C. H. Grohmann1, M. J. Smith2, C. Riccomini3 1 Institute of
Geosciences – University of São Paulo – Rua do Lago, 562, São
Paulo, SP, Brazil, 05508-080 Telephone: +55 11 3091- 4216 Fax:
+55 11 3091-4258 Email: firstname.lastname@example.org,
email@example.com 2 School of Geography, Geology and the
Environment, Kingston University, Kingston-upon-Thames, Surrey,
KT1 2EE, UK Telephone: +44 (0) 207 099 2817 Fax: +44 (0) 870 063
3061 3 Institute of Geosciences – University of São Paulo – Rua
do Lago, 562, São Paulo, SP, Brazil, 05508-080 Telephone: +55 11
3091- 4126 Fax: +55 11 3091-4207 Surface roughness is a key
variable used across the earth and planetary sciences (Hobson
1972) to both identify individual landforms and determine the
processes acting upon them. In geomorphometry, roughness is
described using surface elevation values and can be used to
characterise landforms over a variety of different scales.
Throughout this article, we use the term surface roughness as an
expression of the variability of elevati