DOI: 10.5281/zenodo.17220023
title: Observations and Atmospheric Simulations of Trifluoroacetate (TFA) in Precipitation and Surface Waters in Switzerland

description: This record contains observations and simulations of trifluoroacetate (TFA) concentrations in Swiss precipitation and surface waters as presented by Henne et al., (2025). All relevant description of observational methods, sampling strategies and simulation details can be found there.

Relevant metadata is contained within the individual files. A short summary is given below.

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Contained files:



Swiss_TFA_observations_BAFU_20240725.xlsx: Individual TFA observations for different sample types and locations.



 Format: excel spreadsheet (xlsx)

Relevant columns:



Type, type of sample location and media, possible values: precipitation, Surface water Lake, Surface water River

PointOfMeasurement_ID, site identifier, given as character

PointOfMeasurement_Name, site full name, given as character

Coord_X, site location x position in Swiss LV95 coordinates

Coord_Y, site location y position in Swiss LV95 coordinates

Sampling Type, type of sample collection, possible values: Total sample, Grab sample, Total sample - flow proportional, Total sample - time proportional

Compound, analysed compound, possible values: TFA, reported as as trifluoroacetic acid (protonated, molar mass 114 g/mol). 

Value, concentration of analysed compound, given as float

Units, concentration units, possible vlaues: ug/l



TFA measurement technique was described by Scheurer et al. (2017)



FLEXPART_simulations_at_sites_daily.nc: Simulated time series of HFO-1234yf and degradation products at selected sites



Format: netcdf 4

Model variables



HFO_1234yf: atmospheric mole fractions

TFA_WD: TFA deposited through wet deposition 

TFA_DD: TFA deposited through dry deposition 

TFA_rain: TFA concentration in rainwater





FLEXPART_simulations_monthly.nc: Simulated HFO-1234yf mole fraction and deposition of degradation products



Format: netcdf 4

Model variables



HFO_1234yf: atmospheric mole fractions

TFA_WD: TFA deposited through wet deposition 

TFA_DD: TFA deposited through dry deposition 

TFA_rain: TFA concentration in rainwater





TFA_deposition_from_longLived_compounds.nc: Simulated monthly TFA deposition rates from degradation of long-lived HCFC/HFCs



Format: netcdf 4

Model variables (compound <cmp> stands for each treated HCFC/HFC and 'Total' for the sum over all compounds):



<cmp>_min:  TFA deposition rate given minimal TFA yields (northern hemisphere average)

<cmp>_max: TFA deposition rate given maximal TFA yields (northern hemisphere average)

<cmp>_mean: TFA deposition rate given mean TFA yields (northern hemisphere average)