Identifying Probable Submarine Hydrothermal Spots in North Santorini Caldera Using the Generalized Moments Method.

Dura, Ana, Nomikou, Paraskevi, Mertzimekis, Theo J., Hannington, Mark D., Petersen, Sven and Poulos, Serafim (2023) Identifying Probable Submarine Hydrothermal Spots in North Santorini Caldera Using the Generalized Moments Method. Open Access Geosciences, 13 (9). Art.Nr. 269. DOI 10.3390/geosciences13090269.

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Abstract

The presence of active hydrothermal vent fields near residential areas and their possible link to volcanic activity poses a potential hazard to the environment, society, and the economy. By capitalizing on Autonomous Underwater Vehicle sampling methodologies and applying the Generalized Moments Method model for geological and physical processes in these environments, we shed light on the underlying dynamics shaping the physicochemical characteristics of the vents. In this study, we focus on the Northern Caldera of Santorini and, more specifically, on the recorded CTD data (Conductivity, Temperature, Depth). The data sets were collected in 2017 in Santorini using an Autonomous Underwater Vehicle during the GEOMAR POS510 mission. Our research shows that the active vent field within the caldera probably follows a multifractal behavior and exhibits a weak memory effect. Depth Profiles and Time Series show similar behavior among conductivity and temperature. The variance and moments of both parameters underline the existence of two different mechanisms governing the behavior of the vent field. Finally, the structure function shows that changes in the time series are described by a Cauchy–Lorentz distribution.

Document Type: Article
Keywords: active volcanoes; autonomous underwater vehicles; Hellenic Volcanic Arc; hydrothermal vents; Santorini; shallow hydrothermal systems; submarine volcanism in back-arc basins; submarine volcano
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS > Marine Mineralische Rohstoffe
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS
Main POF Topic: PT8: Georesources
Refereed: Yes
Open Access Journal?: Yes
Publisher: MDPI
Related URLs:
Date Deposited: 13 Nov 2023 10:59
Last Modified: 07 Feb 2024 15:37
URI: https://oceanrep.geomar.de/id/eprint/59363

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