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Instrument: Cavity enhanced absorption spectrometers

Acronym: CEAS

External Identifier: skos:closeMatch: http://vocab.nerc.ac.uk/collection/L05/current/LAB38/

Description

Instruments that illuminate a sample inside an optical cavity, typically using laser light, and measure the concentration or amount of a species in gas phase by absorption spectroscopy. Techniques include cavity ring-down spectroscopy (CRDS) and integrated cavity output spectroscopy (ICOS).

Datasets (10)

Dataset Name	PI-Supplied Description	PI-Supplied Name
Bottle data from R/V Endeavor cruise EN665 in the Gulf of Maine, conducted April 7-12, 2021	DIC-d13C was determined using an Apollo AS-D1 DIC and d13C-DIC analyzer unit, connected to a Picarro G-2121i Cavity Ringdown Spectrometer.	Picarro G-2121i Cavity Ringdown Spectrometer
Carbonate chemistry and CTD data collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017		Picarro Cavity Ring-Down Spectroscopy (G2131-i)
Porewater dissolved organic carbon and associated geochemical data for methane seeps in the Cascadia Margin: Astoria Canyon, Barkley Canyon, Hydrate Ridge, and Bullseye Vent	CH4- Picarro G2201-i Cavity ringdown spectroscopy	Picarro G2201-i
Carbonate chemistry analyses (total alkalinity, DIC, and d13C of DIC) from discrete bottle samples and CTD data from 12 stations sampled during R/V Endeavor cruise EN669 in the Gulf of Maine during August 2021	DIC-d13C was determined using an Apollo AS-D1 DIC and d13C-DIC analyzer unit, connected to a Picarro G-2121i Cavity Ringdown Spectrometer.	Picarro G-2121i Cavity Ringdown Spectrometer
Monthly atmospheric nitrous oxide (N₂O) and carbon monoxide (CO) mixing ratio measurements from San Cristobal, Galápagos Islands collected using a cavity ring-down spectrometer from July 2023 to December 2024		Picarro Inc. G5310 Cavity Ring-down Spectrometer
Benthic chamber geochemical data obtained with an in situ benthic lander from the R/V Savannah at sampling stations across the Louisiana shelf and slope in the Northern Gulf of Mexico during four cruise between July 2021 and July 2022	DIC was measured by cavity ring-down spectrometry with a Picarro G2131-i and an Apollo SciTech AS-D1 automatic CO2 extraction system.	cavity ring-down spectrometry
Saanich Inlet field and laboratory methods related to environmental data acquired aboard the R/V John Strickland during two cruises in August, 2021 and June, 2022	Picarro Cavity Ring-Down Spectrometer: Used for measurement of nitrous oxide concentrations, both natural and in 15N-tracer experiments from 2021.	Picarro Cavity Ring-Down Spectrometer
Saanich Inlet field and laboratory methods related to experimental rate data acquired aboard the R/V John Strickland during two cruises in August, 2021 and June, 2022	Picarro Cavity Ring-Down Spectrometer: Used for measurement of nitrous oxide concentrations, both natural and in 15N-tracer experiments from 2021.	Picarro Cavity Ring-Down Spectrometer
Sinking PIC, PC in shallow sediment traps collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017	Particulate Inorganic Carbon (PIC) content was measured by acidifying a subsample of the GFF filter and measuring total CO2 released on Picarro	Picarro Cavity Ring-Down Spectroscopy Gas Analyzer (G2131-i)
Suspended PIC, PC, PN data collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017	Particulate Inorganic Carbon (PIC) content was measured by acidifying a subsample of the GFF filter and measuring total CO2 released on Picarro	Picarro Cavity Ring-Down Spectroscopy Gas Analyzer (G2131-i)