The trip with the Pipistrel Virus SW aircraft will start on 19 April in Ljubljana, Lenarčič told the press on Thursday.

Flying over the Netherlands, the North Pole, Canada, the Atlantic Ocean and Ireland, Lenarčič plans to return to Slovenia in three to four weeks, depending on the weather.

According to Pipistrel CEO Ivo Boscarol, some adjustments were needed to the aircraft in which Lenarčič made his second solo flight around the world without a copilot or additional air support a year ago to make sure it would cope with the extreme conditions of the North Pole.

"A lot will depend on the ingenuity of Matevž Lenarčič, but he has proven he is up to the task many times before," Boscarol said. His only fear is that the aircraft would need to crash land on the ice. If it were forced to land on water it would not sink, but it could also not take off again, he explained.

Like Lenarčič's previous flights, this one will also be environmentally-oriented, as he will be measuring the emissions of black carbon in the atmosphere and the effects of global warming, which has never been done before.

So far, measurement has only been conducted from the Earth's surface or from the altitude of 10,000 metres, Irena Ježek of Aerosol, a company developing and producing scientific instruments, told today's press conference.

Lenarčič's flight will be broadcast over the internet and sponsored by the Slovenian Foreign Ministry, among other institutions.

The ministry sees the project as a chance to promote Slovenia and the brand "I feel Slovenia", which is why Slovenian diplomatic representation offices will also be included in it.

The Slovenian Embassy in Copenhagen and the Danish international press centre will on 19 April organise an international press conference at which Lenarčič, Boscarol and acclaimed Danish scientists will present the project.

The Slovenian adventurer was the first person to circle the globe in an ultralight airplane without a copilot or additional air support in 2004.

Flying the Pipistrel Sinus 912 UL aircraft, which weighs a mere 284 kilograms, Lenarčič also set a speed record in the category of airplanes under 500 kilograms then.

During last year's flight, he became the first Slovenian to land on Antarctica and the first Slovenian to make a flyover of Mt Everest.