CO 2 is the most important greenhouse gas and its modulation by the biosphere is of fundamental importance to our understanding of global climate change. A new technique for vertical profiling of CO 2 and meteorological parameters from the ground to 3 km was proposed. Vertical profiling of CO 2 mixing ratios allowed estimates of landscape-scale fluxes characteristic of ≈ 100 sq km of an ecosystem. The method made use of a powered parachute as a platform and a new Tedlar™ bag air sampling technique. Air samples were returned to the ground where measurements of CO 2 mixing ratios were made with high precision (≤ 0.1%) and accuracy (≤ 0.1%) using a conventional CO 2 analyzer. Laboratory studies that characterize the accuracy and precision of the bag sampling technique as well as diffusion through the Tedlar™ bag wall were described. The technique was in field studies near two Ameriflux sites and the data used to calculate fluxes. This is an abstract of a paper originally presented at the 225th ACS National Meeting (New Orleans, LA 3/23-27/2003).
|Original language||English (US)|
|Number of pages||2|
|Journal||ACS, Division of Environmental Chemistry - Preprints of Extended Abstracts|
|State||Published - Dec 1 2003|
|Event||225th ACS National Meeting - New Orleans, LA, United States|
Duration: Mar 23 2003 → Mar 27 2003
All Science Journal Classification (ASJC) codes