335-6 Examining the Responses of Radiation Use Efficiency to CO2: A New Approach.

See more from this Division: ASA Section: Climatology & Modeling
See more from this Session: General Global Climate Change: II

Wednesday, November 6, 2013: 9:20 AM
Tampa Convention Center, Room 33

Oscar Monje, AECON, Kennedy Space Center, FL
Abstract:
Radiation use efficiency (RUE) has been a key parameter for developing simpler models of crop growth and yield. A great deal of effort has gone into measuring RUE in the field and in verifying its validity for predicting crop growth. However, a lack of data on responses of RUE to elevated CO2 has resulted in the use of empirical relations that may lead to overestimates of crop yield to CO2 enrichment. RUE measured in controlled environments has been shown to overestimate CO2 responses when side lighting or other chamber factors are not accounted for. A new approach for deriving RUE from canopy quantum yield is presented that offers a theoretical basis for estimating RUE responses to elevated CO2.

See more from this Division: ASA Section: Climatology & Modeling
See more from this Session: General Global Climate Change: II