Why is it so hard to gain enough Vitamin D by solar exposure in the European winter?

by Gunther Seckmeyer, Christopher Mustert, Michael Schrempf, Richard McKenzie, Ben Liley, Michael Kotkamp, Alkiviadis Bais, Didier Gillotay, Harry Slaper, Anna-Maria Siani, Andrew Smedley, Ann Webb
Published 2018-09-01

Evolution of observed ozone, trace gases, and meteorological variables over Arrival Heights, Antarctica (77.8°S, 166.7°E) during the 2019 Antarctic stratospheric sudden warming

by Dan Smale, Susan E. Strahan, Richard Querel, Udo Frieß, Gerald E. Nedoluha, Sylvia E. Nichol, John Robinson, Ian Boyd, Michael Kotkamp, R. Michael Gomez, Mark Murphy, Hue Tran, Jamie McGaw
Published 2021-01-01