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Twelve Thousand Years of Dust: the Holocene Global Dust Cycle Constrained by Natural Archives : Volume 10, Issue 6 (13/11/2014)

By Albani, S.

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Book Id: WPLBN0004006747
Format Type: PDF Article :
File Size: Pages 87
Reproduction Date: 2015

Title: Twelve Thousand Years of Dust: the Holocene Global Dust Cycle Constrained by Natural Archives : Volume 10, Issue 6 (13/11/2014)  
Author: Albani, S.
Volume: Vol. 10, Issue 6
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Winckler, G., Maggi, V., Delmonte, B., Otto-Bliesner, B. L., Mayewski, P. A., Kohfeld, K. E.,...Lu, H. (2014). Twelve Thousand Years of Dust: the Holocene Global Dust Cycle Constrained by Natural Archives : Volume 10, Issue 6 (13/11/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Earth and Atmospheric Science, Cornell University, Ithaca, NY, USA. Mineral dust plays an important role in the climate system by interacting with radiation, clouds, and biogeochemical cycles. In addition, natural archives show that the dust cycle experienced variability in the past in response to global and local climate change. The compilation of the DIRTMAP paleodust datasets in the last two decades provided a target for paleoclimate models that include the dust cycle, following a time slice approach. We propose an innovative framework to organize a paleodust dataset that moves on from the positive experience of DIRTMAP and takes into account new scientific challenges, by providing a concise and accessible dataset of temporally resolved records of dust mass accumulation rates and particle grain-size distributions. We consider data from ice cores, marine sediments, loess/paleosol sequences, lake sediments, and peat bogs for this compilation, with a temporal focus on the Holocene period. This global compilation allows investigation of the potential, uncertainties and confidence level of dust mass accumulation rates reconstructions, and highlights the importance of dust particle size information for accurate and quantitative reconstructions of the dust cycle. After applying criteria that help to establish that the data considered represent changes in dust deposition, 43 paleodust records have been identified, with the highest density of dust deposition data occurring in the North Atlantic region. Although the temporal evolution of dust in the North Atlantic appears consistent across several cores and suggest that minimum dust fluxes are likely observed during the Early to mid-Holocene period (6000–8000 years ago), the magnitude of dust fluxes in these observations is not fully consistent, suggesting that more work needs to be done to synthesize datasets for the Holocene. Based on the data compilation, we used the Community Earth System Model to estimate the mass balance and variability of the global dust cycle during the Holocene, with dust load ranging from 17.1 to 20.5 Tg between 2000 and 10 000 years ago, and a minimum in the Early to Mid-Holocene (6000–8000 years ago).

Summary
Twelve thousand years of dust: the Holocene global dust cycle constrained by natural archives

Excerpt
Adkins, J., deMenocal, P., and Eshel, G.: The African humid period and the record of marine upwelling from excess 230Th in Ocean Drilling Program Hole 658C, Paleoceanography, 21, PA4203, doi:10.1029/2005PA001200, 2006.; Albani, S., Delmonte, B., Maggi, V., Baroni, C., Petit, J.-R., Stenni, B., Mazzola, C., and Frezzotti, M.: Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales, Clim. Past, 8, 741–750, doi:10.5194/cp-8-741-2012, 2012a.; Albani, S., Mahowald, N. M., Delmonte, B., Maggi, V., and Winckler, G.: Comparing modeled and observed changes in mineral dust transport and deposition to Antarctica between the Last Glacial Maximum and current climates, Clim. Dynam., 38, 1731–1755, doi:10.1007/s00382-011-1139-5, 2012b.; Albani, S., Mahowald, N. M., Perry, A. T., Scanza, R. A., Zender, C. S., Heavens, N. G., Maggi, V., Kok, J. F., and Otto-Bliesner, B. L.: Improved dust representation in the Community Atmosphere Model, J. Adv. Model. Earth Syst., 6, 541–570, doi:10.1002/2013MS000279, 2014.; Alley, R. B.: The Younger Dryas cold interval as viewed from central Greenland, Quaternary Sci. Rev., 19, 213–226, doi:10.1016/S0277-3791(99)00062-1, 2000.; An, Z., Kukla, G., Porter, S. C., and Xiao, J.: Late quaternary dust flow on the chinese Loess Plateau, Catena, 18, 125–132, doi:10.1016/0341-8162(91)90012-M, 1991.; Anderson, R. F., Fleisher, M. Q., and Lao, Y.: Glacial–interglacial variability in the delivery of dust to the central equatorial Pacific Ocean, Earth Planet. Sc. Lett., 242, 406–414, doi:10.1016/j.epsl.2005.11.061, 2006.; Anderson, R. F., Fleisher, M. Q., Lao, Y., and Winckler, G.: Modern CaCO3 preservation in equatorial Pacific sediments in the context of late-Pleistocene glacial cycles, Mar. Chem., 111, 30–46, doi:10.1016/j.marchem.2007.11.011, 2008.; Anderson, R. F., Barker, S., Fleisher, M., Gersonde, R., Goldstein, S. L., Kuhn, G., Mortyn, P. G., Pahnke, K., and Sachs, J. P.: Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean., Philos. T. R. Soc A., 372, 20130054, doi:10.1098/rsta.2013.0054, 2014.; Bacon, M. P.: Glacial to interglacial changes in carbonate and clay sedimentation in the Atlantic Ocean estimated from 230Th measurements, Isot.Geosci., 2, 97–111, 1984.; Bacon, M. P. and Anderson, R. F.: Distribution of thorium isotopes between dissolved and particulate forms in the deep sea, J. Geophys. Res., 87, 2045, doi:10.1029/JC087iC03p02045, 1982.; Bard, E., Arnold, M., Duprat, J., Moyes, J., and Duplessy, J.-C.: Reconstruction of the last deglaciation: deconvolved records of δ18O profiles, micropaleontological variations and accelerator mass spectrometric 14C dating, Clim. Dynam., 1, 101–112, doi:10.1007/BF01054479, 1987.; Bauer, E. and Ganopolski, A.: Sensitivity simulations with direct shortwave radiative forcing by aeolian dust during glacial cycles, Clim. Past, 10, 1333–1348, doi:10.5194/cp-10-1333-2014, 2014.; Begét, J.: Middle Wisconsinan climat


 

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