| Title: |
The new Kr-86 excess ice core proxy for synoptic activity: West Antarctic storminess possibly linked to Intertropical Convergence Zone (ITCZ) movement through the last deglaciation |
| Authors: |
Buizert, Christo; Shackleton, Sarah; Severinghaus, Jeffrey, P; Roberts, William, H G; Seltzer, Alan; Bereiter, Bernhard; Kawamura, Kenji; Baggenstos, Daniel; Orsi, Anaïs, J; Oyabu, Ikumi; Birner, Benjamin; Morgan, Jacob, D; Brook, Edward, J; Etheridge, David, M; Thornton, David; Bertler, Nancy; Pyne, Rebecca, L; Mulvaney, Robert; Mosley-Thompson, Ellen; Neff, Peter, D; Petrenko, Vasilii, V |
| Contributors: |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Glaces et Continents, Climats et Isotopes Stables (GLACCIOS); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
| Source: |
ISSN: 1814-9324. |
| Publisher Information: |
CCSD; European Geosciences Union (EGU) [2005-.] |
| Publication Year: |
2023 |
| Collection: |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
| Subject Terms: |
[SDU]Sciences of the Universe [physics] |
| Description: |
International audience ; Abstract. Here we present a newly developed ice core gas-phase proxy that directly samples a component of the large-scale atmospheric circulation: synoptic-scale pressure variability. Surface pressure changes weakly disrupt gravitational isotopic settling in the firn layer, which is recorded in krypton-86 excess (86Krxs). The 86Krxs may therefore reflect the time-averaged synoptic pressure variability over several years (site “storminess”), but it likely cannot record individual synoptic events as ice core gas samples typically average over several years. We validate 86Krxs using late Holocene ice samples from 11 Antarctic ice cores and 1 Greenland ice core that collectively represent a wide range of surface pressure variability in the modern climate. We find a strong spatial correlation (r=-0.94, p |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.5194/cp-19-579-2023 |
| Availability: |
https://hal.science/hal-04086751; https://hal.science/hal-04086751v1/document; https://hal.science/hal-04086751v1/file/cp-19-579-2023.pdf; https://doi.org/10.5194/cp-19-579-2023 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.52528BC7 |
| Database: |
BASE |