a1 The Plymouth Laboratory
Monthly sea temperatures are tabulated for Station E1 from 1960 and for Plymouth Sound from 1958. The 70-year series now available shows that annual means increased by 0·75°C up to the 1950s. Since 1960 inshore temperatures have fallen 0·5°C and E1 surface temperatures 0·4°C. Sea-bottom temperatures at E1 increased 0·4°C between 1920 and the 1950s, and have fallen 0·4°C since 1960. The changes have been most marked in the second half of the year, but the last quarter (October-December) is still somewhat warmer than in 1920 and earlier.