@unpublished{TUW-196640, author = {Wagner, Wolfgang}, title = {Soil Moisture ECV (Essential Climate Variable)}, year = {2011}, note = {invited; talk: 13th Session of the COS/GTOS/WCRP Terrestial Observation Panel for Climate (TOPC), Geneva, Switzerland; 2011-03-10 -- 2011-03-11} }