2000-year-long temperature reconstruction from the Indo-Pacific warm pool Climate
Recently I'm in an interesting study by Oppo et al. has struck, leaving the impression. It is the work 2,000-year-long temperature reconstruction and hydrology from the Indo-Pacific warm pool (pdf format, 620 KB) from the year 2009.
Wednesday, January 5, 2011
Whats Master Bate Is Good For ?
The reason for this but I no longer very current study indicates "by magic" is that this study the South Asian equatorial region (Indo-Pacific warm pool, Makassar Strait, Indonesia - 0 ° lat / long 116th ° E) is located. This justifies - if one takes into account the scarce data base of Langzeitproxies for the Equatorial room - in my view, the leadership at this time. The study authors themselves describe very well how I think the need for such a study, as follows: Northern Hemisphere surface temperature reconstructions suggest that the late twentieth century was warmer than any other time during the past 500 years and possibly any time during the past 1.300 years [refs 1,2]. These temperature reconstructions are based on Largely terrestrial records from extra-tropical or high-elevation sites, however, global average surface temperature changes closely follow those of the global tropics[3], which are 75% ocean. In particular, the tropical Indo-Pacific warm pool (IPWP) represents a major heat reservoir that both influences global atmospheric circulation [4] and responds to remote northern high-latitude forcings[5,6]. Oppo et al., 1113
Was wurde gemacht?
Oppo et al., 1113
Was waren die für uns wichtigen Ergebnisse?
The SST reconstruction shows cooler temperatures between about AD 400 and AD 950 than during much of the so-called Medieval Warm Period (about AD 900–1300), a warm period found in many northern high-latitude records but whose global significance is uncertain[1].
Regardless of G. ruber* seasonality in this region, the reconstruction suggests that at least during the Medieval Warm Period, and possibly the preceding 1,000 years, Indonesian SSTs were similar to modern SSTs.
Oppo et al., 1114
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[1] Jansen, E. et al. in Climate Change 2007: The Physical Science Basis (eds Solomon, S. et al.) 466–482 (Cambridge Univ. Press, 2007).
[2] Mann, M. E. et al. Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia. Proc. Natl Acad. Sci. USA 105, 13252–13257 (2008).
[3] National Research Council. Surface Temperature Reconstructions for the Last 2,000 Years (National Academy Press, 2006); available at http://www.nap.edu/catalog.php?record_id511676æ.
[4] Qu, T., Du, Y., Strachan, J., Meyers, G. & Slingo, J. Sea surface temperature and its variability in the Indonesian region. Oceanography 18, 50–61 (2005).
[5] Broccoli, A. J., Dahl, K. A. & Stouffer, R. J. Response of the ITCZ to northern hemisphere cooling. Geophys. Res. Lett. 33, doi:10.1029/2005GL024546 (2006).
[6] Chiang, J. C. H. & Bitz, C. M. Influence of high latitude ice cover on the marine Intertropical Convergence Zone. Clim. Dyn. 25, 477–496 (2005).
* Zur Erklärung: "To reconstruct d18O of sea water (SST and d18Osw), we generated Mg/Ca and d18O data on the planktonic foraminifera, Globigerinoides ruber (sensu stricto morphotype), which inhabits the surface mixed layer (Methods). "Oppo et al., 1114
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