Vegetation Ecology Lab / 植群生態研究室

Institute of Ecology and Evolutionary Biology, National Taiwan University

User Tools

Weather station in the saddle between Lalashan and Tamanshan

Beside the 1-ha Lalashan Forest Dynamics Plot, we setup a standard weather staion in the saddle.


We measure and record different microclimatic factors using various sensors.


The wind monitor measures wind direction and wind speed simultaneously.


The visibility sensor measures the visibility of the atmosphere, when the visibility is lower than 1000 m, it is defined as foggy time.


The quantum sensor measures the photon amount of visible light (400-700 nm wavelength) and records it as Photosynthetic Photon Flux Density (PPFD). The UVB sensor measures the UVB radiation energy.

Temperature and Relative humidity

The Temp/RH sensor measures the air temperature and relative humidity.


The rain gauge monitors the amount of precipitation.

Other parts

Solar panel

The solar panel converts the solar energy to charge the battery of the weather station.

Logger box

The box contains the datalogger which records and stores all the microclimatic measurements and the battery.

Clear day vs Foggy day

To date, we have recorded the microclimate for over one year. Here is the diurnal variation showing the difference between a clear day and a foggy day. The fog usually comes in the afternoon, causing a drop in the air temperature, the visibility and the PPFD, and an increase in relative humidity.