Trends and Global Distributions of Halogenated Gases from ACE Satellite Measurements
Abstract
The Atmospheric Chemistry Experiment (ACE) is a small science satellite in low-earth orbit that is recording atmospheric transmission spectra in the limb geometry. The primary instrument is a high spectral resolution (0.02 cm-1) infrared Fourier transform spectrometer (ACE-FTS) operating from 2 to 13 microns (750-4400 cm-1) that measures solar occultation spectra. ACE-FTS yields a comprehensive set of simultaneous trace gas concentration profiles for more than thirty molecules as well as temperature and pressure. NASA launched ACE in August 2003 into a high inclination (74°), circular low-earth orbit (650 km) which gives ACE coverage of tropical, mid-latitude, and polar regions. ACE-FTS version 3.5/3.6 processing has 36 routine molecules of which 16 contain fluorine or chlorine (HCl, HF, ClONO2, CFC-11, CFC-12, CFC-113, COF2, COCl2, COFCl, CF4, SF6, CH3Cl, CCl4, HCFC-22, HCFC-141b, HCFC-142b) and 21 additional isotopologues (e.g., HDO, H218O, etc.). Version 4.0 processing has just started and contains 3 additional halogenated gases: HFC-134a, HFC-23 (CHF3) and ClO. Global distributions and trends for the ACE halogenated gases will be surveyed.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.V43E0154B
- Keywords:
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- 0365 Troposphere: composition and chemistry;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 1030 Geochemical cycles;
- GEOCHEMISTRYDE: 3613 Subduction zone processes;
- MINERALOGY AND PETROLOGYDE: 8430 Volcanic gases;
- VOLCANOLOGY