Two different methods are being employed in the MELNHE plots: the Granier method and the heat ratio method (HRM) Heat-based sapflow techniques are the most widely used methods for sapflow measurement
An improvement of the compensation heat pulse method by Burgess et al. (2001) Method being used by researchers at UNH, led by Heidi Asbjornsen Measures the ratio of the increase in temperature at points equidistant from the line heater following the release of a heat pulse
Dr. Michele Pruyn, Assistant Professor of Plant Biology, Plymouth State University Adan Hernandez, Graduate Student, University of New Hampshire Dr. Heidi Asbjornsen, Associate Professor of Ecosystem Ecology, University of New Hampshire Dr. Ruth Yanai, Professor of Forest and Natural Resources Management, SUNY ESF Craig See, Master’s Student, SUNY ESF Mark Green, Assistant Professor of Hydrology, Plymouth State University
Burgess, S.O. et al. (2001). An improved heat pulse method to measure low and reverse rates of sap flow in woody plants. Tree Physiology, 21, 589-598. Granier, A. et al. (1996). Transpiration of trees and forest stands: short and long-term monitoring using sapflow methods. Global Change Biology, 2, 265-274. Granier, A. et al. (1987). Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements. Tree Physiology, 3, 309-320. Kostner, B. et al. (1998). Sapflow measurements in forest stands: methods & uncertainties. Annals of Forest Science, 55, 13-27.