The system measured comparable photodiode bandwidth with reduced acquisition time but with poorer sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e030575ad66c94a75e6aae89dfdbce8f
https://doi.org/10.1364/fio.2022.ftu1b.4
https://doi.org/10.1364/fio.2022.ftu1b.4
Autor:
Daniel I. Herman, Griffin Mead, Nathan Malarich, Fabrizio Giorgetta, Esther Baumann, Brian R. Washburn, Nathan Newbury, Ian Coddington, Kevin Cossel
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate high-uptime field operation of a broadband open-path mid-infrared dual comb spectrometer. The system detects diurnal variations of all primary greenhouse gases, hydrocarbon emissions from gas production and ambient fluctuations of form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3919c336179d26fd962c604099c193e
https://doi.org/10.1364/cleo_at.2022.am4m.3
https://doi.org/10.1364/cleo_at.2022.am4m.3
Autor:
Nathan Malarich, Brian R. Washburn, Kevin Cossel, Fabrizio Giorgetta, Brett D. DePaola, Steven M. Welch, Eduardo A. Santos, Nathan Newbury, Ian Coddington
Publikováno v:
Conference on Lasers and Electro-Optics.
We configure a fiber-laser based dual-comb spectrometer to measure the O2 delta band (1260 nm) in addition to CO2 and CH4 absorption features (1600 nm).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35626da15753dfdc8bb653aac06a71a2
https://doi.org/10.1364/cleo_at.2022.am4m.6
https://doi.org/10.1364/cleo_at.2022.am4m.6
Autor:
Nathan A. Malarich, Kevin Cossel, Fabrizio Giorgetta, Esther Baumann, Griffin Mead, Daniel I. Herman, Brian R. Washburn, Nathan Newbury, Ian Coddington
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
In order to measure gas concentrations with sub-percent accuracy, we measure, simulate and propose solutions for removing analog to digital converter (ADC) imposed bias on the recorded interferograms in dual comb spectroscopy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::745998a4d8534060c1cbf15619a28f2b
https://doi.org/10.1364/es.2022.em3d.2
https://doi.org/10.1364/es.2022.em3d.2
Autor:
Nathan A. Malarich, Brian R. Washburn, Kevin C. Cossel, Griffin J. Mead, Fabrizio R. Giorgetta, Daniel I. Herman, Nathan R. Newbury, Ian Coddington
Publikováno v:
Optics Express. 31:5042
Dual-comb spectroscopy measures greenhouse gas concentrations over kilometers of open air with high precision. However, the accuracy of these outdoor spectra is challenging to disentangle from the absorption model and the fluctuating, heterogenous co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e963b054312ed41bc0681ffc418a1b57
https://doi.org/10.1364/oe.480301
https://doi.org/10.1364/oe.480301