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BLAST II - Bromine Latitudinal Air/Sea Transect II (1994)

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Abstract

This cruise was a continuation of the BLAST 94 mission in order to verify findings from the first cruise. In addition to all compounds that were measured during BLAST 94, we added some other halogenated methanes. The cruise led our team through the Atlantic ocean, covered an equally wide latitudinal range as BLAST 94, similar oceanic regimes such as coastal and coastally influenced waters, upwelling regions and open ocean gyres, but slightly different seasons, fall in the northern hemisphere and spring in the southern hemisphere. The entire cruise was almost 5 weeks long and was conducted between 18 October, 1994 and 21 November, 1994. The data for methyl bromide basically confirmed what we saw during BLAST 94 and contributed valuable information to our database for methyl halides. 

Methods and list of (the most important) measured compounds:

Gas chromatograph / mass spectrometer combination:
HCFC-22 CHClF2
CFC-12 CCl2F2
Methyl chloride CH3Cl 
CFC-114 C2Cl2F4
Halon-1211 CBrClF2
Methyl bromide CH3Br 
CFC-11 CCl3F
Methyl iodide CH3
Methyl chloroform CH3CCl3
Carbon tetrachloride CCl4
Dibromomethane CH2Br2
Perchloroethylene (PCE) C2Cl4
Bromoform CHBr3
Gas chromatograph / electron capture detector (deepwater):
Methyl bromide CH3Br 
CFC-12 CCl2F2
Methyl chloride CH3Cl 
Nitrous Oxide N2
Gas chromatograph / electron capture detector (surface water):
CFC-12 CCl2F2
CFC-11 CCl3
CFC-113 CCl3CF3
Methyl chloroform CH3CCl3
Carbon tetrachloride CCl4
Nitrous Oxide N2
Sulfur Hexafluoride SF6

Cruise Participants: