The Observatory Adopts Environmentally Friendly Radiosondes

The Hong Kong Observatory recently adopted a new model of environmentally friendly radiosondes to replace the traditional ones used for years. This initiative aims at reducing the environmental impact of meteorological observation activities.

Similar to the practices of other meteorological centres around the world, the Observatory normally conducts upper-air observations twice daily. A radiosonde is attached to a balloon and launched to measure the upper-air temperature, humidity, atmospheric pressure, wind direction and wind speed, providing essential data for weather monitoring and forecasting. After the observation is completed, the radiosonde will descend by parachute to the sea or land and will not be re-used.

The outer case of the new radiosonde is made from biodegradable natural fibers that can decompose completely in the natural environment. Compared to the traditional polystyrene foam case, the new radiosonde significantly reduces its environmental impact after use. The Observatory's adoption of environmentally friendly radiosondes aligns with the World Meteorological Organization's goal of promoting more environmentally sustainable observation methods and technologies.

An environmentally friendly radiosonde (inset) attached to a weather balloon was being launched by the Automatic Upper-air Sounding System at the King's Park Meteorological Station