… formic acid than all other known chemical sources combined. Our findings reconcile model
predictions and measurements of formic acid … a large, ubiquitous chemical source of HCOOH …

… atmospheric phenomena could provide with materials and energy sources for an abundant
production of formic acid in … demonstrated that in an atmospheric lightning-induced chemistry …

… Formic and acetic acids are ubiquitous in the troposphere, playing an important role in the
… The lifetime of atmospheric formic acid is reported as 3.2 days or even as long as 4.5 days in …

… of atmospheric formic acid (FACD), its sources, and its sinks in the southeastern US. The
Yorkville site is in a rural area, with few, non-biogenic sources of formic acid and formic acid …

… Atmospheric formic acid (FA) and acetic acid (AA) mixing ratios are often underestimated in
atmospheric … the ubiquitous and abundant non-methane hydrocarbon isoprene (C 5 H 8 ). …

… in atmospheric chemistry, the sources/sinks and gas–particle partitioning of formic acid is not
… Organic acids are ubiquitous in the troposphere and have been detected in both gas and …

… , the HCOOH sources are not well understood. In a recent field study, we measured atmospheric
HCOOH … of HCOOH sources and model simulations of ambient HCOOH concentrations. …

… implies an average atmospheric lifetime of … atmosphere, due to its reprocessing by clouds.
The combined new findings of this work allow an estimate of global atmospheric formic acid …

… We find that (i) OH oxidation of MACR, IEPOX, and ISOPOOH are sources of formic acid, (ii) …
NO OH experiments for formic acid, we subtract a timeseries of formic acid taken from the …

… two molar equivalents of formic acid and one of acetic acid. We incorporate this chemistry
and that of 2-methyltetrol, another ubiquitous iSOA component, into the GEOS-Chem global …