Arctic greenhouse may lead to farms on Mars

Canada rocks!

RE: Arctic greenhouse may lead to farms on Mars

Lettuce, radishes and beets have been planted in a remote Arctic greenhouse, where researchers are learning how to grow crops without human contact in an environment that can't normally support edible plants.

Alain Berinstain, the Canadian Space Agency scientist in charge of the project, said no other greenhouse is designed to operate autonomously like the Arthur Clarke Mars Greenhouse on Devon Island in Nunavut.

"Every greenhouse needs … electrical power, it needs heat and it needs people, to some extent," said Berinstain, director of science and academic development at the space agency. "The way we provide the people is through a remote link."

On the flip side, humans will need greenhouse-grown plants to provide food and clean the air and water if they begin to spend a lot of time on another planet or the moon, Berinstain said

The greenhouse is at the Mars Institute's Haughton-Mars Project research station, which is staffed for just a few weeks each summer. The surrounding environment is a polar desert where temperatures can dip below freezing even in July and there is little annual precipitation.

"There's very little vegetation, [it's] very rocky," Berinstain said. "It's beautifully desolate."

The harsh conditions and rocky, Mars-like landscape make it a popular spot to test robots, space suits and other technology designed for use on other planets.

"Wherever we end up operating greenhouses on other planets, it will be an extreme environment," Berinstain said. "So it's about learning to work with a greenhouse that way."

The project was established in 2002 after the Canadian Space Agency heard the Mars Institute was interested in having a greenhouse at the research station.

The researchers visit every summer to set up a spring crop and a fall crop. They also upgrade the computer systems that let them monitor the plants and keep them watered and warm during the growing seasons.

The greenhouse is heated with propane during the summer, and the computers run on solar power. Water comes from a nearby stream and some of it is saved over the winter. The plants are monitored with webcams and sensors that detect the acidity of the nutrient solution, the water levels and the temperature.

When fall arrives, the propane runs out, the plants freeze and the computers are kept running with wind power during the 24-hour darkness of the Arctic winter...