Meteorological data during campaign
Meteorological variables including air temperature
(Tair), photosynthetic active radiation, wind speed, and
relative humidity were recorded at nearby weather stations during the
measurement campaign (Supporting information S4, Supporting information
S5). Air temperature and wind speed at 1.3 m height was recorded 200 m
away from the plot in a clearing using a permanently mounted weather
station (WeatherMate 3000, Environdata, Warwick, QLD, Australia). In
addition, a research grade weather station located on the jib of a 47m
height canopy access crane recorded air temperature and relative
humidity (HMP60, Vaisalla, Vantaa, Uusimaa, Finland), wind speed (YOUNG
Model 05103 Wind Monitor, R.M.Young, Traverse City, MI, USA), incoming
photosynthetic active radiation (SQ-521 full-spectrum quantum sensor,
Apogee, Logan, UT, USA) and precipitation with a tipping bucket rain
gauge (TB7, HyQuest Solutions, Warwick Farm, NSW, Australia) with data
recorded every one min via a networked datalogger (CR310, Campbell
Scientific, Logan, UT, USA). Gap filling of wind speed data from the
clearing was carried out by calibration of extant data against crane
meteorological station. We found multiplying wind speed measured at the
top of the canopy crane by a factor of 0.6 was a better predictor of
wind speed in the clearing than using a logarithmic wind profile.