10 Be measured in a GRIP snow pit and modeled using the ECHAM5-HAM general circulation model

• Published in: Geophysical Research Letters
• Main Authors: Heikkilä, U., Beer, J., Jouzel, J., Feichter, J., Kubik, P.
• Other Authors: Swiss Federal Insitute of Aquatic Science and Technology Dübendorf (EAWAG), 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)), Max Planck Institute for Meteorology (MPI-M), Max-Planck-Gesellschaft, Institute for Particle Physics and Astrophysics ETH Zürich (IPA), Department of Physics = Departement Physik ETH Zürich (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)-Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2008
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Greenland; Greenland ice core; Greenland Ice core Project; GRIP; ice core
• Online Access: https://hal.science/hal-03108686; https://hal.science/hal-03108686/document; https://hal.science/hal-03108686/file/2007GL033067.pdf; https://doi.org/10.1029/2007GL033067

International audience Be measured in a Greenland Ice Core Project (GRIP) snow pit (1986-1990) with a seasonal resolution is compared with the ECHAM5-HAM GCM run. The mean modeled 10 Be concentration in ice (1.0Á10 4 atoms/g) agrees well with the measured value (1.2Á10 4 atoms/g). The measured 10 Be deposition flux (88 atoms/m 2 /s) also agrees well with the modeled flux (69 atoms/m 2 /s) and the measured precipitation rate (0.67 mm/day) agrees with the modeled rate (0.61 mm/ day). The mean surface temperature of À31°C estimated from d 18 O is lower than the temperature measured at a nearby weather station (À29°C) and the modeled temperature (À26°C). During the 5-year period the concentrations and deposition fluxes, both measured and modeled, show a decreasing trend consistent with the increase in the solar activity. The variability of the measured and modeled concentrations and deposition fluxes is very similar suggesting that the variability is linked to a variability in production rather than the local meteorology.