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The tropical lapse rate steepened during the Last Glacial Maximum
Loomis, S.E.; Russell, J.M.; Verschuren, D.; Morrill, C.; De Cort, G.; Sinninghe Damsté, J.S.; Olago, D.; Eggermont, H.; Street-Perrott, F.A.; Kelly, M.A. (2017). The tropical lapse rate steepened during the Last Glacial Maximum. Science Advances 3(1): e1600815. dx.doi.org/10.1126/sciadv.1600815
In: Science Advances. AAAS: New York. ISSN 2375-2548, meer
Peer reviewed article  

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Auteurs  Top 
  • Loomis, S.E.
  • Russell, J.M.
  • Verschuren, D.
  • Morrill, C.
  • De Cort, G.
  • Sinninghe Damsté, J.S., meer
  • Olago, D.
  • Eggermont, H.
  • Street-Perrott, F.A.
  • Kelly, M.A.

Abstract
    The gradient of air temperature with elevation (the temperature lapse rate) in the tropics is predicted to become lesssteep during the coming century as surface temperature rises, enhancing the threat of warming in high-mountainenvironments. However, the sensitivity of the lapse rate to climate change is uncertain because of poor constraintson high-elevation temperature during past climate states. We present a 25,000-year temperature reconstruction fromMount Kenya, East Africa, which demonstrates that cooling during the Last Glacial Maximum was amplified with elevationand hence that the lapse rate was significantly steeper than today. Comparison of our data with paleoclimatesimulations indicates that state-of-the-art models underestimate this lapse-rate change. Consequently, future highelevationtropical warming may be even greater than predicted.

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