Sources and sinks of carbonyl sulfide in an agricultural field in the Southern Great Plains
Abstract
We report observations of ecosystem carbonyl sulfide (COS) and CO 2 fluxes that resolve key gaps in an emerging framework for using concurrent COS and CO 2 measurements to quantify terrestrial gross primary productivity. We show for the first time that leaf relative uptake ratios of COS and CO 2 during photosynthesis measured in the field vary systematically with light. We established that nocturnal COS uptake by vegetation is a significant component of daily net ecosystem COS fluxes. We also quantified a close correlation of soil COS fluxes with soil temperature. The small soil contribution to net ecosystem fluxes confirms that vegetation uptake is the dominant ecosystem COS flux in the growing season, a prerequisite for COS-based flux partitioning approaches.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 09, 2014
- Source ID
- 10.1073/pnas.1319132111
Entities
People
- Dave Billesbach
- John Elliott Campbell
- Joseph A. Berry
- Kadmiel Maseyk
- Margaret S. Torn
- Mark Zahniser
- Ulli Seibt
Organizations
- Lawrence Berkeley National Laboratory
- Pierre and Marie Curie University
- University of California
- University of Nebraska–Lincoln