Global distribution of upper tropospheric formic acid from the ACE-FTS

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Abstract

We present the first near global upper tropospheric distribution of formic acid (HCOOH) observed from space using solar occultation measurements from the Fourier transform spectrometer (FTS) on board the Atmospheric Chemistry Experiment (ACE) satellite. Using a new set of spectroscopic line parameters recently published for formic acid by Vander Auwera et al. (2007) and Perrin and Vander Auwera (2007), we have retrieved the concentrations of HCOOH between 5 km and the tropopause for ACE-FTS observations from February 2004 to September 2007. We observe a significant seasonal dependence for the HCOOH concentrations related to vegetation growth and biomass burning. We estimate an emission ratio of 0.0051±0.0015 for HCOOH relative to CO for tropical South American fires using a selected set of data for September 2004. Results from the balloon-borne MkIV Fourier transform spectrometer are also presented and compared with the ACE measurements.

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APA

Abad, G. G., Bernath, P. F., Boone, C. D., McLeod, S. D., Manney, G. L., & Toon, G. C. (2009). Global distribution of upper tropospheric formic acid from the ACE-FTS. Atmospheric Chemistry and Physics, 9(20), 8039–8047. https://doi.org/10.5194/acp-9-8039-2009

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