date: Fri, 6 Mar 2009 09:58:00 -0700 from: Darrell Kaufman subject: Re: 2k Arctic synthesis to: Keith Briffa Keith: Thanks for the update. I'd like to revise the composite proxy record over the weekend (my only spare time). Can I assume that I need to omit the three tree-ring series that I took from Mann et al. (2008) because they were not processed to retain the low frequency signal, and that I should replace the Euraisan series with the three from your recent Phil Trans paper (using the data on your website)? If you agree, I can work on revising all of the calculations and figures and we can modify the text early next week. Would that work? Darrell On Mar 6, 2009, at 9:52 AM, Keith Briffa wrote: > Darrell > REALLY sorry - have not done this yet - had back > to back meetings for 2 days and am due to leave > now for the weekend - couple of days away from > computer - my comments are nothing earth > shattering or voluminous but I would still like > to make them for your consideration. I will try > to do this on Monday now - if too late - just ignore me . Sorry again > Keith > > thanks for your consideration > cheers > Keith > > At 15:01 03/03/2009, you wrote: >> Keith: >> I appreciate your willingness to squeeze this in on such short >> notice. If you could get your comments to me by the end of the week, >> that would be more than I had hoped for. Thank you. Darrell >> >> >> On Mar 3, 2009, at 7:56 AM, Keith Briffa wrote: >> >>> Darrell >>> I would like to make some comments but the >>> earliest I can get to this is Thursday (we have >>> visitors here all day tomorrow. In short I would >>> like to be involved - but I would rather wait and >>> see the basis of your reaction to my initial >>> thoughts when I get a Tracked changes version >>> back to you. You are correct that there are >>> clear limitations in the preservation of trend >>> over two millennia in SOME of the data Mann et al >>> used - and in the current series you cite for >>> Yamal (Hantemirov et al) . I do believe that the >>> composite series in our Phil Trans paper is a >>> convenient representation of the circum-western >>> Eurasian Arctic tree-line data - though the Grudd >>> and Nauzbaev papers are virtually similar to our >>> data for their areas. However I have a few >>> reservations/comments on other aspects of the >>> manuscript that I believe any likely referee >>> might pick up on . Is it ok to wait til Thursday >>> or will this not be acceptable for getting >>> comments back? I know how these time lines are crucial. Best wishes >>> Keith >>> >>> At 14:15 02/03/2009, you wrote: >>>> Hello Keith: >>>> Following the recommendations of Malcolm and Phil (via Ray), it's >>>> clear that I should have come to you sooner. I am now well along >>>> on a >>>> manuscript that summarizes 2000-year-long proxy temperature records >>>> from the Arctic (attached). The impetus for the paper is the new >>>> compilation of high-resolution lake records that my group recently >>>> published in J Paleolimnology. >>>> >>>> On the tree-ring side, it's clear to me now that I should not have >>>> used the series from the Mann et al. compilation, and I hadn't see >>>> your 2008 Phil Trans paper until just last week. As far as I can >>>> tell, the only records that meet the criteria for this study are >>>> your >>>> three new RCS series from Eurasia and D'Arrigo's Gulf of Alaska >>>> record. Apparently, none of the Malcolm's series in Mann et al. >>>> were >>>> processed in a way that would preserve the millennial trend, and >>>> these should be omitted from the synthesis. >>>> >>>> I now need to substantially revamp the manuscript. Before I do, I >>>> want to be sure that I get it right this time and hope that you >>>> will >>>> be interested in joining as co-author to help guide the tree-ring >>>> component of the synthesis. I see that you have posted the Phil >>>> Trans >>>> data on your website, but would much prefer to have your >>>> involvement >>>> before using the data. >>>> >>>> Unfortunately, the timing for submission is an issue. I am >>>> leading a >>>> 12-PI proposal that is currently pending and would benefit >>>> greatly if >>>> this paper were accepted for publication. >>>> >>>> Please have a look at the manuscript, which I realize needs >>>> substantial revisions, and let me know if you have time and >>>> interest >>>> in getting involved. >>>> >>>> Thanks, >>>> Darrell >>>>  >>>> >>>> Darrell S. Kaufman >>>> Professor of Geology and Environmental Sciences >>>> Northern Arizona University >>>> 928-523-7192 >>>> http://jan.ucc.nau.edu/~dsk5/ >>>> >>>> >>>> >>>> >>>> >>>> Hello Keith: >>>> Following the recommendations of Malcolm and >>>> Phil (via Ray), it's clear that I should have >>>> come to you sooner. I am now well along on a >>>> manuscript that summarizes 2000-year-long proxy >>>> temperature records from the Arctic (attached). >>>> The impetus for the paper is the new compilation >>>> of high-resolution lake records that my group >>>> recently published in J Paleolimnology. >>>> >>>> On the tree-ring side, it's clear to me now that >>>> I should not have used the series from the Mann >>>> et al. compilation, and I hadn't see your 2008 >>>> Phil Trans paper until just last week. As far as >>>> I can tell, the only records that meet the >>>> criteria for this study are your three new RCS >>>> series from Eurasia and D'Arrigo's Gulf of >>>> Alaska record. Apparently, none of the Malcolm's >>>> series in Mann et al. were processed in a way >>>> that would preserve the millennial trend, and >>>> these should be omitted from the synthesis. >>>> >>>> I now need to substantially revamp the >>>> manuscript. Before I do, I want to be sure that >>>> I get it right this time and hope that you will >>>> be interested in joining as co-author to help >>>> guide the tree-ring component of the synthesis. >>>> I see that you have posted the Phil Trans data >>>> on your website, but would much prefer to have >>>> your involvement before using the data. >>>> >>>> Unfortunately, the timing for submission is an >>>> issue. I am leading a 12-PI proposal that is >>>> currently pending and would benefit greatly if >>>> this paper were accepted for publication. >>>> >>>> Please have a look at the manuscript, which I >>>> realize needs substantial revisions, and let me >>>> know if you have time and interest in getting involved. >>>> >>>> Thanks, >>>> Darrell >>>> >>>> >>>> >>>> Darrell S. Kaufman >>>> Professor of Geology and Environmental Sciences >>>> Northern Arizona University >>>> 928-523-7192 >>>> http://jan.ucc.nau.edu/~dsk5/ >>> >>> -- >>> 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/ >> >> -- >> 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/ >