Particulate ship emissions measured at Utö May 2022 - October 2023

This dataset of ship exhaus plumes has been collected at the Utö Atmospheric and Marine Research station from May 2022 to October 2023. It is linked to a publication submitted in Atmospheric Chemistry and Physics in September 2026. The methods for collecting the data are described in the publication (link provided later).

Below are the explanations for the data columns. 
Units are expressed in square brackets.
The number in the end of the column refers to the wavelength in nanometers.
"Area" refers to the integral of the measured concentration over the plume duration.
"ER" refers to the emission rate (i.e., measured area of the pollutant divided by the measured area of CO2 concentration)
"N", "Abs", "Sca", "eBC", and "BrC" refer to number concentration, absorption coefficient, scattering coefficient, equivalent black carbon, and brown carbon, respectively.

ID: Plume ID in the format of yyyymmdd_ndx, where the ndx in the number of the plume observed that day, []
startTime: Plume start time, []
endTime: Plume end time, []
shipSpeed: Speed of the ship based on AIS data and trajectory analysis, [kn]
shipTrueHeading: True heading of the ship based on AIS data and trajectory analysis, [degrees]
shipCoG: Course on ground of the ship based on AIS data and trajectory analysis, [degrees]
shipLat: Ship latitude coordinate based on AIS data and trajectory analysis, [degrees]
shipLon: Ship longitude coordinate based on AIS data and trajectory analysis, [degrees]
shipDist: Ship distance to the measurement station based on AIS data and trajectory analysis, [m]
windSpeed: Average wind speed during the plume, [m s-1]
windDir: Average wind direction during the plume, [degrees] 
shipScrubber: Boolean for ship scrubber [0 for no scrubber / 1 for scrubber]
shipWidth: Width of the ship, [m]
shipLength: Length of the ship, [m]
shipDraught: Draught of the ship, [m]
shipBuildYear: Ship build year, []
shipType: Type of the ship - roll-in roll-out (RORO); general cargo (GC); chemical and product tankers (TAN); passenger cruisers (PAS); fishing boats (FISH); and a bulk carrier (BULK), []
shipMePower: Power of the ship main engine, [kW] 
shipMeStroke: Stroke of the ship main engine, []
engineLoad: Modeled engine load of the ship, []
nEngines: Number of ship engines, []
plumeDuration: Duration of the observed plume, []
plumeAge: Age of the plume based on wind speed and distance of the ship, []
areaeBC: Area of the equivalent black carbon concentration, [g s m-3]
areaCO2: Area of the CO2 concentration, [g s m-3]
areaN: Area of the number concentration, [s cm-3]
areaAbs370: Area of the absorption coefficient at 370 nm, [s Mm-1]
areaAbs470: Area of the absorption coefficient at 470 nm, [s Mm-1]
areaAbs520: Area of the absorption coefficient at 520 nm, [s Mm-1]
areaAbs590: Area of the absorption coefficient at 590 nm, [s Mm-1]
areaAbs660: Area of the absorption coefficient at 660 nm, [s Mm-1]
areaAbs880: Area of the absorption coefficient at 880 nm, [s Mm-1]
areaAbs950: Area of the absorption coefficient at 950 nm, [s Mm-1]
areaSca425: Area of the scattering coefficient at 425 nm, [s Mm-1]
areaSca525: Area of the scattering coefficient at 525 nm, [s Mm-1]
areaSca700: Area of the scattering coefficient at 700 nm, [s Mm-1]
ERSca525: Emission rate for scattering coefficient at 525 nm, [m2 g-1]
EReBC880: Emisison rate for black carbon at 880 nm, []
ERN: Emission rate for particle number concentration, [*10^12 g-1]
ERAbsBrc470: Emission rate for brown carbon related absorption coefficient at 470 nm, [m2 g-1]
AAE470n950: Absorption Angstrom exponent between the wavelength pair 470 and 950 nm, []
SSA525: Aerosol single scattering albedo at 525 nm, []