MID-IR CAVITY RINGDOWN SPECTROSCOPY FOR ATMOSPHERIC ETHANE ABUNDANCE MEASUREMENTS

Shen, Linhan

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https://hdl.handle.net/2142/79331 Copy

Description

Title

MID-IR CAVITY RINGDOWN SPECTROSCOPY FOR ATMOSPHERIC ETHANE ABUNDANCE MEASUREMENTS

Author(s)

Shen, Linhan

Contributor(s)

• Okumura, Mitchio
• Christensen, Lance
• Bui, Thinh Quoc

Issue Date

25-Jun-15

Keyword(s)

Instrument/Technique Demonstration

Abstract

We demonstrate a mid-IR (3.3 $mu$m) cw cavity ringdown spectrometer capable of measuring atmospheric ethane abundances. This technique can measure atmospheric ethane concentration as low as 100 ppb. The atmospheric ethane to methane ratio could also be observed by measuring methane concentration using a high precision near-IR (1.65 $mu$m) cavity ringdown spectrometer. We will also discuss the daily variation of ethane abundance and ethane to methane ratio in Pasadena observed using this tecnhique.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/79331

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