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10Be in Late Deglacial Climate Simulated by Echam5-ham – Part 2: Isolating the Solar Signal from 10Be Deposition : Volume 10, Issue 2 (01/04/2014)

By Heikkilä, U.

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Book Id: WPLBN0003990911
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: 10Be in Late Deglacial Climate Simulated by Echam5-ham – Part 2: Isolating the Solar Signal from 10Be Deposition : Volume 10, Issue 2 (01/04/2014)  
Author: Heikkilä, U.
Volume: Vol. 10, Issue 2
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

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Shi, X., Smith, A. M., Phipps, S. J., & Heikkilä, U. (2014). 10Be in Late Deglacial Climate Simulated by Echam5-ham – Part 2: Isolating the Solar Signal from 10Be Deposition : Volume 10, Issue 2 (01/04/2014). Retrieved from http://worldebooklibrary.org/


Description
Description: Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW, Australia. This study investigates the effect of deglacial climate on the deposition of the solar proxy 10Be globally, and at two specific locations, the GRIP site at Summit, Central Greenland, and the Law Dome site in coastal Antarctica. The deglacial climate is represented by three 30 year time slice simulations of 10 000 BP (years before present = 1950 CE), 11 000 and 12 000 BP, compared with a preindustrial control simulation. The model used is the ECHAM5-HAM atmospheric aerosol–climate model, driven with sea-surface temperatures and sea ice cover simulated using the CSIRO Mk3L coupled climate system model. The focus is on isolating the 10Be production signal, driven by solar variability, from the weather- or climate-driven noise in the 10Be deposition flux during different stages of climate. The production signal varies at lower frequencies, dominated by the 11 year solar cycle within the 30 year timescale of these experiments. The climatic noise is of higher frequencies than 11 years during the 30 year period studied. We first apply empirical orthogonal function (EOF) analysis to global 10Be deposition on the annual scale and find that the first principal component, consisting of the spatial pattern of mean 10Be deposition and the temporally varying solar signal, explains 64% of the variability. The following principal components are closely related to those of precipitation. Then, we apply ensemble empirical decomposition (EEMD) analysis to the time series of 10Be deposition at GRIP and at Law Dome, which is an effective method for adaptively decomposing the time series into different frequency components. The low-frequency components and the long-term trend represent production and have reduced noise compared to the entire frequency spectrum of the deposition. The high-frequency components represent climate-driven noise related to the seasonal cycle of e.g. precipitation and are closely connected to high frequencies of precipitation. These results firstly show that the 10Be atmospheric production signal is preserved in the deposition flux to surface even during climates very different from today's both in global data and at two specific locations. Secondly, noise can be effectively reduced from 10Be deposition data by simply applying the EOF analysis in the case of a reasonably large number of available data sets, or by decomposing the individual data sets to filter out high-frequency fluctuations.

Summary
10Be in late deglacial climate simulated by ECHAM5-HAM – Part 2: Isolating the solar signal from 10Be deposition

Excerpt
Beer, J., Blinov, A., Bonani, G., Finkel, R. C., Hofmann, H. J., Lehmann, B., Oeschger, H., Sigg, A., Schwander, J., Staffelbach, T., Stauffer, B., Suter, M., and Wölfli, W.: Use of 10Be in polar ice to trace the 11-year cycle of solar activity, Nature, 347, 164–166, 1990.; Finkel, R. C. and Nishiizumi, K.: Beryllium 10 concentrations in the Greenland Ice Sheet Project 2 ice core from 3–40 ka, J. Geophys. Res., 102, 26699–26706, 1997.; Beer, J., Baumgartner, S., Dittrich-Hannen, B., Hauenstein, J., Kubik, P., Lukasczyk, C., Mende, W., Stellmacher, R., and Suter, M.: Solar Variability Traced by Cosmogenic Isotopes in The Sun as a Variable Star: Solar and Stellar Irradiance Variations, edited by: Pap, J. M., Fröhlich, C., Hudson, H. S., and Solanki, S. K., Cambridge University Press, 291–300, 1994.; Beer, J., Muscheler, R., Wagner, G., Laj, C., Kissel, C., Kubik, P. W., and Synal, H.-A.: Cosmogenic nuclides during isotope stages 2 and 3, Quaternary Sci. Rev., 21, 1129–1139, 2002.; Franzke, C.: Nonlinear trends, long-range dependence and climate noise properties of surface temperature, J. Climate, 25, 4172–4183, doi:10.1175/JCLI-D-11-00293.1, 2012.; Heikkilä, U. and Smith, A. M.: Production rate and climate influences on the variability of 10Be deposition simulated by ECHAM5-HAM: Globally, in Greenland and in Antarctica, J. Geophys. Res., 118, 1–15, doi:10.1002/jgrd.50217, 2013.; Heikkilä, U., Phipps, S. J., and Smith, A. M.: 10Be in late deglacial climate simulated by ECHAM5-HAM – Part 1: Climatological influences on 10Be deposition, Clim. Past, 9, 2641–2649, doi:10.5194/cp-9-2641-2013, 2013.; Huang, N. E. and Wu, Z.: A review on Hilbert-Huang Transform: Method and its applications to geophysical studies, Rev. Geophys. 46, RG2006, doi:10.1029/2007RG000228, 2008.; Huang, N. E., Huang, N. E., Shen, Z., and Long, S. R.: The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis, P. Roy. Soc. Lond. A, 454, 903–995, 1998.; Lorenz, E. N.: Empirical orthogonal functions and statistical weather prediction, Science Report 1, Statistical forecasting project, (NTIS AD 110268), Department of meteorology, MIT, 49 pp., 1956; McCracken, K., Beer, J., Steinhilber, F., and Abreu, J.: The Heliosphere in time, Space Sci. Rev., 176, 59–71, doi:10.1007/s11214-011-9851-3, 2012.; Muscheler, R., Beer, J., Wagner, G., Laj, C., Kissel, C., Raisbeck, G. M., Yiou, F.,and Kubik, P. W.: Changes in the carbon cycle during the last deglaciation as indicated by the comparison of 10Be and 14C records, Earth Planet. Sc. Lett., 6973, 1–16, doi:10.1016/S0012-821X(03)00722-2, 2004.; Muscheler, R., Beer, J., Kubik, P. W. and Synal, H.-A.: Geomagnetic field intensity during the last 60,000 years based on 10Be & 36Cl from the Summit ice cores and 14C, Quarternary Sci. Rev., 24, 1849–1860, doi:10.1016/j.quascirev.2005.01.012, 2005.; Pedro, J. B., Smith, A. M., Simon, K. J., van Ommen, T. D., and Curran, M. A. J.: High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends, Clim. Past, 7, 707–721, doi:10.5194/cp-7-707-2011, 2011.; Phipps, S. J., Rotstayn, L. D., Gordon, H. B., Roberts, J. L., H

 

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