noaa-recon-12907 Southern-Central England 1000 Year March-July Precipitation Reconstruction Wilson, R.J.S.; Miles, D.W.H.; Loader, N.J.; Melvin, T.M.; Cunningham, L.K.; Cooper, R.J.; Briffa, K.R. Southern-Central England 1000 Year March-July Precipitation Reconstruction 2012-05-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/12907 Investigator R.J.S. Wilson Investigator D.W.H. Miles Investigator N.J. Loader Investigator T.M. Melvin Investigator L.K. Cunningham Investigator R.J. Cooper Investigator K.R. Briffa earth science paleoclimate climate reconstructions|tree ring age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,standard,N,100 year spline earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,null earth science paleoclimate climate reconstructions|tree ring precipitation,ring width,null,millimeter,Mar-Jul,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate reconstructions precipitation geoscientificInformation Precipitation Reconstruction precipitation 950 AD 2009 AD 1000 cal yr BP -59 cal yr BP Complete 51 52.2 -2.5 -1 Continent Europe Northern Europe British Isles United Kingdom Southern-Central England>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Wilson, R., D. Miles, N.J. Loader, T. Melvin, L. Cunningham, R. Cooper, and K. Briffa. 2012. A millennial long March-July precipitation reconstruction for southern-central England. Climate Dynamics, Vol. 40, Issue 3-4, pp. 997-1017, February 2013. doi:10.1007/s00382-012-1318-z

We present a millennial long dendroclimatic reconstruction of spring/summer precipitation for southern-central England. Previous research identified a significant moisture stress signal in ring-width data measured from oak trees growing in southern England. In this study, we build upon this earlier work, specifically targeting south-central England, to derive a well replicated oak ring-width composite chronology using both living and historical material. The data-set includes 352 living trees (AD 1629-2009) and 1540 individual historical series (AD 663-1925). The period expressed by at least 50 trees in any year is AD 980-2009. Calibration experiments identify the optimal seasonal predictand target as March-July precipitation (1901-2007: r2 = 0.33). However, comparison with the long Kew Gardens precipitation record indicates a weakening in tree-growth/ climate response from ~1800 to 1920 which we speculate may be related to smoke and sulphur dioxide (SO2) emissions at that time which may have also contributed to a decrease in tree productivity. The time-series derived using the regional curve standardisation method to capture lower frequency information shows a mediaeval period with alternating multi-decade-long dry and wet periods, with AD 1153-1172 being the wettest reconstructed 20-year period in the whole record. Drier conditions are prevalent from ~1300 to the early sixteenth century followed by a period of increasing precipitation levels. The most recent four centuries of the record appear similar to the mediaeval period with multiple decade-long dry and wet periods. The late twentieth century is the second reconstructed wettest period. These centennial hydroclimatic trends are in broad agreement with independent regional scale hydroclimatic reconstructions from tree-ring (East Anglia), historical, speleothem and peat water level proxy archives in the United Kingdom and appear coupled with reconstructed sea surface temperature changes in the North Atlantic which in turn influence the Atlantic meridional overturning circulation and westerly airflow across the UK. STUDY NOTES: May-July precipitation reconstruction for southern-central England covering the last millennium, based on Oak ring width chronologies. Two chronology versions were developed for the full south-central England composite oak data-set. To maximise high-mid frequency common variability, the ringwidth data were initially detrended using 100-year splines (SPL100). Ring-width data were reprocessed using the regional curve standardisation (RCS) method, which can potentially capture secular-scale variability at frequencies greater than the mean length of the samples. The RCS chronology is referred to as RCSsf, and is utilized for the May-July precipitation reconstruction. Summary information for the individual living ring-width chronologies Site name Code SOURCE County Region #Series FullLength Lat.°N Long.°E Elev.(m) RBAR EPS N(EPS 0.85) Ludlow BRIT010 ITRDB Shropshire CENT 15 1823-1978 52.21 -2.44 185 0.485 0.93 6 Stoneleigh Abbey STO Oxford Warwickshire CENT 16 1701-1998 52.2 -1.32 70 0.241 0.84 17.8 Bradfield BRIT031 ITRDB Warwickshire CENT 10 1879-1984 52.15 -1.15 130 0.42 0.88 7.8 Charlbury BRIT059 ITRDB Oxfordshire SE 17 1828-1979 51.52 -1.3 130 0.473 0.94 6.3 Yanworth BRIT060 ITRDB Gloucestshire SE 24 1738-1979 51.49 -1.54 180 0.427 0.95 7.6 Oakley BRIT4 ITRDB Oxfordshire SE 16 1847-1978 51.48 -1.07 70 0.455 0.93 6.8 Wytham Woods WYT Oxford Oxfordshire SE 22 1766-1999 51.46 -1.2 130 0.396 0.94 8.7 Brasenose Wood BSN Oxford Oxfordshire SE 41 1757-2009 51.44 -1.11 100 0.348 0.96 10.6 Radley BRIT061 ITRDB Oxfordshire SE 18 1812-1979 51.42 -1.13 70 0.531 0.95 5 Hardwick Estate HWK Oxford Oxfordshire SE 21 1764-1999 51.3 -1.02 140 0.301 0.9 13.2 Mapledurham Estate MPL Oxford Oxfordshire SE 73 1751-2009 51.29 -1.01 100 0.252 0.96 16.8 Savernake BRIT063 ITRDB Wiltshire SW 23 1725-2006 51.24 -1.42 170 0.301 0.91 13.2 Salisbury BRIT062 ITRDB Wiltshire SW 10 1797-1968 51.24 -1.42 170 0.457 0.89 6.7 Bath BRIT2 ITRDB Somerset SW 14 1754-1979 51.22 -2.19 45 0.373 0.89 9.5 Crabwood BRIT064 ITRDB Hampshire SE 31 1629-2009 51.04 -1.23 120 0.315 0.93 12.3 RBAR = mean inter-series correlation EPS = expressed population signal N (EPS 0.85) is the theoretical number of trees needed to acquire an EPS value of 0.85 ITRDB - International Tree Ring Data Bank, http://www.ncdc.noaa.gov/paleo/treering.html Oxford - Oxford University tree-ring laboratory. Not publicly archived at this time

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/europe/england2012precip.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/europe/england2012precip.xls USA/NOAA DIF Version 9.8.4 2019-04-11 2019-04-11