Contents

22 March 2013
Vol 339, Issue 6126

About The Cover

Cover image expansion

COVER Accumulation of algal biomass under thinning Arctic sea ice (image diameter ~25 meters). This photograph was taken on 17 September 2012 in the central Arctic basin at 85°30'47"N, 59°54'11"E, from the bridge of the research vessel Polarstern. Here, the central ice floe is surrounded by a green cloud of sub-ice diatoms. Current trends in sea-ice thinning may influence algal growth in this region. See page 1430. Photo: Stefan Hendricks, Alfred Wegener Institute, Expedition IceArc (ARK27-3)