Importance of Arctic Melt Ponds for Primary Productivity during summer 2011

摘要: During the Polarstern summer expedition TransArc 2011 to Central Arctic, biological and physical importance of melt ponds was assessed in terms primary productivity light transmittance. A seasonal succession could be observed: thick algal aggregates with high Net Primary Productivity (NPP) rates were found during late open ponds, while low NPP early autumn refrozen closed ponds. These different are not correlated nutrient concentrations. Thus, seems relevant factor for NPP. Indeed according Lee et.al. intensity at pond surface favours, rather than inhibits carbon uptake rates. Besides their potential sequestration, will also impact entire Arctic ecosystem as they allow more incoming reach water column therefore under ice might increase.