Climate Variability During the Medieval Climate Anomaly and Little Ice Age Based on Ostracod Faunas and Shell Geochemistry from Biscayne Bay, Florida

Thomas M. Cronin, G. Lynn Wingard, Gary S. Dwyer, Peter K Swart, Debra A. Willard, Jessica Albietz

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An 800-year-long environmental history of Biscayne Bay, Florida, is reconstructed from ostracod faunal and shell geochemical (oxygen, carbon isotopes, Mg/Ca ratios) studies of sediment cores from three mudbanks in the central and southern parts of the bay. Using calibrations derived from analyses of modern Biscayne and Florida Bay ostracods, palaeosalinity oscillations associated with changes in precipitation were identified. These oscillations reflect multidecadal- and centennial-scale climate variability associated with the Atlantic Multidecadal Oscillation during the late Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA). Evidence suggests wetter regional climate during the MCA and drier conditions during the LIA. In addition, twentieth century anthropogenic modifications to Everglades hydrology influenced bay circulation and/or processes controlling carbon isotopic composition.

Original languageEnglish (US)
Pages (from-to)241-262
Number of pages22
JournalDevelopments in Quaternary Science
Volume17
DOIs
StatePublished - 2012

Fingerprint

Little Ice Age
Medieval
ostracod
geochemistry
shell
fauna
anomaly
climate
mudbank
oscillation
paleosalinity
Atlantic Multidecadal Oscillation
environmental history
regional climate
twentieth century
sediment core
carbon isotope
hydrology
isotopic composition
calibration

Keywords

  • Atlantic Multidecadal Oscillation
  • Biscayne Bay
  • Little Ice Age
  • Medieval Climate Anomaly
  • Ostracoda

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Geology

Cite this

Climate Variability During the Medieval Climate Anomaly and Little Ice Age Based on Ostracod Faunas and Shell Geochemistry from Biscayne Bay, Florida. / Cronin, Thomas M.; Wingard, G. Lynn; Dwyer, Gary S.; Swart, Peter K; Willard, Debra A.; Albietz, Jessica.

In: Developments in Quaternary Science, Vol. 17, 2012, p. 241-262.

Research output: Contribution to journalArticle

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