GrainGenes Reference Report: PEN-19-495
Reference
PEN-19-495
Title
Free Air Temperature Increase (FATI): a new tool to study global warming effects on plants in the field
Journal
Plant, Cell and Environment
Year
1996
Volume
19
Pages
495-502
Author
[ Hide all but 1 of 6 ] Nijs I Kockelbergh F Teughels H Blum H Hendrey G Impens I
Abstract
A new technique, called Free Air Temperature Increase (FATI), was developed to artificially induce increased canopy temperature in field conditions without the use of enclosures This acronym was chosen in analogy with FACE (Free Air CO2 Enrichment), a technique which produces elevated CO2 concentrations [CO2] in open field conditions The FATI system simulates global warming in small ecosystems of limited height, using infrared heaters from which all radiation below 800 nm is removed by selective cut-off filters to avoid undesirable photomorphogenetic effects An electronic control circuit tracks the ambient canopy temperature in an unheated reference plot with thermocouples, and modulates the radiant energy from the lamps to produce a 2.5 degrees C increment in the canopy temperature of an associated heated plot (continuously day and night) This pre-set target differential is relatively constant over time due to the fast response of the lamps and the use of a proportional action controller (the standard deviation of this increment was <1 degrees C in a 3 week field study with 1007 measurements). Furthermore, the increase in leaf temperature does not depend on the vertical position within the canopy or on the height of the stand. Possible applications and alternative designs are discussed.
Keyword
air-temperature
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PEN-19-495
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||