Atlantis Data Info

File prefixes from data download are listed below. The file contents are specified and the measurement is described briefly. For more details, see the header of the data file.

Time parameters

Time: Most of the Atlantis data is time-aligned to Start_UTC, which is 1 minute time resolution in integer seconds. The files that aren't aligned to Start_UTC are VOCsGCFID, which uses GCFID_Start_UTC / GCFID_Stop_UTC and ClNO2Cl2 which uses CIMStimewave.

Ship Parameters

ShipPos

Ship Position Parameters measured by GPS
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
Lat_deg: GPS Latitude (deg)
Lon_deg: GPS Longitude (deg)

ShipMet

Ship Meteorological Parameters measured with various sensors.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
AirTemp_degC: Air Temperature (C)
BaroP_mbar: Barometric Pressure (mbar)
RH_percent: Relative Humidity (%)
Rel_WD_deg: Relative Wind Direction (deg)
Rel_WS_m_s: Relative Wind Speed (m/s)
True_WD_deg: True Wind Direction (deg)
True_WS_m_s: True Wind Speed (m/s)

Chemical Parameters

ClNO2Cl2

ClNO2 and Cl2 measured using Chemical Ionization Mass Spectrometry (CIMS).
Time: 60 second data aligned to CIMStimewave
Reported parameter names and units:
Cl2_pptv: Cl2 (pptv)
ClNO2_pptv: ClNO2 (pptv)

Carbon monoxide measured using Vacuum-UV resonance fluorescence.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
CO_ppbv: CO (ppbv)

CO2

Carbon Dioxide measured using non-dispersive IR absorbance.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
CO2_ppmv: CO2 (ppmv)

H2O

Water vapor measured using Nondispersive IR.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
H2O_ppth: H2O (ppth)

HCHO

Formaldehyde measured using ???.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
HCHO_ppbv: NH3 (ppbv)

N2O5

Dinitrogen Pentoxide measured using Cavity ring-down spectroscopy.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
N2O5_pptv: N2O5 (pptv)

Nitric Oxide measured using NO/O3 Chemiluminescence.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
NO_ppbv: NO (ppbv)

NO2

Nitrogen Dioxide measured using Photolysis and NO/O3 Chemiluminescence.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
NO2_ppbv: NO2 (ppbv)

NOxCaRD

Reactive Nitrogen measured by Cavity Ring-Down Spectroscopy (CRDS).
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
NO2_CaRD_ppbv: NO2 (ppbv)
NOx_CaRD_ppbv: NOx (ppbv)
NO_CaRD_ppbv: NO (ppbv)

NOy

Total reactive Nitrogen Oxides measured using Au Converter and NO/O3 Chemiluminescence.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
NOy_ppbv: NOy (ppbv)

O3cl

Ozone measured using Chemiluminescence.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
O3cl_ppbv: O3 (ppbv)

O3uv

Ozone measured via UV absorbance (Thermo Environmental model 49c)
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
O3uv_ppbv: O3 (ppbv)

OCS

Carbonyl Sulfide measured using Chemical Ionization Mass Spectrometer (CIMS).
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
OCS_pptv: OCS (ppbv)

SO2

Sulfur Dioxide measured using UV Pulsed Fluorescence (TECO Model 43s)
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
SO2_ppbv: SO2 (ppbv)

VOCsGCFID

VOCs measured using Gas Chromatagraph and Flame-Ionization Detector (FID)
Time: Reported about every 15 minutes using GCFID_Start_UTC and GCFID_Stop_UTC, 5 minute sample time and 1 sample per 15 min
Reported parameter names and units:
Propane, iButane, nButane, nPentane, Ethyne, Ethene, Propene, Butene1, Toluene all in units of ppbv.

Radiation Parameters

jCH3CHO

Down-welling photolysis rate (J-Value) for CH3CHO measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jCH3CHO in units of Hz

jCH3COCH3

Down-welling photolysis rate (J-Value) for CH3COCH3 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jCH3COCH3 in units of Hz

jCH3OOH

Down-welling photolysis rate (J-Value) for CH3OOH3 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jCH3OOH3 in units of Hz

jCl2

Down-welling photolysis rate (J-Value) for Cl2 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jCl2 in units of Hz

jClNO2

Down-welling photolysis rate (J-Value) for ClNO2 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jClNO2 in units of Hz

jH2O2

Down-welling photolysis rate (J-Value) for H2O2 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jH2O2 in units of Hz

jHCHO

Down-welling photolysis rate (J-Value) for HCHO measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jHCHO in units of Hz

jHONO

Down-welling photolysis rate (J-Value) for HONO measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jHONO in units of Hz

jNO2

Down-welling photolysis rate (J-Value) for NO2 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jNO2 in units of Hz

jNO3

Down-welling photolysis rate (J-Value) for NO3 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jNO3 in units of Hz

jO3

Down-welling photolysis rate (J-Value) for O3 measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jO3 in units of Hz

jPAN

Down-welling photolysis rate (J-Value) for PAN measured using filter radiometry.
Time: 60 second data aligned to Start_UTC
Reported parameter names and units:
jPAN in units of Hz