Thanks to ice cores the history of the dust cycle and its tight connections with the climatic system were reconstructed. Here we present an update of the current research on the atmospheric dust content of the TALDICE ice core (Ross Sea sector, East Antarctica). Thanks to the application of different techniques it was possible to characterize the mineral particles deposited in the last 150 kyr. New constraints on provenance during the last climatic cycle will be given, showing that peripheral and inner sites, well coupled during glacial stages, present differences in relation to the different atmospheric evolution occurred during the last climatic transition. In addition the analysis of the elemental composition of dust allowed preparing a first and preliminary inventory of the elemental depositional fluxes in Antarctica. This is the first step to define a robust reference to assess the current impact of human activities on Antarctic glaciochemistry. But important results were also achieved looking at the deep disturbed part of TALDICE. For the first time significant weathering affecting particles entrapped in deep ice was appreciated and quantified. Chemical and physical processes alter the composition and aggregation state of dust below a critical depth. Future projects focused on the retrieval of very ancient ice, will need to take into account such phenomena.

Baccolo, G., Delmonte, B., Cibin, G., Clemenza, M., Hampai, D., Marcelli, A., et al. (2018). New results from the mineral dust record of the TALDICE ice core. In Abstract Proceedings, Polar 2018, Davos, 19-23 June 2018 (pp.939-939).

New results from the mineral dust record of the TALDICE ice core

Baccolo, G;Delmonte, B;Clemenza, M;Nastasi, M;Previtali, E;Maggi, V
2018

Abstract

Thanks to ice cores the history of the dust cycle and its tight connections with the climatic system were reconstructed. Here we present an update of the current research on the atmospheric dust content of the TALDICE ice core (Ross Sea sector, East Antarctica). Thanks to the application of different techniques it was possible to characterize the mineral particles deposited in the last 150 kyr. New constraints on provenance during the last climatic cycle will be given, showing that peripheral and inner sites, well coupled during glacial stages, present differences in relation to the different atmospheric evolution occurred during the last climatic transition. In addition the analysis of the elemental composition of dust allowed preparing a first and preliminary inventory of the elemental depositional fluxes in Antarctica. This is the first step to define a robust reference to assess the current impact of human activities on Antarctic glaciochemistry. But important results were also achieved looking at the deep disturbed part of TALDICE. For the first time significant weathering affecting particles entrapped in deep ice was appreciated and quantified. Chemical and physical processes alter the composition and aggregation state of dust below a critical depth. Future projects focused on the retrieval of very ancient ice, will need to take into account such phenomena.
Si
abstract + poster
ice core, Antarctica, atmospheric mineral dust
English
Polar 2018
978-0-948277-54-2
Baccolo, G., Delmonte, B., Cibin, G., Clemenza, M., Hampai, D., Marcelli, A., et al. (2018). New results from the mineral dust record of the TALDICE ice core. In Abstract Proceedings, Polar 2018, Davos, 19-23 June 2018 (pp.939-939).
Baccolo, G; Delmonte, B; Cibin, G; Clemenza, M; Hampai, D; Marcelli, A; Nastasi, M; Previtali, E; Maggi, V
File in questo prodotto:
File Dimensione Formato  
Abstract_Baccolo.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 122.63 kB
Formato Adobe PDF
122.63 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/206024
Citazioni
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
Social impact