since 1898, Hæll since
1880, Stykkishólmur since 1830, Teigarhorn since 1873,
Vestmannaeyjar since 1877, Akureyri in 1846–1854 and af-
ter 1881 and Hólar in Hornafjörður in 1884–1890 and af-
ter 1921). An
iterative expectation-maximization (EM) algo-
rithm (Dempster et al., 1977) was used to construct a contin-
uous temperature record for Hólar in Hornafjörður extend-
ing back to 1860 using
/media/ces/Adalgeirsdottir-etal-tc-5-961-2011.pdf