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The tropical lapse rate steepened during the Last Glacial Maximum

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Abstract
The gradient of air temperature with elevation (the temperature lapse rate) in the tropics is predicted to become less steep during the coming century as surface temperature rises, enhancing the threat of warming in high-mountain environments. However, the sensitivity of the lapse rate to climate change is uncertain because of poor constraints on high-elevation temperature during past climate states. We present a 25,000-year temperature reconstruction from Mount Kenya, East Africa, which demonstrates that cooling during the Last Glacial Maximum was amplified with elevation and hence that the lapse rate was significantly steeper than today. Comparison of our data with paleoclimate simulations indicates that state-of-the-art models underestimate this lapse-rate change. Consequently, future high-elevation tropical warming may be even greater than predicted.
Keywords
SEA-SURFACE TEMPERATURE, EQUATORIAL EAST-AFRICA, CLIMATE MODEL, ICE-SHEET, LAKE, CALIBRATION, PROXY, RECONSTRUCTIONS, GEOCHEMISTRY, DEGLACIATION

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Chicago
Loomis, Shannon E, James M Russell, Dirk Verschuren, Carrie Morrill, Gijs De Cort, Jaap S Sinninghe Damsté, Daniel Olago, Hilde Eggermont, F Alayne Street-Perrott, and Meredith A Kelly. 2017. “The Tropical Lapse Rate Steepened During the Last Glacial Maximum.” Science Advances 3 (1).
APA
Loomis, S. E., Russell, J. M., Verschuren, D., Morrill, C., De Cort, G., Sinninghe Damsté, J. S., Olago, D., et al. (2017). The tropical lapse rate steepened during the Last Glacial Maximum. SCIENCE ADVANCES, 3(1).
Vancouver
1.
Loomis SE, Russell JM, Verschuren D, Morrill C, De Cort G, Sinninghe Damsté JS, et al. The tropical lapse rate steepened during the Last Glacial Maximum. SCIENCE ADVANCES. 2017;3(1).
MLA
Loomis, Shannon E, James M Russell, Dirk Verschuren, et al. “The Tropical Lapse Rate Steepened During the Last Glacial Maximum.” SCIENCE ADVANCES 3.1 (2017): n. pag. Print.
@article{8507675,
  abstract     = {The gradient of air temperature with elevation (the temperature lapse rate) in the tropics is predicted to become less steep during the coming century as surface temperature rises, enhancing the threat of warming in high-mountain environments. However, the sensitivity of the lapse rate to climate change is uncertain because of poor constraints on high-elevation temperature during past climate states. We present a 25,000-year temperature reconstruction from Mount Kenya, East Africa, which demonstrates that cooling during the Last Glacial Maximum was amplified with elevation and hence that the lapse rate was significantly steeper than today. Comparison of our data with paleoclimate simulations indicates that state-of-the-art models underestimate this lapse-rate change. Consequently, future high-elevation tropical warming may be even greater than predicted.},
  articleno    = {e1600815},
  author       = {Loomis, Shannon E and Russell, James M and Verschuren, Dirk and Morrill, Carrie and De Cort, Gijs and Sinninghe Damst{\'e}, Jaap S and Olago, Daniel and Eggermont, Hilde and Street-Perrott, F Alayne and Kelly, Meredith A},
  issn         = {2375-2548},
  journal      = {SCIENCE ADVANCES},
  keyword      = {SEA-SURFACE TEMPERATURE,EQUATORIAL EAST-AFRICA,CLIMATE MODEL,ICE-SHEET,LAKE,CALIBRATION,PROXY,RECONSTRUCTIONS,GEOCHEMISTRY,DEGLACIATION},
  language     = {eng},
  number       = {1},
  pages        = {7},
  title        = {The tropical lapse rate steepened during the Last Glacial Maximum},
  url          = {http://dx.doi.org/10.1126/sciadv.1600815},
  volume       = {3},
  year         = {2017},
}

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