date: Mon, 10 Nov 2008 16:42:12 +0000 from: Keith Briffa subject: Re: FW: FOI_08-50 ; EIR_08-01 to: Tim Osborn thanks Tim I think we should tell Dave that in this case we are very busy and need time to look at questions and consider - then say we will provide answer later - what do you think? Keith At 16:27 10/11/2008, you wrote: >Keith and Phil, > >I've had 2 minutes to look at this. Initial responses are below. I >haven't cc'd this to Dave Palmer, in case you want to think about it further. > >Tim > >> >>---------- >>From: Steve McIntyre [mailto:stephen.mcintyre@utoronto.ca] >>Sent: Friday, October 31, 2008 6:40 PM >>To: Palmer Dave Mr (LIB) >>Subject: FOI_08-50 ; EIR_08-01 >> >>Dear Mr Palmer, >> >>This is to note that much of the information requested in FOI >>request (FOI_08-50 ; EIR_08-01) has been posted at >>http://www.cru.uea.ac.uk/~timo/datapages/mxdtrw.htm >>. I've now had an opportunity to examine this data and request the >>following clarification to the information that you provided. >> >>1) Many Schweingruber series ( see listing at >>http://www.ncdc.noaa.gov/paleo/treering-wsl-data.htm) >>within one of the gridboxes listed at the webpage ("Rutherford >>gridbox") (about 109) are excluded from the 341 sites sent to >>Rutherford - an example is the series athapcen. What was the basis >>for excluding this and the other excluded series? Please provide >>any manuals, computer code or correspondence explaining the exclusion. > >The website already provides this information, he should read it >more carefully. > >> 2) A few (3) series are included in the Rutherford roster even >> though they are not within the 4 corners of a Rutherford gridbox >> (irempisy kuba4lag kuba2lag ). What was the basis for including >> these series? Please provide any manuals, computer code, >> documents or correspondence explaining the inclusion. > >I don't understand the question. > >> 3) I examined Gridbox 7(132.5E 72.5N) in more detail. It contains >> one series: omoloyla. The gridded series (#7) has values from >> 1400-1991, but the underlying omoloyla chronology at ITRDB only >> goes from 1496 to 1991 and the underlying measurement data for >> omoloyla at ITRDB only has values for the period >> 1496-1991. Please provide any manuals, computer code, >> documents or correspondence explaining how the values from >> 1400-1495 were obtained. If a different omoloyla data set was >> used for this study than the data set at ITRDB, would you please >> advise and provide the data actually used in this study. If there >> are similar discrepancies for other sites, would you please >> provide a listing of sites for which the version used differs from >> the ITRDB version. > >I generated estimates of data in some boxes by a multiple regression >model using surrounding gridded MXD data, if it were possible to >extend some shorter grid-box records in this way. We cannot just >give this short answer, since he will then just ask for the >details. I should, therefore, attempt to find the details if we >reply to this question. > >> 4). A few series have incorrect codes (adybogla balyebla >> leshpcob vanc) compared to the Shweingruber codes. Does this >> affect the operation of any computer programs? > >No > >> >>5) Not all series listed at the Osborn webpage are in the ITRDB >>data set. Some examples are: >> >> id name type long lat start end >>327 gartogfi Gartog PCBA 98.52 29.67 1709 1993 >>328 haizefi Haize Shan PCBA 99.50 30.30 1777 1993 >>329 lhamafi Lhamcoka PCBA 99.12 31.82 1784 1994 >>330 lhambfi Lhamcoka PCBA 99.13 31.80 1669 1994 >>331 lhamcfi Lhamcoka PCBA 99.10 31.82 1768 1994 >>332 lhamdfi Lhamcoka PCBA 99.10 31.82 1630 1994 >>333 qamdofi Qamdo PCBA 96.95 31.08 1406 1994 >>334 riwofi1 Riwoqe PCBA 96.48 31.23 1709 1994 >>335 riwofi2 Riwoqe PCBA 96.48 31.30 1673 1994 >>Can you please provide this data. > >I think all the Schweingruber chronologies are on the SO&P website >anyway; originally this was password-protected, but that protection >was probably removed after the end of the SO&P project, so we could >just direct him there. > >> 6) The Tornetrask id tornxx does not match the corresponding >> Schweingruber ids, where there are 3 ids for this site. Can you >> please provide the data set with id tornxx as used in the gridding study. > >I think that this too will be on the SO&P website, as part of the >file containing the MXD chronologies. But I'm not 100% sure and >have no time to look to find this out. > >Tim > > > >Dr Timothy J Osborn, Academic Fellow >Climatic Research Unit >School of Environmental Sciences >University of East Anglia >Norwich NR4 7TJ, UK > >e-mail: t.osborn@uea.ac.uk >phone: +44 1603 592089 >fax: +44 1603 507784 >web: http://www.cru.uea.ac.uk/~timo/ >sunclock: http://www.cru.uea.ac.uk/~timo/sunclock.htm > -- 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/