1a.Objectives (from AD-416):
Science direction for SMAP mission. Specifically the investigation of applicability of the SMAP mission to watershed and ecosysytem management decisions in the southwest.
1b.Approach (from AD-416):
Using existing and developing data assimilation and data fusion techniques to
combine SMAP provided data and products with existing knowledge of the watershed
environment in a modeling framework to produce information and tools which will be of value to researchers and policymakers.
New satellite sensors are planned to measure plant fluorescence (F) to monitor plant health on a regular basis over large agricultural regions. In a greenhouse study, we found that F was directly related to plant photosynthesis and could be used to track the status, resilience, and recovery of photochemical processes. Therefore, satellite-based measurements of F may provide a rapid assessment of plant stress to guide farmers in resource applications. A field study of nitrogen-stressed wheat conducted in 2011 and 2012 will provide data to validate and extend these findings. This project contributes to objective 1 of the in-house project.