Air Sampling from Ships of Opportunity by NOAA ESRL Status Report for JCOMM/SOT-IV 16 -21 April 2007 Geneva, Switzerland Ed Dlugokencky National Oceanic and Atmospheric Administration Earth System Research Laboratory Boulder, Colorado
Rationale -Measure large-scale spatial gradients for CO 2 ( 13 C, 18 O), CH 4 ( 13 C, D), CO, H 2, N 2 O, and SF 6. -Use observed gradients with ATM to quantify sources and sinks. -Provides top-down constraint on GHG budgets.
Species Analyzed in Samples from the Cooperative Global Air Sampling Network Species Start Method Repeatability CO 2 1967 NDIR 0. 07 ppm CH 4 1983 GC/FID 1 ppb CO 1988 GC/RGD 0. 5 ppb H 2 1988 GC/RGD 2 ppb 13 C, CO 2 1990 IRMS 0. 01‰ 18 O, CO 2 1990 IRMS 0. 03‰ N 2 O 1996 GC/ECD 0. 2 ppb SF 6 1996 CG/ECD 0. 03 ppt 13 C, CH 4 1998 GC/IRMS 0. 06‰ D, CH 4 2005 GC/IRMS 1. 5‰
Time Series
ITCZ SPCZ
Future Plans Continue: Albert Rickmers (LA - Auckland) Kapitan Afanasyev (LA – Auckland) Replace: NY - Capetown New Routes: Gulf of Mexico-Mediterranean St. Johns-Reykjavik Singapore-Hong Kong New Technology: Automated Sampler
Acknowledgements Steve Cook Derrick Snowden Carrie Wolfe Tim Kenefick Jim Farrington Captains and Officers of: Albert Rickmers Kapitan Afanasyev
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