# name
Lightning stroke clustering into cloud-to-ground lightning flashes

# metadata.dc.description[].value
Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2014, Tutor: Joan Bech

# metadata.dc.description.abstract[].value
Cloud-to-ground stroke data have been analysed for the years 2010-2012 for the Cata-
lan region. These strokes have been grouped together into lightning 
ashes using a hierarchical
clustering method, with two di erent approaches to the clustering radius, as the objective of the
study was to evaluate di erent clustering methods. The results for the two approaches were com-
pared with the results from a step-by-step method, giving us di erences of 2% and 7% in the  nal
number of lightning 
ashes. Using di erent values for the lightning 
ash window and lightning spa-
tial radius the multiplicity values from the clustering methods results ranged from 1.6 to 2.0. These
results can improve the reliability of studies where the number of lightning 
ashes is important such as in severe weather case studies or in climatological rainfall to lightning ratio analysis.

# metadata.dc.title[].value
Lightning stroke clustering into cloud-to-ground lightning flashes