Synonyms: 
Atmospheric Tomography Mission
Associated content: 

A new method to quantify mineral dust and other aerosol species from aircraft platforms using single-particle mass spectrometry

Ocean Biogeochemistry Control on the Marine Emissions of Brominated Very Short‐Lived Ozone‐Depleting Substances: A Machine‐Learning Approach

Novel approaches to improve estimates of short-lived halocarbon emissions during summer from the Southern Ocean using airborne observations

Radiance-based retrieval bias mitigation for the MOPITT instrument: the version 8 product

Deeter, M., et al. (2019), Radiance-based retrieval bias mitigation for the MOPITT instrument: the version 8 product, Atmos. Meas. Tech., 12, 4561-4580, doi:10.5194/amt-12-4561-2019.

The 2015–2016 carbon cycle as seen from OCO-2 and the global in situ network

Crowell, S., et al. (2019), The 2015–2016 carbon cycle as seen from OCO-2 and the global in situ network, Atmos. Chem. Phys., 19, 9797-9831, doi:10.5194/acp-19-9797-2019.

A large source of cloud condensation nuclei from new particle formation in the tropics

Williamson, C., et al. (2019), A large source of cloud condensation nuclei from new particle formation in the tropics, Nature, 574, 399-403, doi:10.1038/s41586-019-1638-9.

Atmospheric Acetaldehyde: Importance of Air‐Sea Exchange and a Missing Source in the Remote Troposphere

NOAA Iodide Ion Time-of-Flight Chemical Ionization Mass Spectrometer

Iodide Ion ToF (Time-of-Flight) CIMS (Chemical Ionization Mass Spectrometer)

Principle of the Measurement

Chemical ionization mass spectrometric detection of gas phase organic and inorganic analytes via I- adduct formation

Species Measured

Reactive nitrogen species: HNO3 (nitric acid), HONO (nitrous acid), HO2NO2 (peroxynitric acid), N2O5 (dinitrogen pentoxide), HNCO (isocyanic acid) 
Halogen Species: ClNO2, HCl, HBr, HOBr, HOCl, Cl2, Br2 
Low to intermediate volatility organic species

Time Response

Instrumental response <1 sec, Field response is limited by inlet surface affinity for a particular species

Detection Limit

Precision on 1s data various by species

Accuracy

(15% + 1 pptv) for N2O5
(20% + 1 pptv) for ClNO2
(30% + 15 pptv) for HONO
(25% + 10 pptv) for HO2NO2
(15% + 15 pptv) for HNO3
(20% + 5 pptv) for HNCO
(20% + 15 pptv) for HCOOH
(30% + 1 pptv) for halogenated species

Manufacturer

TOFWERK/Aerodyne Research Inc. (modified)

Instrument Type: 
Measurements: 
Aircraft: 
Point(s) of Contact: 

The potential role of methanesulfonic acid (MSA) in aerosol formation and growth and the associated radiative forcings

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