Zobrazeno 1 - 10
of 957
pro vyhledávání: '"R Newbury"'
Autor:
C. Weerasekara, L. C. Morris, N. A. Malarich, F. R. Giorgetta, D. I. Herman, K. C. Cossel, N. R. Newbury, C. E. Owensby, S. M. Welch, C. Blaga, B. D. DePaola, I. Coddington, B. R. Washburn, E. A. Santos
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 6107-6117 (2024)
Accurate whole-farm or herd-level measurements of livestock methane emissions are necessary for anthropogenic greenhouse gas inventories and to evaluate mitigation strategies. A controlled methane (CH4) release experiment was performed to determine i
Externí odkaz:
https://doaj.org/article/2b418c8290724df2a7b6ddb4cfb623ab
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 5697-5707 (2023)
Determination of trace gas emissions from sources is critical for understanding and regulating air quality and climate change. Here, we demonstrate a method for rapid quantification of the emission rate of multiple gases from simple and complex sourc
Externí odkaz:
https://doaj.org/article/63ae70467bc543f0a65fcf845eb29fca
Autor:
D. I. Herman, G. Mead, F. R. Giorgetta, E. Baumann, N. A. Malarich, B. R. Washburn, N. R. Newbury, I. Coddington, K. C. Cossel
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 4053-4066 (2023)
We present an open-path mid-infrared dual-comb spectroscopy (DCS) system 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
Externí odkaz:
https://doaj.org/article/855974fb5d8348208f32b439a2c514aa
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:
Emily D. Caldwell, Laura C. Sinclair, Jean-Daniel Deschenes, Fabrizio Giorgetta, Nathan R. Newbury
Publikováno v:
APL Photonics, Vol 9, Iss 1, Pp 016112-016112-19 (2024)
With the demonstration of quantum-limited optical time transfer capable of tolerating the losses associated with long ground-to-space links, two future applications of free-space time transfer have emerged: intercontinental clock comparisons for time
Externí odkaz:
https://doaj.org/article/00ab62d3114d472da4fcd17dccfae1e2
Autor:
Fabrizio R. Giorgetta, Jean-Daniel Deschênes, Richard L. Lieber, Ian Coddington, Nathan R. Newbury, Esther Baumann
Publikováno v:
APL Photonics, Vol 9, Iss 1, Pp 010805-010805-11 (2024)
We explore the advantages of a free-form dual-comb spectroscopy (DCS) platform based on time-programmable frequency combs for real-time, penalty-free apodized scanning. In traditional DCS, the fundamental spectral point spacing, which equals the comb
Externí odkaz:
https://doaj.org/article/2e015c5a5ff44639b3f99342094df856
Autor:
Griffin J. Mead, Eleanor M. Waxman, Daniel Bon, Daniel I. Herman, Esther Baumann, Fabrizio R. Giorgetta, Jacob T. Friedlein, Gabriel Ycas, Nathan R. Newbury, Ian Coddington, Kevin C. Cossel
Publikováno v:
Frontiers in Chemistry, Vol 11 (2023)
We present results from a field study monitoring methane and volatile organic compound emissions near an unconventional oil well development in Northern Colorado from September 2019 to May 2020 using a mid-infrared dual-comb spectrometer. This instru
Externí odkaz:
https://doaj.org/article/01c236532203491abed50746b76e50da
Autor:
Jacob T. Friedlein, Esther Baumann, Kimberly A. Briggman, Gabriel M. Colacion, Fabrizio R. Giorgetta, Aaron M. Goldfain, Daniel I. Herman, Eli V. Hoenig, Jeeseong Hwang, Nathan R. Newbury, Edgar F. Perez, Christopher S. Yung, Ian Coddington, Kevin C. Cossel
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-10 (2020)
Spectrally resolved photoacoustic images often require the acquisition of data for each wavelength separately. Here, the authors use dual frequency-comb spectroscopy for photoacoustic measurements, enabling spectrally resolved measurements without th
Externí odkaz:
https://doaj.org/article/fed50640169f401cbae11d8841e51dc8
Autor:
Hugo Bergeron, Laura C. Sinclair, William C. Swann, Isaac Khader, Kevin C. Cossel, Michael Cermak, Jean-Daniel Deschênes, Nathan R. Newbury
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019)
Optical clock networks have many applications from precision time keeping, sensing to fundamental physics. Here the authors demonstrate robust and free-space femtosecond time synchronization of optical clocks via a moving quadcopter.
Externí odkaz:
https://doaj.org/article/1560e220fce443d39a38bbef6c982741
Autor:
E. M. Waxman, K. C. Cossel, F. Giorgetta, G.-W. Truong, W. C. Swann, I. Coddington, N. R. Newbury
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 4177-4192 (2019)
We performed 7.5 weeks of path-integrated concentration measurements of CO2, CH4, H2O, and HDO over the city of Boulder, Colorado. An open-path dual-comb spectrometer simultaneously measured time-resolved data across a reference path, located near
Externí odkaz:
https://doaj.org/article/7cacf3ca837242a78d86dce73fe9e188