Mid-Holocene drying of the U.S. Great Basin recorded in Nevada speleothems

Elena Steponaitis, Alexandra Andrews, David McGee, Jay Quade, Yu Te Hsieh, Wallace S. Broecker, Bryan N. Shuman, Stephen J. Burns, Hai Cheng

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Lake level records point to dramatic changes in Great Basin water balance over the last 25 ka, but the timing and pace of Holocene drying in the region remains poorly documented. Here we present stable isotope and trace metal data from two Lehman Caves, NV speleothems that provide a well-dated record of latest Pleistocene to mid-Holocene hydroclimate in the U.S. Great Basin. Together the stalagmites span the interval between 16.4 ka and 3.8 ka, with a hiatus from 15.0 ka to 12.7 ka. Mg/Ca and δ13C covary throughout the records, consistent with control by the extent of degassing and prior calcite precipitation (PCP); measurements of modern cave and soil waters support PCP as the primary control on drip-water trace-element composition. We therefore interpret Mg/Ca and δ13C as reflecting infiltration rates, with higher values corresponding to drier periods. Both Mg/Ca and δ13C indicate a wet period at the beginning of the record (12.7-8.2 ka) followed by pronounced drying after 8.2 ka. This mid-Holocene drying is consistent with records from around the western United States, including a new compilation of Great Basin lake-level records. The strong temporal correspondence with the collapse of the Laurentide ice sheet over Hudson Bay suggests that this drying may have been triggered by northward movement of the winter storm track as a result of ice sheet retreat. However, we cannot rule out an alternative hypothesis that wet early Holocene conditions are related to equatorial Pacific sea-surface temperature. Regardless, our results suggest that Great Basin water balance in the early Holocene was driven by factors other than orbital changes.

Original languageEnglish (US)
Pages (from-to)174-185
Number of pages12
JournalQuaternary Science Reviews
Volume127
DOIs
StatePublished - Nov 1 2015

Fingerprint

speleothem
drying
Holocene
basins
water
calcite
basin
caves
water balance
trace elements
ice
lake level
Hudson Bay
cave
water budget
Western United States
subversion
surface temperature
stable isotopes
stalagmite

Keywords

  • Great Basin
  • Holocene
  • Paleoclimate
  • Speleothems
  • U-Th dating

ASJC Scopus subject areas

  • Geology
  • Global and Planetary Change
  • Ecology, Evolution, Behavior and Systematics
  • Archaeology
  • Archaeology

Cite this

Steponaitis, E., Andrews, A., McGee, D., Quade, J., Hsieh, Y. T., Broecker, W. S., ... Cheng, H. (2015). Mid-Holocene drying of the U.S. Great Basin recorded in Nevada speleothems. Quaternary Science Reviews, 127, 174-185. https://doi.org/10.1016/j.quascirev.2015.04.011

Mid-Holocene drying of the U.S. Great Basin recorded in Nevada speleothems. / Steponaitis, Elena; Andrews, Alexandra; McGee, David; Quade, Jay; Hsieh, Yu Te; Broecker, Wallace S.; Shuman, Bryan N.; Burns, Stephen J.; Cheng, Hai.

In: Quaternary Science Reviews, Vol. 127, 01.11.2015, p. 174-185.

Research output: Contribution to journalArticle

Steponaitis, E, Andrews, A, McGee, D, Quade, J, Hsieh, YT, Broecker, WS, Shuman, BN, Burns, SJ & Cheng, H 2015, 'Mid-Holocene drying of the U.S. Great Basin recorded in Nevada speleothems', Quaternary Science Reviews, vol. 127, pp. 174-185. https://doi.org/10.1016/j.quascirev.2015.04.011
Steponaitis, Elena ; Andrews, Alexandra ; McGee, David ; Quade, Jay ; Hsieh, Yu Te ; Broecker, Wallace S. ; Shuman, Bryan N. ; Burns, Stephen J. ; Cheng, Hai. / Mid-Holocene drying of the U.S. Great Basin recorded in Nevada speleothems. In: Quaternary Science Reviews. 2015 ; Vol. 127. pp. 174-185.
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