Organic geochemical records of environmental variability in Lake Malawi during the last 700 years, Part I: The TEX86 temperature record

Lindsay A. Powers, Thomas C. Johnson, Josef P. Werne, Isla S. Castañeda, Ellen C. Hopmans, Jaap S. Sinninghe Damsté, Stefan Schouten

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We have applied the TEX86 paleothermometer to produce a surface water temperature record for Lake Malawi spanning the past 700years. Over much of the record temperature fluctuates from ~24-27°C with a mean of ~25°C; however, there has been a substantial increase in temperature of ~2.0°C during the past ~ 100years. The TEX86 temperature record reveals a strong similarity to the instrumental record; both records demonstrate warming (~0.7-1.4°C) over the past ~50years 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.

Original languageEnglish (US)
Pages (from-to)133-139
Number of pages7
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume303
Issue number1-4
DOIs
StatePublished - Apr 1 2011

Bibliographical note

Funding Information:
We would like to thank the European Association of Organic Geochemists for providing a travel scholarship to LP making this work possible. This research was supported in part by the National Science Foundation grant ATM-0502456 to JPW and NOAA grant NA06OAR4310113 to TCJ and JPW.

Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.

Keywords

  • Archaea
  • Climate change
  • Paleoclimate
  • Paleothermometer

Continental Scientific Drilling Facility tags

  • M98

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