title: Response of Cassava canopy to mid-day pseudo sunrise induced by solar eclipse.
abstract: Variations in CO(2) concentration over a cassava canopy were measured during a solar eclipse at Thiruvananthapuram, India. The analysis presented attempts to differentiate between the eclipse effect and the possible effect of thick clouds, taking CO(2) as a proxy for photosynthesis. CO(2) and water vapor were measured at a rate of 10 Hz, and radiation at 1 Hz, together with other meteorological parameters. A rapid reduction in CO(2) observed post-peak eclipse, due apparently to intense photosynthesis, appears similar to what happens at daybreak/post-sunrise. The increase in CO(2) (4 ppm) during peak eclipse, with radiation levels falling below the photosynthesis cut-off for cassava, indicates domination of respiration due to the light-limiting conditions.
authors: Indian Institute of Tropical Meteorology, Pashan, Pune, 411008, India. latha@tropmet.res.in
authors: R
authors: R
authors: Latha
authors: B S
authors: BS
authors: Murthy
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism*; D007194:India; D002365:Manihot / Q000502:physiology*; D010788:Photosynthesis; D018515:Plant Leaves / Q000502:physiology; D013472:Sunlight; D014867:Water / Q000378:metabolism
chemical_list: D014867:Water; D002245:Carbon Dioxide