Arlyn Andrews, lead scientist, NOAA ESRL tall tower measurements, Pieter Tans, head NOAA ESRL Carbon Cycle Greenhouse Gases group, and Steve Brown, scientist, NOAA ESRL chemistry division, left to right, at the 1,000 foot "Tall Tower" observatory east of
KEN PAPALEO, Arlyn Andrews, lead scientist, NOAA ESRL tall tower measurements, Pieter Tans, head NOAA ESRL Carbon Cycle Greenhouse Gases group, and Steve Brown, scientist, NOAA ESRL chemistry division, left to right, at the 1,000 foot "Tall Tower" observatory east of (07/31/2007), [435261854] . Denver Public Library Digital Collections, accessed 07/03/2026, https://digital.denverlibrary.org/nodes/view/806091