TY - CPAPER AU - Adrian Simmons BT - ECMWF/Geo Workshop on Atmospheric Reanalyis, 19-22 June 2006 CY - Shinfield Park, Reading DA - 2006 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2006 SP - 93 EP - 104 T2 - ECMWF/Geo Workshop on Atmospheric Reanalyis, 19-22 June 2006 TI - Capturing trends and low-frequency variations in reanalyses ER -