Bowen Ratio versus Canopy Chamber CO 2 Fluxes on Sagebrush Rangeland

Hyperspectral remote sensing of sagebrush canopy nitrogen

Plant canopy nitrogen (N) is associated with ecosystem processes such as photosynthetic and aboveground net primary production, particularly in forested ecosystems. Sagebrush N is directly relatable to wildlife nutritional status and contributes to assessments of habitat quality, productivity, plant / soil water dynamics and controls on canopy photosynthesis. Hyperspectral remote sensing studie...

Remote sensing of sagebrush canopy nitrogen

Small-footprint Lidar Estimations of Sagebrush Canopy Characteristics

The height and shape of shrub canopies are critical measurements for characterizing shrub steppe rangelands. Remote sensing technologies might provide an efficient method to acquire these measurements across large areas. This study compared point-cloud and rasterized lidar data to field-measured sagebrush height and shape to quantify the correlation between field-based and lidar-derived estimat...

Impact of drought on canopy carbon and water fluxes

Modeling the impact of drought on canopy carbon and water fluxes through parameter optimization using an ensemble Kalman filter W. Ju, S. Wang, G. Yu, Y. Zhou, and H. Wang International Institute for Earth System Science, Nanjing University, Nanjing 210093, China Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China School of Geograp...

Canopy and leaf level 2-methyl-3-buten-2-ol fluxes from a ponderosa pine plantation

Canopy and leaf level 2-methyl-3-butene-2-ol (methylbutenol, MBO) emissions were measured from a ponderosa pine plantation in the Sierra Nevada mountains from July to October 1998. Canopy scale fluxes were measured using a gradient approach, leaf level fluxes used a flow-through chamber. Emissions were dependent on ambient light and temperature levels and showed a diurnal cycle very similar to ...