Bundesamt für Seeschifffahrt und Hydrographie
BSH has published weekly composite SST analyses since 1968.
Until November 1994 the mapping technique consisted in plotting ship and station
data onto a map for each week. The maps were hand contoured subjectively and grid
point values extracted on a 20nm equal area grid.
Since December 1994 objective statistical interpolation has been used to estimate
grid point SSTs on a 20km Lambert equal area grid. In data sparse regions the
analysis employs a blending algorithm for AVHRR SSTs.
The monthly mean maps presented here were computed from these weekly SST
BSH M5402, P. Loewe, 1. Feb. 1999