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[TXT]BLASTIII_air_data.prn09-Nov-2006 16:51 117K 
[   ]BLASTIII_airwatermet.xls09-Nov-2006 16:52 854K 
[TXT]BLASTIII_met_data.prn09-Nov-2006 16:52 250K 
[TXT]BLASTIII_water_data.prn09-Nov-2006 16:52 142K 
[TXT]BLASTII_air_data.prn09-Nov-2006 16:52 109K 
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[TXT]BLASTII_water_data.prn09-Nov-2006 16:53 125K 
[TXT]BLASTI_air_data.prn09-Nov-2006 16:53 74K 
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[TXT]Clivar01_air_data.prn09-Nov-2006 16:54 183K 
[   ]Clivar01_airwatermet.xls09-Nov-2006 16:54 1.0M 
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[TXT]Clivar01_water_data.prn09-Nov-2006 16:55 67K 
[TXT]GasEx98_air_data.prn09-Nov-2006 16:55 191K 
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[TXT]PHASE1_air_data.prn09-Nov-2006 17:09 134K 
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[TXT]RB9906_air_data.prn09-Nov-2006 17:10 113K 
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[TXT]README13-Jul-2011 19:02 3.6K 
[   ]Readme (31 Aug 2005).pdf09-Nov-2006 16:56 126K 

Please cite this data set as:

Elkins, J.W., J.H. Butler, B.D. Hall, and S.A. Montzka. 2006. NOAA/CMDL trace halocarbon 
data in the marine atmosphere, surface, and subsurface waters measured in 1994-2004. Carbon Dioxide Information 
Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, 
Tennessee. doi: 10.3334/CDIAC/otg.NOAA_CMDL_1994_2004

These research expeditions were conducted over a 10-year period with the primary objective of understanding more 
about the exchange of halocarbons across the air-sea interface and the role of the ocean in regulating the 
atmospheric composition of these gases. Questions regarding methyl bromide were the driver for the earlier 
cruises but, in later years, interest also began to focus on other methyl halides and polyhalogenated methanes. 
Although most of the very short lived (VSL) halocarbons analyzed were captured and referenced on all cruises, 
the lack of adequate and consistent scales precluded reporting these values as mixing ratios, partial pressures, 
or concentrations. Scales for CHBr3, CH2Br2, and CH3I were recently developed and the new scales have applied  
to their measurements on all of the cruises. Other VSL halocarbons, such as CH2BrCl, CHBr2Cl, 
CH3ClI and CH2I2 were detected on some of the cruises, but they were below detection limits on other cruises. 
At all times they were near limit of detection in the air. Although there were standards for some of the latter 
gases, their concentrations were not included in these tables at this time. The work is continued on developing 
reliable, consistent scales and values and they will be reported when completed.

These data are freely available to public. If you plan on publishing them in any way, please contact the responsible 
for these data PIs beforehand. Calibration scales can shift periodically by small amounts and the outhors continue 
to publish results based upon these data. However, in no way the outhors want to limit the data access to all who 
are interested, and they are willing to work with others who wish to analyze them.

Responcible PIs:
Project Leader: Dr. James H. Butler (303-497-6898);
Project Advisor: Dr. Stephen A. Montzka (303-497-6290)
Calibrations: Dr. Bradley D. Hall (303-497-7011)
Halocarbon Group Chief: Dr. James W. Elkins (303-497-6224)

This research would not have been possible without the exceptionally dedicated, skilled, and focused efforts of the 
post docs and Research Associates who built the instrumentation, conducted the measurements at sea, at times led the 
expeditions, and processed and analyzed the data. These individuals, all of whom continued involvement in the effort 
to make the data available, are

• Dr. Jurgen M. Lobert (BLAST I, II, and III); now at Mykrolis Corporation, Billerica, MD, USA 01821
• Dr. Shari Yvon-Lewis (BLAST III, GasEx-98, BACPac, CLIVAR-01, PHASE I -04); now at Department of Oceanography, 
  Texas A&M University, College Station, TX, USA 77843
• Dr. Daniel King (GasEx-98, BACPac, CLIVAR-01, PHASE I-04); now at Department of Chemistry, Drexel University, 
  Philadelphia, PA, USA 19104

Additional contributors to these data sets include Richard Myers (NOAA), Dr. Laurie Geller (University of Colorado/CIRES), 
Andrew Clarke (University of Colorado/CIRES) and Debbie Mondeel (University of Colorado/CIRES), as well as colleagues 
and associates on these seven expeditions, who have provided assistance in a variety of ways to keep sampling systems 
and instruments running at virtually all times while underway.