Field measurement evidence for an atmospheric chemical source of formic and acetic acids in the tropic

Sanhueza, Eugenio; Santana, Magaly; Trapp, D.; Serves, Claes de; Figueroa, L. C. Mantilla; Romero, Rodrigo; Rondôn, Alberto; Donoso, Loreto

doi:10.1029/96gl01038

Cited by 21 publications

(18 citation statements)

References 23 publications

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“…[25] It can be assumed that the in situ formation through mechanisms such as those suggested from olefin ozonolysis, isoprene oxidation, and gas phase reaction of HCHO with HO 2 [Jacob and Wofsy, 1988;Talbot et al, 1990;Madronich et al, 1990;Sanhueza et al, 1996] can take place and could be contributing under very specific conditions to the upper tropospheric levels of HCOOH. The savannah region of southern Africa undergoes a flaming-type of combustion, which is characterized to favor the emission of simple compounds during the pyrolisis process.…”

Section: Day-night Differencesmentioning

confidence: 99%

Global distribution and variability of formic acid as observed by MIPAS‐ENVISAT

Grutter¹,

Glatthor²,

Stiller³

et al. 2010

J. Geophys. Res.

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Formic acid (HCOOH) vertical profiles have been retrieved from MIPAS‐ENVISAT satellite data in the upper troposphere for the first time. Based on new spectroscopic line‐strength measurements by Vander Auwera et al. (2007) of HCOOH, a retrieval setup was developed and optimized to study its global distribution between 2002 and 2008. A strong seasonality, directly associated to plant growth and corresponding biogenic emissions, is observed and dominates in the middle latitudes of the Northern Hemisphere. Here, the mean monthly volume mixing ratios (VMR) at 8 km altitude typically reach 100–110 parts per trillion in volume (pptv) during the summer and decrease to about 45 pptv in the early winter. At 16 km and higher altitudes, the VMRs remain under the 20 pptv level and have a much smaller amplitude (<10 pptv). In the Southern Hemisphere, strong signals (up to 1 ppbv at 10 km in a single measurement) are detected from biomass burning during the August–October time period and can enhance the monthly mean background levels above specific tropical and midlatitudinal regions by a factor of 2 or more. In‐plume production of HCOOH through photochemical processes has been identified during an extreme event in September 2006, although it is not likely to contribute significantly to the overall upper tropospheric abundances of formic acid.

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Section: Day-night Differencesmentioning

confidence: 99%

Global distribution and variability of formic acid as observed by MIPAS‐ENVISAT

Grutter¹,

Glatthor²,

Stiller³

et al. 2010

J. Geophys. Res.

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“…They indicate that HCOOH is, after acetic acid (CH 3 COOH), the most abundant global organic carboxylic acid present in the Earth's atmosphere, in both gaseous and liquid phases (e.g., Talbot et al, 1988Talbot et al, , 1990Puxbaum et al, 1988;Andreae et al, 1988;Arlander et al, 1990;Klemm et al, 1994;Sanhueza et al, 1996;Kesselmeier and Staudt, 1999;Khare et al, 1999;Poisson et al, 2000;Legrand et al, 2003Legrand et al, , 2004. These studies further suggest that the main HCOOH sources are of biogenic origin (e.g., direct emissions and indirect production via oxidation and ozonolysis of reactive hydrocarbons released by soils, vegetation, forests, seas, biomass burning, ants) and anthropogenic releases (via wild bush and waste fires, domestic heating, road traffic, .…”

Section: Introductionmentioning

confidence: 99%

Formic acid above the Jungfraujoch during 1985–2007: observed variability, seasonality, but no long-term background evolution

Zander¹,

Duchatelet²,

Mahieu³

et al. 2010

Atmos. Chem. Phys.

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Abstract. This paper reports on daytime total vertical column abundances of formic acid (HCOOH) above the Northern mid-latitude, high altitude Jungfraujoch station (Switzerland; 46.5 • N, 8.0 • E, 3580 m alt.). The columns were derived from the analysis of infrared solar observations regularly performed with high spectral resolution Fourier transform spectrometers during over 1500 days between September 1985 and September 2007. The investigation was based on the spectrometric fitting of five spectral intervals, one encompassing the HCOOH ν 6 band Q branch at 1105 cm −1 , and four additional ones allowing to optimally account for critical temperature-sensitive or time-evolving interferences by other atmospheric gases, in particular HDO, CCl 2 F 2 and CHClF 2 . The main results derived from the 22 years long database indicate that the free tropospheric burden of HCOOH above the Jungfraujoch undergoes important shortterm daytime variability, diurnal and seasonal modulations, inter-annual anomalies, but no significant long-term background change.A major progress in the remote determination of the atmospheric HCOOH columns reported here has resulted from the adoption of new, improved absolute spectral line intensities for the infrared ν 6 band of trans-formic acid, resulting in retrieved free tropospheric loadings being about a factor two smaller than if derived with previous spectroscopic parameters. Implications of this significant change with regard to earlier remote measurements of atmospheric formic acid Correspondence to: P. Duchatelet (p.duchatelet@ulg.ac.be) and comparison with relevant Northern mid-latitude findings, both in situ and remote, will be assessed critically. Sparse HCOOH model predictions will also be evoked and assessed with respect to findings reported here.

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“…Despite its enormous dimensions, little is known about the release of VOC species from the Amazonian rainforest, or any tropical rainforest. There have been a few studies of oxygenated VOC species (Andreae et al, 1988;Khare et al, 1999;Sanhueza and Andreae, 1991;Sanhueza et al, 1996;Trapp and Deserves, 1995) as well as a small number of publications dealing with isoprenoids (Rasmussen and Khalil, 1988;Zimmerman et al, 1988;Helmig et al, 1998. ) Isoprenoid emissions have been studied in a few other tropical forest regions including central Africa and central America (Lerdau and Keller, 1997;Klinger et al, 1998;Keller and Lerdau, 1999;Guenther et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric volatile organic compounds (VOC) at a remote tropical forest site in central Amazonia

Kesselmeier

Kühn

Wolf

et al. 2000

Atmospheric Environment

167

104

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According to recent assessments, tropical woodlands contribute about half of all global natural non-methane volatile organic compound (VOC) emissions. Large uncertainties exist especially about #uxes of compounds other than isoprene and monoterpenes. During the Large-Scale Biosphere/Atmosphere Experiment in Amazonia } Cooperative LBA Airborne Regional Experiment 1998 (LBA-CLAIRE-98) campaign, we measured the atmospheric mixing ratios of di!erent species of VOC at a ground station at Balbina, Amazonia. The station was located 100 km north of Manaus, SE of the Balbina reservoir, with 200}1000 km of pristine forest in the prevailing wind directions. Sampling methods included DNPH-coated cartridges for carbonyls and cartridges "lled with graphitic carbons of di!erent surface characteristics for other VOCs. The most prominent VOC species present in air were formaldehyde and isoprene, each up to several ppb. Concentrations of methylvinyl ketone as well as methacroleine, both oxidation products of isoprene, were relatively low, indicating a very low oxidation capacity in the lower atmospheric boundary layer, which is in agreement with a daily ozone maximum of (20 ppb. Total monoterpene concentration was below 1 ppb. We detected only very low amounts of VOC species, such as benzene, deriving exclusively from anthropogenic sources.

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Field measurement evidence for an atmospheric chemical source of formic and acetic acids in the tropic

Cited by 21 publications

References 23 publications

Global distribution and variability of formic acid as observed by MIPAS‐ENVISAT

Global distribution and variability of formic acid as observed by MIPAS‐ENVISAT

Formic acid above the Jungfraujoch during 1985–2007: observed variability, seasonality, but no long-term background evolution

Atmospheric volatile organic compounds (VOC) at a remote tropical forest site in central Amazonia

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