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- Title
Prototype campaign assessment of disturbance-induced tree loss effects on surface properties for atmospheric modeling.
- Authors
CAMILO VILLEGAS, JUAN; LAW, DARIN J.; STARK, SCOTT C.; BRESHEARS, DAVID D.; SALESKA, SCOTT R.; SWANN, ABIGAIL L. S.; GARCIA, ELIZABETH S.; BELLA, ELIZABETH M.; MORTON, JOHN M.; COBB, NEIL S.; BARRON-GAFFORD, GREG A.; LITVAK, MARCY E.; KOLB, THOMAS E.
- Abstract
Changes in large-scale vegetation structure triggered by processes such as deforestation, wildfires, and tree die-off alter surface structure, energy balance, and associated albedo—all critical for land surface models. Characterizing these properties usually requires long-term data, precluding characterization of rapid vegetation changes such as those increasingly occurring in the Anthropocene. Consequently, the characterization of rapid events is limited and only possible in a few specific areas. We use a campaign approach to characterize surface properties associated with vegetation structure. In our approach, a profiling LiDAR and hemispherical image analyses quantify vegetation structure and a portable mast instrumented with a net radiometer, wind–humidity–temperature stations in a vertical profile, and soil temperature–heat flux characterize surface properties. We illustrate the application of our approach in two forest types (boreal and semiarid) with disturbance-induced tree loss. Our prototype characterizes major structural changes associated with tree loss, changes in vertical wind profiles, surface roughness energy balance partitioning, a proxy for NDVI (Normalized Differential Vegetation Index), and albedo. Multi-day albedo estimates, which differed between control and disturbed areas, were similar to tower-based multi-year characterizations, highlighting the utility and potential of the campaign approach. Our prototype provides general characterization of surface and boundary-layer properties relevant for land surface models, strategically enabling preliminary characterization of rapid vegetation disturbance events.
- Publication
Ecosphere, 2017, Vol 8, Issue 3, p1
- ISSN
2150-8925
- Publication type
Article
- DOI
10.1002/ecs2.1698