Monthly Archives: octobre 2012

Initial results

The first results from the Ortles ice cores were recently presented at the international paleoclimatology conference IPICS 2012 (International Partnerships in Ice Core Science) in Marseille, France. The cores were drilled last year under the auspices of the international “Ortles Project”.

The “Ortles Project” is an international research project coordinated by the Byrd Polar Research Center, Ohio State University and the autonomous province of Bolzano. The research is funded by the National Science Foundation and includes scientific collaboration with IDPA-CNR Venice, The University of Innsbruck, The University of Bern, The Russian Academy of Sciences, The University of Padova (TeSAF), the geological survey of the province of Bolzano, the University of Pavia, Waterstones srl, and the remote sensing group at EURAC in Bolzano.

 

The research scope uses a series of Ortles ice cores drilled to bedrock as an archive of past climate conditions affecting the Eastern Alps. “The ice core study is accompanied by monitoring the Ortles ice cap as a strategic observatory of climate change affecting high altitude sites, with particular attention to the physical variations in the ice mass and permafrost extent,” explains Roberto Dinale from the provincial hydrological office.

Dr. Paolo Gabrielli presented the initial results from the ice cores that were drilled to bedrock (approximately 75 m depth) one year ago at the summit of Ortles (3859 masl) in Alto Adige. Dr. Gabrielli presented these results at the recent international paleoclimatology conference IPICS 2012 (International Partnerships in Ice Core Science) in Marseille, France.

Although melting has affected the surface of the Ortles glaciers during recent summers, deeper glacial ice has conserved an annual archive of past atmospheric chemistry. The analyses, coordinated by Paolo Gabrielli of the Byrd Polar Research Center, Ohio State University, demonstrate that the ice from a depth of 41 m demonstrate characteristic radioisotope layers resulting from atmospheric nuclear testing in 1963. This marker is identifiable in ice cores from Antartica to Greenland, and is a frequently used stratigraphic marker for dating ice cores. “Along these lines, we also extracted a pine needle at 74 m depth that has been transported by wind to these high altitudes in the past, which allowed us to carbon-14 date the basal Ortles ice to a date of approximately 2664 years before present, which corresponds with the second Iron Age,” explains Dr. Gabrielli.

“These first results”, explains Hanspeter Staffler, director of the civil and fire protection of the province of Bolzano, “ are encouraging as they verify that we were able to recover this important archive of climate and environmental information before they were compromised by melting caused by the increased summer temperatures over the past 30 years”. Ongoing and future analyses will provide more precise climatic indications over the time period encompassed by the Ortles ice cores.

 

Campus di glaciologia 2012

Pochi giorni fa si è conclusa la seconda edizione del Campus di Glaciologia 2012 realizzato dai dipartimenti istruzione di lingua italiana e tedesca della Provincia Autonoma di Bolzano.

VEDI LA GALLERIA FOTOGRAFICA

22 studenti di entrambe le lingue, appartenenti a 11 differenti scuole della provincia di Bolzano, hanno trascorso 5 giorni (dal 17 al 22 Settembre) molto intensi e fatti di incontri con ricercatori, guide e responsabili del Parco dello Stelvio, escursioni sul territorio e laboratori didattici con lo scopo di conoscere da vicino natura, ruolo e metodi di studio dei ghiacciai.

La sede di svolgimento del Campus è stata l’Hotel Franzehohe situato a pochi chilometri dal Passo dello Stelvio sul versante di Bolzano. Il programma del corso ha permesso agli studenti di seguire una presentazione del Dott Gabrielli (Coordinatore scientifico del progetto Ortles) che ha parlato via Skype dagli Stati Uniti. L’escursione si è svolta sul Ghiacciaio di Solda, con l’ausilio di guide alpine e istruttori, ed ha permesso agli studenti di raggiungere la Cima Solda.

Il prossimo appuntamento è  dal 22 al 24 Ottobre 2012 presso l’EURAC (Bolzano) dove si svolgeranno le giornate della Scienza. In quell’occasione gli studenti parleranno della loro esperienza.