World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Holocene Evolution of Summer Winds and Marine Productivity in the Tropical Indian Ocean in Response to Insolation Forcing: Data-model Comparison : Volume 7, Issue 1 (03/02/2011)

By Bassinot, F. C.

Click here to view

Book Id: WPLBN0003980300
Format Type: PDF Article :
File Size: Pages 36
Reproduction Date: 2015

Title: Holocene Evolution of Summer Winds and Marine Productivity in the Tropical Indian Ocean in Response to Insolation Forcing: Data-model Comparison : Volume 7, Issue 1 (03/02/2011)  
Author: Bassinot, F. C.
Volume: Vol. 7, Issue 1
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Marti, O., Braconnot, P., Lombard, F., Mathien-Blard, E., Bopp, L., Bassinot, F. C., & Marzin, C. (2011). Holocene Evolution of Summer Winds and Marine Productivity in the Tropical Indian Ocean in Response to Insolation Forcing: Data-model Comparison : Volume 7, Issue 1 (03/02/2011). Retrieved from http://worldlibrary.net/


Description
Description: LSCE/IPSL (laboratoire CEA/CNRS/UVSQ), Domaine du CNRS, UMR 8212, bâtiment 12, 91198 Gif-sur-Yvette, France. The relative abundance of Globigerinoides bulloides was used to infer Holocene paleo-productivity changes at ODP Site 723 (19°03' N, 57°37' E; Oman Margin) and core MD77-191 (07°30' N, 76°43' E; Southern tip of India). Today, the primary productivity at both sites peaks during the summer season, when monsoon winds result in local Eckman pumping, which brings more nutrients to the surface. On a millennium time-scale, however, the % G.~bulloides records indicate an opposite evolution of paleo-productivity at these sites through the Holocene. The Oman Margin productivity was maximal at ~9 ka (boreal summer insolation maximum) and decreased since then, suggesting a direct response to insolation forcing. On the opposite, the productivity at the southern tip of India was minimum at ~9 ka, and strengthened towards the present.

Paleo-reconstructions of wind patterns, marine productivity and foraminifera assemblages were obtained using the IPSL-CM4 climate model coupled to the PISCES marine biogeochemical model and the FORAMCLIM ecophysiological model. These reconstructions are fully coherent with the marine core data. They confirm that the evolution of particulate export production and foraminifera assemblages at our two sites have been directly linked with the strength of the upwelling. Model simulations at 9 ka and 6 ka BP show that the relative evolution between the two sites since the early Holocene can be explained by the weakening but also the southward shift of monsoon winds over the Arabian sea during boreal summer.


Summary
Holocene evolution of summer winds and marine productivity in the tropical Indian Ocean in response to insolation forcing: data-model comparison

Excerpt
An, Z., Porter, S. C., Kutzbach, J. E., Wu, X., Wang, S., Liu, X., Li, X., and Zhou, W.: Asynchronous Holocene optimum of the East Asian monsoon, Quaternary Sci. Rev., 19(8), 743–762, 2000.; Anderson, D. and Prell, W.: A 300 kyr record of upwelling off oman during the late quaternary: Evidence of the Asian Southwest monsoon, Paleoceanography, 8(2), 193–208, 1993.; Anderson, D. M., Baulcomb, C. K., Duvivier, A. K., and Gupta, A. K.: Indian summer monsoon during the last two millennia, J. Quaternary Sci., ISSN 0267-8179, doi:10.1002/jqs.1369, 2010.; Ashok, K., Guan, Z., Saji, N. H., and Yamagata, T.: Individual and Combined Influences of ENSO and the Indian Ocean Dipole on the Indian Summer Monsoon, J. Climate, 17, 3141–3155, 2004.; Aumont, O. and Bopp, L.: Globalizing results from ocean in situ iron fertilization studies, Global Biogeochem. Cy., 20, GB2017, doi:10.1029/2005GB002591, 2006.; Bard, E.: Paleoceanographic implications of the difference in deep-sea sediment mixing between large and fine particles, Paleoceanography, 16(3), 235–239, 2001.; Braconnot, P., Otto-Bliesner, B., Harrison, S., Joussaume, S., Peterchmitt, J.-Y., Abe-Ouchi, A., Crucifix, M., Driesschaert, E., Fichefet, Th., Hewitt, C. D., Kageyama, M., Kitoh, A., La\^{i}né, A., Loutre, M.-F., Marti, O., Merkel, U., Ramstein, G., Valdes, P., Weber, S. L., Yu, Y., and Zhao, Y.: Results of PMIP2 coupled simulations of the Mid-Holocene and Last Glacial Maximum �- Part 1: experiments and large-scale features, Clim. Past, 3, 261–277, doi:10.5194/cp-3-261-2007, 2007a.; Braconnot, P., Otto-Bliesner, B., Harrison, S., Joussaume, S., Peterchmitt, J.-Y., Abe-Ouchi, A., Crucifix, M., Driesschaert, E., Fichefet, Th., Hewitt, C. D., Kageyama, M., Kitoh, A., Loutre, M.-F., Marti, O., Merkel, U., Ramstein, G., Valdes, P., Weber, L., Yu, Y., and Zhao, Y.: Results of PMIP2 coupled simulations of the Mid-Holocene and Last Glacial Maximum �- Part 2: feedbacks with emphasis on the location of the ITCZ and mid- and high latitudes heat budget, Clim. Past, 3, 279–296, doi:10.5194/cp-3-279-2007, 2007b.; Braconnot, P., Marzin, C., Grégoire, L., Mosquet, E., and Marti, O.: Monsoon response to changes in Earth's orbital parameters: comparisons between simulations of the Eemian and of the Holocene, Clim. Past, 4, 281–294, doi:10.5194/cp-4-281-2008, 2008.; Berger, A. L.: Long-term variations of daily insolation and Quaternary climatic changes, J. Atmos. Sci., 35(12), 2362–2367, 1978.; Camberlin, P.: Rainfall Anomalies in the Source Region of the Nile and Their Connection with the Indian Summer Monsoon, J. Climate, 10, 1380–1392, 1997.; Clemens, S., Prell, W., Murray, D., Shimmield, G., and Weedon, G.: Forcing mechanisms of the Indian Ocean monsoon, Nature, 353(6346), 720–725, 1991.; Clemens, S. C. and Prell, W. L.: A 350,000 year summer-monsoon multi-proxy stack from the Owen Ridge, Northern Arabian Sea, Mar. Geol, 201, 35–51, 2003.; COHMAP members: Climatic changes of the last 18,000 years: Observations and model simulations, Science, 241, 365–379, 1988.; Conan, S. and Brummer, G.: Fluxes of planktic foraminifera in response to monsoonal upwelling on the Somalia Basin margin, Deep-Sea Res. Pt. II, 47(9–11), 2207–2227, 2000..; Cullen, J. and Prell, W.: Planktonic foraminifera of the northern Indian Ocean: distribution and preservation in surface sediments, Mar. Micropaleontol., 9, 1–52, 1984.; Curry, W., Ostermann, D., Guptha, M., and Ittekkot, V.: Foraminiferal production and monsoonal upwelling in the Arabian Sea: evidence from sediment traps, Geol. Soc. Lond. Spec. Publ., 64(1), 93, 1992.; Dufresne, J., Quaas, J., Boucher, O., Denvil, S., and Fairhead, L.: Contrasts in the effects on climate of anthropogenic sulfate aerosols between the 20th and the 21st century, Geophys. Res. Lett., 32, L21703, doi:10.1029/2005GL023619, 2005.; Duplessy, J. C., Arnold, M., Maurice, P., Bard, E., Duprat, J., and Moyes, J.: Direct dat

 

Click To View

Additional Books


  • Sediment Sequence and Site Formation Pro... (by )
  • Climate Variability of the Mid- and High... (by )
  • Climate and Vegetation Changes During th... (by )
  • Summer Temperature Trend Over the Past T... (by )
  • Cryogenic Cave Carbonate – a New Tool fo... (by )
  • Down the Rabbit Hole: Toward Appropriate... (by )
  • Trace Metal Evidence for a Poorly Ventil... (by )
  • Influence of Orbital Forcing and Solar A... (by )
  • A Shift in the Spatial Pattern of Iberia... (by )
  • Corrigendum to the Importance of Norther... (by )
  • Northern Hemisphere Temperature Patterns... (by )
  • Towards a Quasi-complete Reconstruction ... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.