cc: "Lotter, prof. dr. A.F." , t.osborn@uea.ac.uk, masson@dsm-mail.saclay.cea.fr, hutterli@climate.unibe.ch, karin@natgeo.su.se, dirk.verschuren@ugent.be, carin.andersson@geo.uib.no, john.birks@bot.uib.no, dan.charman@plymouth.ac.uk, juerg.beer@eawag.ch, hufischer@awi-bremerhaven.de date: Wed, 9 Feb 2005 04:38:32 +0100 (CET) from: Valérie Masson-Delmotte subject: Re: IMPRINT to: "Keith Briffa" Dear all, If you want to restrict 1.1 to annually resolved records then only very few ice core data would fit (Greenland, very relevant for the stability of teleconnections and NAO type reconstructions). The rest of high res proxy data from ice cores and lake seds would fit into 1.2 and/or 1.3 depending on dating controls. As for CO2 various reconstructions : could not it be that part of the discrepancies between ice cores and stomatal proxies can be reconciled if changes in water stress for stomata are included, which would be relevant for 1.4 ?? Valerie > Andy > the tree-ring stuff will all be collated in 1.1. I would suggest ice core > data and varves would be better in 1.2 but would like Valerie to comment > - > in the meantime assume they are in 1.2. 1.4 does include peat and > rhizopods. The CO2 from stomatal density does not fit in the project - we > will get this information from the ice cores. > > Valerie , please comment when you can. Keith > > > At 10:50 08/02/2005, you wrote: >>Dear Keith, >> >>Slowly I am getting an overview over Task 1.2 >>Yet there are still some points that need clarification from your part: >> >>- Does 1.1 include ice-core data, varves and tree rings? I >> assume >>so. This would then also signify that 1.1 would be responsible to collate >>long time series of tree-ring and varve data in relation to Holocene >>climate reconstruction >>- Does 1.4 include peat records and rhizopods? Seeing Dan >> Charman >>as one of the taskleader I assume so, which would also mean that 1.4 >>collates these data >>- What about CO2 reconstructions for the Holocene that do not >>derive from ice-cores? I am thinking of stomatal density derived CO2 >>records. They would fit into 1.5 but I am not sure whether the ice-core >>lobby will be happy to deal with them as they tend to show somewhat >>different results. >> >>Could you let me have a quick answer? >> >>Many thanks, >> >>Andy >> >>******************************************************************* >>Prof. Dr. Andre F. Lotter >>Dept. of Palaeoecology >>Utrecht University >>Laboratory of Palaeobotany and Palynology >>Budapestlaan 4 >>NL-3584 CD Utrecht - The Netherlands >> >>Tel. direct +31 30 2532653 >>Tel. secretary +31 30 2532629 >>Fax +31 30 2535096 >>e-mail a.f.lotter@bio.uu.nl >>WWW >>http://www.bio.uu.nl/~palaeo/Engels/engels.html >> >>******************************************************************* >> > > -- > Professor Keith Briffa, > Climatic Research Unit > University of East Anglia > Norwich, NR4 7TJ, U.K. > > Phone: +44-1603-593909 > Fax: +44-1603-507784 > > http://www.cru.uea.ac.uk/cru/people/briffa/ > -- Valerie. ____________________________________________________________________________ Laboratoire des Sciences du Climat et de l'Environnement (UMR CEA/CNRS 1572) Bat 701, L'Orme des Merisiers CEA Saclay, 91 191 Gif-sur-Yvette cedex , France Tel. (33) 1 69 08 77 15, Fax. (33) 1 69 08 77 16