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Paleoclimate Perspectives of Arctic Change. Spatial Synthesis Methods Extended Timescales: 2000+ Years New Temperature/Precipitation Proxies. SEARCH SSC Meeting Oct 28, 2008. Paleo Perspectives of Arctic Change. Paleo Perspectives of Arctic Change.
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Paleoclimate Perspectives of Arctic Change Spatial Synthesis Methods Extended Timescales: 2000+ Years New Temperature/Precipitation Proxies SEARCH SSC Meeting Oct 28, 2008
Paleo Perspectives of Arctic Change • Instrumental Record Too Short for Evaluating Recent Trends in Context of Natural Background Variability • Paleoclimate Records Key • High Resolution (annual-decadal) • Centennial-Millennial (≤ 2000 years)
Paleo Perspectives of Arctic Change Temperature anomaly 1600 1700 1800 1900 2000 Year AD Overpeck et al.,Science, 1997
Paleo Perspectives of Arctic Change Temperature anomaly 1600 1700 1800 1900 2000 Year AD Overpeck et al.,Science, 1997
Paleo Perspectives of Arctic Change Long records ≥1200 years
Paleo Perspectives of Arctic Change Varves and other sedimentary features Chironomids Pollen Diatoms, biogenic silica and organic matter content
Paleo Perspectives of Arctic Change New Proxies: D for temperature and Precipitation
Paleo Perspectives of Arctic Change New Proxies: GDGTs for Temperature and Precipitation TEX86 - lake surface temperature BIT - terrestrial runoff MBT - soil temperature