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Middle Holocene humidity increase in Florida: climate or sea-level?

Donders, Timme H.

Quaternary science reviews, 2014-11, Vol.103, p.170-174 [Periódico revisado por pares]

Elsevier Ltd

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  • Título:
    Middle Holocene humidity increase in Florida: climate or sea-level?
  • Autor: Donders, Timme H.
  • Assuntos: El Niño-Southern Oscillation ; Florida ; Freshwater ; Holocene ; Palaeoclimatology ; Pollen ; Sea level change
  • É parte de: Quaternary science reviews, 2014-11, Vol.103, p.170-174
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Florida climate in highly sensitive to both high and low latitude climate perturbations due to its latitudinal position surrounded by water masses that transport heat northward. A well-studied aspect is that middle Holocene conditions became significantly wetter in Florida, initiating widespread peat accumulation in the Everglades. This environmental change has been attributed to various climate forcings, such as migration of the Intertropical Convergence Zone (ITCZ), increases in tropical storm intensity, position of the Bermuda High, intensification of the El Niño Southern Oscillation (ENSO), and post glacial sea level rise (SLR). Discerning between these forcings is only possible with quantitative reconstructions from a transect of sites that are affected differentially. Application of a transfer function on a north-to-south gradient of pollen records from Florida lakes here shows that the pattern of increasing precipitation during the middle Holocene cannot be explained by SLR, but that ENSO intensification is an important contributing factor. Seasonal-resolved proxy records with improved age models are urgently needed to further solve these issues. •A latitudinal transect of Florida pollen records is reinterpreted quantitatively.•Middle and late Holocene humidity increase is greater toward the south.•A prominent role of El Niño – Southern Oscillation during the late Holocene.•Results show little evidence for a direct effect of sea level rise on humidity.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
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