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DCOTSS

UNH Mercury (UNHMERC)

Status

Operated By:

UNHMERC instrument onboard the NASA DC-8 during the INTEX-B mission over the North Pacific.

The UNHMERC instrument provides detailed information on atmospheric mercury. Measurements of total gaseous mercury (TGM) and gaseous elemental mercury (Hg°) are performed simultaneously with one minute time resolution using a custom four-channel atomic fluorescence spectrometer. The relative amount of reactive gaseous mercury (RGM = HgCl2 + HgBr2+ HgOBr + …) will be assessed through careful examination of the difference between TGM and Hg°. TGM is defined as the sum Hg° + RGM. Targeted aerosol sampling will also be conducted for particulate-phase mercury (HgP).

Instrument Type:

Fluorescence, Spectrometer (in situ)

Measurements:

Aircraft:

DC-8 - AFRC

Point(s) of Contact:

Robert Talbot (POC; PI)

Additional Information

Publications:

Talbot, R., et al. (2007), Total depletion of Hg° in the upper troposphere - lower stratosphere, Geophys. Res. Lett., 34, 10, doi:28.