Journal cover Journal topic
Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union

Journal metrics

  • IF value: 2.649 IF 2.649
  • IF 5-year<br/> value: 2.688 IF 5-year
    2.688
  • CiteScore<br/> value: 2.64 CiteScore
    2.64
  • SNIP value: 0.628 SNIP 0.628
  • SJR value: indexed SJR
    indexed
  • IPP value: 1.689 IPP 1.689
  • h5-index value: 6 h5-index 6
https://doi.org/10.5194/esurf-2017-35
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Short communication
20 Jun 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth Surface Dynamics (ESurf).
SHORT COMMUNICATION: Massive Erosion in Monsoonal Central India Linked to Late Holocene Landcover Degradation
Liviu Giosan1, Camilo Ponton1,2,a, Muhammed Usman3, Jerzy Blusztajn1, Dorian Fuller4, Valier Galy5, Negar Haghipour3, Joel E. Johnson6, Cameron McIntyre3,7,b, Lucas Wacker7, and Timothy Eglinton3,5 1Geology & Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
2MIT/WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Cambridge, Massachusetts, USA
3Geological Institute, ETH Zürich, 8092 Zürich, Switzerland
4Institute of Archaeology, University College London, London, UK
5Marine Chemistry & Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
6Earth Sciences, University of New Hampshire, Durham, New Hampshire, USA
7Laboratory of Ion Beam Physics, ETH Zürich, 8093 Zürich, Switzerland
anow at: Division of Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA
bnow at: Scottish Universities Environmental Research Center, E. Kilbride, G75 0QF, UK
Abstract. Soil erosion plays a crucial role in transferring sediment and carbon from land to sea, yet little is known about the rhythm and rates of soil erosion prior to the most recent few centuries. Here we reconstruct a Holocene erosional history from central India, as integrated by the Godavari River in a sediment core from the Bay of Bengal. We quantify terrigenous fluxes, fingerprint sources for the lithogenic fraction and assess the age of the exported terrigenous carbon. Taken together, our data show that the monsoon decline in the late Holocene, later exacerbated by the Neolithic adoption and Iron Age extensification of agriculture on the Deccan Plateau, significantly increased soil erosion and the age of exported organic carbon. Despite a constantly elevated sea level since the middle Holocene, this erosion acceleration led to rapid continental margin growth. We conclude that in monsoon conditions, aridity boosts rather than supresses sediment and carbon export acting as a veritable monsoon erosional pump modulated by landcover conditions.

Citation: Giosan, L., Ponton, C., Usman, M., Blusztajn, J., Fuller, D., Galy, V., Haghipour, N., Johnson, J. E., McIntyre, C., Wacker, L., and Eglinton, T.: SHORT COMMUNICATION: Massive Erosion in Monsoonal Central India Linked to Late Holocene Landcover Degradation, Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2017-35, in review, 2017.
Liviu Giosan et al.
Liviu Giosan et al.
Liviu Giosan et al.

Viewed

Total article views: 455 (including HTML, PDF, and XML)

HTML PDF XML Total Supplement BibTeX EndNote
364 80 11 455 21 5 5

Views and downloads (calculated since 20 Jun 2017)

Cumulative views and downloads (calculated since 20 Jun 2017)

Viewed (geographical distribution)

Total article views: 455 (including HTML, PDF, and XML)

Thereof 451 with geography defined and 4 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 25 Sep 2017
Publications Copernicus
Download
Short summary
A reconstruction of erosion in the Core Monsoon Zone of India provides unintuitive but fundamental insights: in contrast to semiarid regions that experience enhanced erosion during erratic rain events, the monsoon is annual and acts as a veritable erosional pump accelerating when the landcover is minimal. The existence of such a monsoon erosional pump promises to reconcile conflicting views on the land-sea sediment and carbon transfer as well as the monsoon evolution at longer timescales.
A reconstruction of erosion in the Core Monsoon Zone of India provides unintuitive but...
Share