TY - JOUR TI - Ice core evidence for a second volcanic eruption around 1809 in the Northern Hemisphere U1 - Further reading JF - Geophysical Research Letters AU - Yalcin, Kaplan AU - Wake, Cameron P. AU - Kreutz, Karl J. AU - Germani, Mark S. AU - Whitlow, Sallie I. DO - 10.1029/2006GL026013 PY - 2006 SN - 0094-8276 IS - 14 VL - 33 ER -