Is there more oxygen in the air in the summer?
Try 3 issues of BBC Science Focus Magazine for £5!
Ignoring the dreaded hay fever, can we thank increased oxygen levels for helping us breathe a little easier in summer?
Asked by: Bill Ritchie, by email
In 1992, research by scientists at the US National Centre for Atmospheric Research in Boulder, Colorado showed that oxygen levels do indeed rise and fall with the seasons, reaching a peak in the summer months.
Increased release of oxygen by plants is part of the explanation, along with changes in the solubility of oxygen as the seas warm and cool. The changes are, however, too small for us to notice.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
May Half Price Sale
- Save up to 52% when you subscribe to BBC Science Focus Magazine.
- Risk - free offer! Cancel at any time when you subscribe via Direct Debit.
- FREE UK delivery.
- Stay up to date with the latest developments in the worlds of science and technology.