Document Type

Article

Publication Date

3-1-2023

Abstract

Although many studies have attempted to reconstruct millennial-scale hurricane patterns using various proxy-based methods, it is still unclear what the most effective proxies are to identify storm surge deposits in different environmental settings. This study quantitatively compares the application of grain-size, loss-on-ignition, stable isotopes, X-ray fluorescence, and palynological proxies in paleotempestology from an organic-rich environment in the Florida Everglades. The nonparametric tests indicate that only 9 among the 27 parameters (mean diameter, %water, %organic, %carbonate, Ca, Sr, Ca/Ti, Cl/Br, and marine microfossils) exhibited significant differences between storm-surge and in situ deposits. The principal component analysis shows that five marine indicators (Sr, Ca, Ca/Ti, %Carbonate, and Marine microfossils) have the closest association with the allochthonous samples, while Cl/Br and Mz are the most sensitive proxies in low- and high-energy environments, respectively. Moreover, organic geochemical proxies (e.g., δ13C and δ15N of bulk sedimentary organic matter) are ineffective for identifying storm-surge deposits in organic-rich mangrove environments.

Publication Source (Journal or Book title)

Geochemistry Geophysics Geosystems

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