Print Email Facebook Twitter Chaos in the Canopy Title Chaos in the Canopy: Understanding the Uses of Fiber Optics in the Forest Author Vroom, Anika (TU Delft Civil Engineering & Geosciences) Contributor Coenders-Gerrits, Miriam (mentor) van der Valk, L.D. (graduation committee) van de Wiel, B.J.H. (graduation committee) van der Molen, Michiel (graduation committee) Degree granting institution Delft University of Technology Programme Civil Engineering Date 2023-07-04 Abstract This thesis explores the application of Distributed Temperature Sensing (DTS) technology to observe temperature gradients and turbulent eddies within and above a forest vegetation layer. Atmospheric temperature gradients tie directly to heat transfer, a primary mode of which are turbulent eddies. The goal in studying these elements is to enhance the understanding of land-atmosphere coupling, which plays a role in climate and weather modelling. The data collection took place in the first two weeks of November 2022 at a meteorology study site in Loobos, the Veluwe. A fiber optic cable was installed, running from the forest floor to 1.5 times the canopy height along a tower. The DTS technology provided high-resolution temperature measurements at one-second intervals. Fluctuations in these profiles could potentially be associated with turbulent eddies. By analyzing temperature profiles over time and integrating meteorological data, the study provided insights into the temporal evolution of vertical temperature distribution at the test site and its sensitivity to weather conditions. Phenomena such as direct sunlight, rainfall, canopy effects, and inversion layers were identified in the DTS data and validated with other meteorological measurements. Notably, sharp temperature inversions observed on two nights exhibited strong correlations with wind speed and its variation. Increases in wind speed and variability were associated with lower inversion heights. Subject DTStemperature sensingheat transfertemperature inversionsinversion characteristicsforest meteorologytemperature profile To reference this document use: http://resolver.tudelft.nl/uuid:6d51caaf-7cc5-47fd-8c2d-a29b22a508d7 Coordinates 52.166446, 5.743554 Part of collection Student theses Document type master thesis Rights © 2023 Anika Vroom Files PDF Vroom_Chaos_in_the_Canopy.pdf 10.57 MB Close viewer /islandora/object/uuid:6d51caaf-7cc5-47fd-8c2d-a29b22a508d7/datastream/OBJ/view