Synonyms: 
Atmospheric Tomography Mission
Associated content: 

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

Strong impact of wildfires on the abundance and aging of black carbon in the lowermost stratosphere

Ditas, J., et al. (2018), Strong impact of wildfires on the abundance and aging of black carbon in the lowermost stratosphere, Proc. Natl. Acad. Sci., 811595-11603, doi:10.1073/pnas.1806868115.

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