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Organic geochemical records of environmental variability in Lake Malawi during the last 700 years, Part I: The TEX86 temperature record
Powers, L.A.; Johnson, T.C.; Werne, J.P.; Castañeda, I.S.; Hopmans, E.C.; Sinninghe Damsté, J.S.; Schouten, S. (2011). Organic geochemical records of environmental variability in Lake Malawi during the last 700 years, Part I: The TEX86 temperature record. Palaeogeogr. Palaeoclimatol. Palaeoecol. 303(1-4): 133-139. dx.doi.org/10.1016/j.palaeo.2010.09.006
In: Palaeogeography, Palaeoclimatology, Palaeoecology. Elsevier: Amsterdam; Tokyo; Oxford; New York. ISSN 0031-0182, more
Peer reviewed article  

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Keyword
Author keywords
    Paleoclimate; Paleothermometer; Climate change; Archaea

Authors  Top 
  • Powers, L.A.
  • Johnson, T.C.
  • Werne, J.P.
  • Castañeda, I.S., more
  • Hopmans, E.C., more
  • Sinninghe Damsté, J.S., more
  • Schouten, S., more

Abstract
    We have applied the TEX86 paleothermometer to produce a surface water temperature record for Lake Malawi spanning the past 700 years. Over much of the record temperature fluctuates from similar to 24-27 degrees C with a mean of similar to 25 degrees C however, there has been a substantial increase in temperature of similar to 2.0 degrees C during the past similar to 100 years. The TEX86 temperature record reveals a strong similarity to the instrumental record: both records demonstrate warming (similar to 0.7-1.4 degrees C) over the past similar to 50 years as well as a cooling anomaly around 1959. Comparison of the TEX86 temperature record with the proxy records of primary productivity suggests that wind induced upwelling and/or precipitation have a strong influence on the surface temperature of Lake Malawi.

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