Relationships between landscape morphology, climate and surface erosion in northern Peru at 5°S latitude

Mettier, Ralph; Schlunegger, Fritz; Schneider, Heinz; Rieke‐Zapp, Dirk; Schwab, Marco

doi:10.1007/s00531-008-0355-7

Cited by 22 publications

(31 citation statements)

References 27 publications

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“…2A) (Peru Ministerio de Agricultura; Mettier et al, 2009). We use the precipitation data reported in Mettier et al (2009) in preference to the 9-year averaged Mettier et al (2009). (E) Channel steepness (grey line) and precipitation rates (dashed lines) along the Rio Yapatera.…”

Section: Climatementioning

confidence: 99%

“…1300 mm y −1 on the Meseta where the channel headwaters are located, to zero in the Sechura desert and at the Pacific coast ( Fig. 2A) (Peru Ministerio de Agricultura; Mettier et al, 2009). We use the precipitation data reported in Mettier et al (2009) in preference to the 9-year averaged Mettier et al (2009).…”

Section: Climatementioning

confidence: 99%

“…1). Because of these climate contrasts, catchments in northern Peru, and particularly the Pirua drainage basin have been home to detailed geomorphic studies with the aim of detecting the landscape response to this dual climate (Schneider et al, 2008;Mettier et al, 2009). These studies converge on the general notion that landscape metrics and the limits on sediment discharge change with contrasts between the monsoonal and El Nino precipitation intensities.…”

Section: Introductionmentioning

confidence: 98%

“…2). These transverse catchments were selected because they cover the full ranges of hillslope and channel gradients and climate in the area as detailed by Schneider et al (2008) and Mettier et al (2009). Because lithologic and tectonic conditions are approximately spatially uniform within the investigated area, the observable variation of denudation rates can be attributed solely to the influence of climate variation.…”

Section: Introductionmentioning

confidence: 99%

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El Niño forcing on 10Be-based surface denudation rates in the northwestern Peruvian Andes?

et al. 2010

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Section: Climatementioning

confidence: 99%

Section: Climatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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El Niño forcing on 10Be-based surface denudation rates in the northwestern Peruvian Andes?

et al. 2010

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“…This aridity is sometimes interrupted by El Niño events that are, especially in northern Peru and central Chile, characterized by strong precipitation events and major flooding (e.g. Ortlieb and Vargas 2003;Mettier et al 2009). The influence of El Niño on the southern Peruvian coast is less clear (see discussion in Ortlieb and Vargas 2003).…”

Section: Climatic Settingmentioning

confidence: 99%

Late Pleistocene fans and terraces in the Majes valley, southern Peru, and their relation to climatic variations

Steffen

Schlunegger

Preusser

2009

Int J Earth Sci (Geol Rundsch)

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This study investigates the connection between sediment aggradation, erosion and climate in a desert environment of the Majes valley, southern Peru. Luminescence dating of terraces and fans shows that sediment aggradation correlates with wet time intervals on the Altiplano, suggesting a climatic influence on the aggradation-degradation cycles. Major periods of aggradation occurred between *110-100, *60-50 and 12-8 ka. More precipitation in the Majes catchment resulted in increased erosion and transportation of sediment from the hillslopes into the trunk river. As a result, the sediment loads exceeded the transport capacity of the Majes River and aggradation started in the lower reaches where the river gradient is less. Depletion of the hillslope sediment reservoirs caused a relative increase in the capacity of the trunk river to entrain and transport sediment, resulting in erosion of the previously deposited sediment. Consequently, although climate change may initiate a phase of sediment accumulation, degradation can be triggered by an autocyclic negative feedback and does not have to be driven by climatic change.

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Landscape response to Pleistocene-Holocene precipitation change in the Western Cordillera, Peru:¹⁰Be concentrations in modern sediments and terrace fills

McPhillips

Bierman

Crocker

et al. 2013

J. Geophys. Res. Earth Surf.

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The landscape response to climate change is frequently investigated with models because natural experiments on geologic timescales are rare. In Quebrada Veladera, in the western Andes Mountains, the formation of alluvial terraces during periods of high precipitation presents opportunities for such an experiment. We compare drainage‐average erosion rates during Pleistocene terrace deposition with Holocene rates, using cosmogenic 10Be samples for seven pairs of quartz sand taken from the trunk and tributaries of Quebrada Veladera and adjacent terraces. Each pair consists of sediment collected from the modern channel and excavated from an adjacent fill terrace. The terrace fill was deposited at ~16 ka and preserved an isotopic record of paleoerosion rates in the Late Pleistocene. Modern sands yield 10Be concentrations between 1.68 × 105 and 2.28 × 105 atoms/g, corresponding to Holocene erosion rates between 43 ± 3 and 58 ± 4 mm/kyr. The 10Be concentrations in terrace sands range from 9.46 × 104 to 3.73 × 105 atoms/g, corresponding to paleoerosion rates from 27 ± 2 to 103 ± 8 mm/kyr. Smaller, upstream tributaries show a substantial decline in erosion rate following the transition from a wet to dry climate, but larger drainage areas show no change. We interpret this trend to indicate that the wetter climate drove landscape dissection, which ceased with the return to dry conditions. As channel heads propagated upslope, erosion accelerated in low‐order drainages before higher‐order ones. This contrast disappeared when the drainage network ceased to expand; at that point, erosion rates became spatially uniform, consistent with the uniformity of modern hillslope gradients.

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Relationships between landscape morphology, climate and surface erosion in northern Peru at 5°S latitude

Cited by 22 publications

References 27 publications

El Niño forcing on 10Be-based surface denudation rates in the northwestern Peruvian Andes?

El Niño forcing on 10Be-based surface denudation rates in the northwestern Peruvian Andes?

Late Pleistocene fans and terraces in the Majes valley, southern Peru, and their relation to climatic variations

Landscape response to Pleistocene-Holocene precipitation change in the Western Cordillera, Peru:¹⁰Be concentrations in modern sediments and terrace fills

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Relationships between landscape morphology, climate and surface erosion in northern Peru at 5°S latitude

Cited by 22 publications

References 27 publications

El Niño forcing on 10Be-based surface denudation rates in the northwestern Peruvian Andes?

El Niño forcing on 10Be-based surface denudation rates in the northwestern Peruvian Andes?

Late Pleistocene fans and terraces in the Majes valley, southern Peru, and their relation to climatic variations

Landscape response to Pleistocene-Holocene precipitation change in the Western Cordillera, Peru:10Be concentrations in modern sediments and terrace fills

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Product

Resources

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Landscape response to Pleistocene-Holocene precipitation change in the Western Cordillera, Peru:¹⁰Be concentrations in modern sediments and terrace fills