Bull Volcanol (2004) 66:457–473 DOI 10.1007/s00445-003-0329-3

• Main Authors: C. Lacasse, G. Larsen, H. Soosalu
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Iceland
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.4877; http://www.geo.mtu.edu/~raman/papers/LacasseBV.pdf

2000 was the first volcanic cloud to be continuously and completely monitored advecting above Iceland, using the C-band weather radar near the Keflavk international airport. Real-time radar observations of the onset, advec-tion, and waning of the eruption cloud were studied using time series of PPI (plan-position indicator) radar images, including VMI normal, Echotop, and Cappi level 2 displays. The reflectivity of the entire volcanic cloud ranges from 0 to>60 dBz. The eruption column above the vent is essentially characterised by VMI normal and Cappi level 2 values,>30 dBz, due to the dominant influence of lapilli and ash (tephra) on the overall reflected signal. The cloud generated by the column was advected downwind to the north-northeast. It is charac-terised by values between 0 and 30 dBz, and the