cc: t.osborn@uea.ac.uk, k.briffa@uea.ac.uk date: Fri, 10 Feb 2006 21:42:15 -0000 (GMT) from: "Tim Osborn" subject: Re: Osborn and Briffa 2006 NH temp. data archived to: "Bruce Bauer" Brilliant, thanks Bruce. Tim On Fri, February 10, 2006 4:28 pm, Bruce Bauer wrote: > Hi Tim, > The data from your Science paper is now available from the WDC Paleo > website. Hopefully the few-hour delay after publication won't cause too > much of an uproar!! :) > > I put all the series in a single text file, with our standard > documentation header, which is copied below for your inspection. As I > mentioned earlier, the paper is featured in our What's New section: > http://www.ncdc.noaa.gov/paleo/whatsnew.html and > http://www.ncdc.noaa.gov/paleo/pubs/osborn2006/osborn2006.html > as well as the Climate Reconstructions web page: > http://www.ncdc.noaa.gov/paleo/recons.html > Please let me know if you have suggestions for improvement to any of > these. I will be out of the office next week, but can do updates upon my > return. > Thanks very much for contributing the data! > Cheers, Bruce > > Tim Osborn wrote: > >> That's great, Bruce. Looking forward to seeing it later today (already >> sceptics have been complaining that I haven't archived the data!). >> >> Cheers >> >> Tim >> >> At 00:17 08/02/2006, Bruce Bauer wrote: >> >>> Dear Tim, >>> Congratulations on your upcoming Science paper, and thanks very much >>> for contributing the data. You have provided everything I need, >>> except a few details I will obtain from Science online when the paper >>> is posted. If we have no technical glitches, the data should be >>> available via our "Whats New" web page friday morning in the US, >>> friday afternoon in Norwich. The web address is: >>> http://www.ncdc.noaa.gov/paleo/whatsnew.html >>> I'll let you know when it is all set! >>> Thanks, Bruce >>> >>> >>> Tim Osborn wrote: >>> >>>> Dear Connie / WDC-Paleo, >>>> >>>> Together with Keith Briffa, I have a paper that is being published >>>> in Science next week (10-Feb-2006) about Northern Hemisphere >>>> temperature variations over the last 1200 years. >>>> >>>> We would like to provide the data to WDC-Paleo so that it can be >>>> made available for people to download once the paper is published. >>>> >>>> I wasn't entirely sure what information you required, because it is >>>> a mixture of individual records that already exist (which we have >>>> used for our analysis) plus the results of our analysis itself, >>>> which is various dimensionless indicators of the relative spatial >>>> extent of warm or cold conditions. >>>> >>>> I have attached some ASCII files: >>>> >>>> wdc_paleo_osborn2006_header.txt contains a description of the data >>>> etc. >>>> >>>> osborn2006_fig 1,2,3A-C,3D .dat each contain the data shown in a >>>> particular figure of our paper. >>>> >>>> Science have a strict embargo on our paper until next Thursday >>>> afternoon (9-Feb-06), but I can provide a copy of the manuscript >>>> page proofs if you need to see the paper, provided it isn't >>>> forwarded to anyone else. >>>> >>>> Please let me know what else you need (e.g. one of the figures from >>>> our paper) and whether/when this can all go ahead. >>>> >>>> Best regards >>>> >>>> Tim >>> > Spatial Extent of Warm and Cold Conditions over the Northern Hemisphere > Since 800 AD > ----------------------------------------------------------------------- > World Data Center for Paleoclimatology, Boulder > and > NOAA Paleoclimatology Program > ----------------------------------------------------------------------- > NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! > > > NAME OF DATA SET: > Spatial Extent of Warm and Cold Conditions over the Northern Hemisphere > Since 800 AD > LAST UPDATE: 2/2006 (Original receipt by WDC Paleo) > > CONTRIBUTORS: Tim Osborn and Keith Briffa > Climatic Research Unit, School of Environmental Sciences, > University of East Anglia, Norwich, UK > > IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2006-009 > > SUGGESTED DATA CITATION: Osborn, T.J. and K.R. Briffa. 2006. > Spatial Extent of Warm and Cold Conditions over the Northern Hemisphere > Since 800 AD. > IGBP PAGES/World Data Center for Paleoclimatology > Data Contribution Series # 2006-009. > NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. > > ORIGINAL REFERENCE: > Osborn, T.J. and K.R. Briffa. 2006. > The spatial extent of 20th century warmth in the context of the past > 1200 years. > Science, Vol 311, Issue 5762, 10 February 2006. > > > ABSTRACT: > Periods of widespread warmth or cold are identified by positive or > negative > deviations that are synchronous across a number of temperature-sensitive > proxy records drawn from the Northern Hemisphere. The most significant and > longest duration feature during the last 1200 years is the geographical > extent of warmth in the middle to late 20th century. Positive anomalies > during 890 to 1170 and negative anomalies during 1580 to 1850 are > consistent > with the concepts of a Medieval Warm Period and a Little Ice Age, > but comparison with instrumental temperatures shows the spatial extent of > recent warmth to be of greater significance than that during the > medieval period. > > > GEOGRAPHIC REGION: Northern Hemisphere land masses > PERIOD OF RECORD: 800 - 1995 AD > > > FUNDING SOURCE: > This analysis was supported by the European Community under research > contract EVK2-CT2002-00160 SOAP. > > DESCRIPTION: > Four data files are provided, linked directly to the three figures shown > in the publication. > The figure captions provide the necessary description of the data. > > Fig. 1. The 14 temperature-related proxy records used in this study, > filtered to remove > variations on time scales less than 20 years and then normalised to have > zero mean > and unit standard deviation during the period from 800 to 1995 [with > adjustments made > to the shorter records]. > > Fig. 2. Fraction of the records available in each year that have > normalized values > 0, > 1, > 2, > < 0, < -1, and < -2, with the latter three series multiplied by –1. The > series are shown from > 800 to 1995 and have been filtered to remove variations on time scales > less than 20 years. > > Fig. 3A-C & Fig. 3D provided as separate files. > Fig. 3. Difference between the fraction of the records available in each > year that have normalized > values (A) > 0 and < 0, (B) > 1 and < -1, (C) > 2 and < -2, and (D) as > (A) but using a shorter (1865 > to 1995) reference period for normalization. The difference series are > shown for 800 to 1995 and have > been filtered to remove variations on time scales less than 20 years. > Zero indicates that the number of > series exceeding the upper threshold equals those with values below the > lower threshold. > In (D), results based on annual-mean instrumental temperatures from grid > boxes throughout the NH (red > curve) or only in regions close to the proxy records (green curve) are > shown for 1856 to 2004 (also > normalized over the period from 1856 to 1995). > > > -- > ******************************************************* > Bruce Bauer, Data Manager > World Data Center for Paleoclimatology and > NOAA's National Climatic Data Center, Paleoclimatology Branch > 325 Broadway, E/CC23, Boulder, CO 80305-3328 USA > Phone: (303) 497-6280 FAX: (303) 497-6513 > Email: Bruce.A.Bauer@NOAA.gov > FTP: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/ > Web: http://www.ncdc.noaa.gov/paleo/paleo.html > ******************************************************** > > >