TY - GEN AU - Mike Cullen BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 07/1999 DO - 10.21957/en27xnnn8 LA - eng M1 - 285 PB - ECMWF PP - Shinfield Park, Reading PY - 1999 EP - 21 T2 - ECMWF Technical Memoranda TI - On the accuracy of the semi-geostrophic approximation UR - https://www.ecmwf.int/node/8829 ER -