Hoffmann-Abdi, KirstinMeyer, HannoFernandoy, FranciscoFreitag, JohannesShaw, Fyntan M.Werner, MartinThomas, Elizabeth R.McConnell, Joseph R.Schneider, Christoph2024-07-122024-07-122023Journal of Glaciology. 20232023https://repositorio.unab.cl/handle/ria/58442Indexación: ScopusAcknowledgments: The presented work was partially funded by the FONDECYT project 11121551. Kirstin Hoffmann-Abdi was funded by an Elsa-Neumann Ph.D. scholarship awarded by the state of Berlin, Germany. We thank the Chilean government, i.e. the Instituto Antártico Chileno (INACH) and the Fuerza Aérea de Chile (FACH) for their support in the organization of field campaigns and for providing logistical facilities. We highly acknowledge the support of Delia Rodríguez Oroz and Dieter Tetzner in carrying out fieldwork and the support of the involved laboratory personnel at AWI, UNAB, BAS and DRI. We thank Sina Spors for her help with HYSPLIT backward trajectory modelling. We also thank two anonymous referees for their constructive comments that helped to substantially improve the manuscript.Stable water isotope records of six firn cores retrieved from two adjacent plateaus on the northern Antarctic Peninsula between 2014 and 2016 are presented and investigated for their connections with firn-core glacio-chemical data, meteorological records and modelling results. Average annual accumulation rates of 2500 kg m-2 a-1 largely reduce the modification of isotopic signals in the snowpack by post-depositional processes, allowing excellent signal preservation in space and time. Comparison of firn-core and ECHAM6-wiso modelled δ18O and d-excess records reveals a large agreement on annual and sub-annual scales, suggesting firn-core stable water isotopes to be representative of specific synoptic situations. The six firn cores exhibit highly similar isotopic patterns in the overlapping period (2013), which seem to be related to temporal changes in moisture sources rather than local near-surface air temperatures. Backward trajectories calculated with the HYSPLIT model suggest that prominent δ18O minima in 2013 associated with elevated sea salt concentrations are related to long-range moisture transport dominated by westerly winds during positive SAM phases. In contrast, a broad δ18O maximum in the same year accompanied by increased concentrations of black carbon and mineral dust corresponds to the advection of more locally derived moisture with northerly flow components (South America) when the SAM is negative. Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of The International Glaciological Society.enAccumulationAntarctic GlaciologyIce/Atmosphere InteractionsPolar FirnSnow and Ice ChemistryArtículoCC BY 4.0 ATTRIBUTION 4.0 INTERNATIONAL Deed10.1017/jog.2023.79