Measuring Tree Properties and Responses Using Low-Cost Accelerometers

Autor(es)

van Emmerik, Tim ; Steele-Dunne, Susan ; Hut, Rolf ; Gentine, Pierre ; Guerin, Marceau ; Oliveira, Rafael S. ; Wagner, Jim ; Selker, John ; van de Giesen, Nick

• Tipo de documento: Artigo Científico
• Fonte: SENSORS; v. 17, n. 5 MAY 2017.
• Citações Web of Science: 9

Resumo

Trees play a crucial role in the water, carbon and nitrogen cycle on local, regional and global scales. Understanding the exchange of momentum, heat, water, and CO2 between trees and the atmosphere is important to assess the impact of drought, deforestation and climate change. Unfortunately, ground measurements of tree properties such as mass and canopy interception of precipitation are often expensive or difficult due to challenging environments. This paper aims to demonstrate the concept of using robust and affordable accelerometers to measure tree properties and responses. Tree sway is dependent on mass, canopy structure, drag coefficient, and wind forcing. By measuring tree acceleration, we can relate the tree motion to external forcing (e.g., wind, precipitation and related canopy interception) and tree physical properties (e.g., mass, elasticity). Using five months of acceleration data of 19 trees in the Brazilian Amazon, we show that the frequency spectrum of tree sway is related to mass, canopy interception of precipitation, and canopy-atmosphere turbulent exchange. (AU)

• Processo FAPESP: 13/50531-2 - Controles ecofisiológicos sobre a sazonalidade e variabilidade da precipitação na Amazônia
• Beneficiário: Laura de Simone Borma
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular