title: Links between erosion, runoff variability and seismicity in the Taiwan orogen.
abstract: The erosion of mountain belts controls their topographic and structural evolution and is the main source of sediment delivered to the oceans. Mountain erosion rates have been estimated from current relief and precipitation, but a more complete evaluation of the controls on erosion rates requires detailed measurements across a range of timescales. Here we report erosion rates in the Taiwan mountains estimated from modern river sediment loads, Holocene river incision and thermochronometry on a million-year scale. Estimated erosion rates within the actively deforming mountains are high (3-6 mm yr(-1)) on all timescales, but the pattern of erosion has changed over time in response to the migration of localized tectonic deformation. Modern, decadal-scale erosion rates correlate with historical seismicity and storm-driven runoff variability. The highest erosion rates are found where rapid deformation, high storm frequency and weak substrates coincide, despite low topographic relief.
authors.affiliation: Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK. simon00@esc.cam.ac.uk
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Dadson
authors.forename: Niels
authors.initials: N
authors.lastname: Hovius
authors.forename: Hongey
authors.initials: H
authors.lastname: Chen
authors.forename: W Brian
authors.initials: WB
authors.lastname: Dade
authors.forename: Meng-Long
authors.initials: ML
authors.lastname: Hsieh
authors.forename: Sean D
authors.initials: SD
authors.lastname: Willett
authors.forename: Jyr-Ching
authors.initials: JC
authors.lastname: Hu
authors.forename: Ming-Jame
authors.initials: MJ
authors.lastname: Horng
authors.forename: Meng-Chiang
authors.initials: MC
authors.lastname: Chen
authors.forename: Colin P
authors.initials: CP
authors.lastname: Stark
authors.forename: Dimitri
authors.initials: D
authors.lastname: Lague
authors.forename: Jiun-Chuan
authors.initials: JC
authors.lastname: Lin