IGN 13-9 - Over what time-scales does precipitation influence plant and ecosystem fluxes?

Wednesday, August 9, 2017
C123, Oregon Convention Center
Kiona Ogle, School of Informatics, Computing, and Cyber Systems, Northern Arizona University, Flagstaff, AZ
Precipitation and associated moisture availability impact plant and ecosystem carbon and water fluxes over multiple time-scales. For example, responses to rains that increase moisture availability are often governed by prior (antecedent) conditions. Thus, we have developed a stochastic antecedent modeling framework to address questions such as: How do past moisture conditions influence plant and ecosystem responses to current conditions? And, over what time-scales? The approach has yielded surprising results about time lags and precipitation/drought legacies. Such results are based on statistical analyses of observational time-series, and this talk will highlight ideas for experimental approaches to evaluating time-scales of influence.