1. National Isotope Centre; GNS Science; Lower Hutt New Zealand
2. CIRES; University of Colorado at Boulder; Boulder Colorado USA
3. NOAA/ESRL; Boulder Colorado USA
4. INSTAAR; University of Colorado at Boulder; Boulder Colorado USA
5. Department of Meteorology; Pennsylvania State University; University Park Pennsylvania USA
6. Department of Chemistry; Purdue University; West Lafayette Indiana USA
7. School of Life Sciences; Arizona State University; Tempe Arizona USA