BCI is an island that was isolated from the surrounding mainland in 1914 following the damming of the Chagres River and the formation of Gatun Lake. The island, rising 137m above Lake Gatun, has an area of 1500 ha which are covered by forest that has remained relatively undisturbed for at least 100 years.

The island receives an average of 2623 mm of rain per year. Daytime temperatures reach an average of 32°C, with nighttime lows of approximately 23°C. The meteorological year is divided into two parts: a pronounced dry season (approximately from mid-December to the end of April), and a wet season (May to mid-December). On average, only 285 mm of rain falls during the dry season. Relative humidity, soil moisture, air pressure, solar radiation, evapotranspiration, wind speed and direction all show marked wet/dry season differences. On the other hand, temperature varies relatively little throughout the year.

The AVA tower was originally established in March of 2011 as part of the ForestGEO climate-monitoring program for the BCI 50 Ha plot. The tower was damaged by a tree fall in mid-2018 and all sensors were off-line until Feb. 2019. As of 2019, the tower’s meteorological sensors are part of STRI’s Physical Monitoring Program.

AVA Tower

Location: 9.1566’N, 79.84828’W

For a summary of the must recent data collected, please click bellow.


ParametersSensor ModelMethods
RainfallCampbell Sci. TB4 tipping bucket⬇️
Solar Radiation PARKipp&Zonen PQS1⬇️
Solar RadiationKipp&Zonen CMP3⬇️
PyranometerKipp&Zonen CMP11⬇️
Temperature & RHCampbell Sci. CS215⬇️
WindRM Young 05103 anemometer⬇️
Sensor manuals in .pdf format are available for download here.

Data Download

(max, min, average)
5 minCelsius⬇️
Rain (total)5 minmm⬇️
Relative Humidity
(max, min, average)
5 min%⬇️
Solar Radiation PAR5 min⬇️
Solar Radiation Pyranometer5 min⬇️
Wind Direction (degrees)5 min⬇️
Wind Speed (km/h)5 min⬇️
Data is available for download here.

Please read our data use policy before using any data from this page.