Room 307, British Antarctic Survey 2008-12-03 11:00: Nitrogen and oxygen isotopic constraints on the budget of NOx and nitrate in polar regions (Dr Samuel Morin of Laboratoire de Glaciologie et Geohysique de l'Environnement, Grenoble, France) 2009-07-01 11:00: Marine ice in Larsen Ice Shelf (Paul Holland)