|
|
|
|
|
The World Data Center for Paleoclimatology features newly archived paleoclimatic data
and climate reconstructions relevant to important issues in paleoclimatology,
plus new services we offer to the scientific community. For a complete listing of data contributions, please click
Search All Paleoclimatology Data
Please check our archived pages for What's New sections for the years: 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, and 1995. Full Chronological Listing of Most Recent Data Contributions What's New for 2013: |
|
|
Nitrogen Cycle in the Ocean, Past and Present (NICOPP) Tesdal et al. 2013 Biogeosciences Volume 10, Number 1, January 2013 Nitrogen Cycle in the Ocean, Past and Present (NICOPP) database of global ocean marine sedimentary δ15N measurements, from both seafloor samples and subseafloor records. |
|
What's New for 2012: |
|
|
|
Holocene Paleoenvironmental Records from Arctic Lake Sediment Edited by Darrell Kaufman Journal of Paleolimnology Special Volume Volume 48, Number 1, May 2012 The 18 papers in this Special Issue of the Journal of Paleolimnology report new records of Holocene environmental and climate change from Arctic lake sediment. At least 15 distinct physical, chemical, and biological properties were analyzed at lakes located across the North American Arctic and subarctic, and northwestern Europe. The studies are notable for their multi-proxy approach (eight present data for at least five different proxies), and for the high quality of their geochronological control |
|
|
Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium Gergis et al. Journal of Climate e-View Early Online Release, May 2012 doi:10.1175/JCLI-D-11-00649.1 This study presents the first multi-proxy warm season (September- February) temperature reconstruction for the combined land and oceanic region of Australasia (0°S-50°S, 110°E-180°E). We perform a 3000-member ensemble Principal Component Reconstruction (PCR) using 27 temperature proxies from the region. The proxy network explained 69% of the inter-annual variance in the HadCRUT3v SONDJF spatial mean temperature over the 1921-1990 calibration period. Applying eight stringent reconstruction 'reliability' metrics identified post A.D. 1430 as the highest quality section of the reconstruction, but also revealed a skillful reconstruction is possible over the full A.D. 1000-2001 period. |
|
|
Western North America Annual Temperature Reconstruction Wahl and Smerdon Geophysical Research Letters Vol. 39, L06703, March 2012, doi:10.1029/2012GL051086 This article presents a tree ring-based reconstruction of western North America annual temperature over 1500-1980, with 5x5 degree grid cell coverage for the region bounded by 30°-55°N and 95°-130°W. A 1000-member probabilistic ensemble derived by bootstrap methods is employed for characterization of uncertainty. A key result based on the ensemble methodology is that the most recent decades are, at the level of the bi-decadal average, very likely the warmest across the region during the past 500 years. The reconstruction is used in a side-by-side comparison with a parallel reconstruction driven by non-informative predictors that have the same temporal autoregressive structure as the tree ring data. The proxy-based reconstruction clearly outperforms the non-informative predictor-based reconstruction across a suite of calibration and validation skill measures. |
|
|
Southern Hemisphere high-resolution palaeoclimate records of the last 2000 years Neukom and Gergis The Holocene Vol. 22, no. 5, pp. 501-524, May 2012. DOI: 10.1177/0959683611427335 This study presents a comprehensive assessment of high-resolution Southern Hemisphere (SH) paleoarchives covering the last 2000 years. We identified 174 monthly to annually resolved climate proxy (tree ring, coral, ice core, documentary, speleothem and sedimentary) records from the Hemisphere. We assess the interannual and decadal sensitivity of each proxy record to large-scale circulation indices from the Pacific, Indian and Southern Ocean regions over the twentieth century. We then analyse the potential of this newly expanded palaeoclimate network to collectively represent predictands (sea surface temperature, sea level pressure, surface air temperature and precipitation) commonly used in climate reconstructions. The key dynamical centres-of-action of the equatorial Indo-Pacific are well captured by the palaeoclimate network, indicating that there is considerable reconstruction potential in this region, particularly in the post AD 1600 period when a number of long coral records are available. |
What's New for 2011:
|
What's New for 2010:
|
What's New for 2009:
|
What's New for 2008:
|
What's New for 2007:
|
What's New for 2006:
|
What's New for 2005:
|
What's New for 2004:
|
What's New for 2003:
|
What's New for 2002:
|
What's New for 2001:
|
What's New for 2000:
|
What's New for 1999:
|
What's New for 1998:
|
What's New for 1997:
|
What's New for 1996:
|
What's New for 1995:
|
|
|
|||
|
|
|
|
|
|
|||
|
http://www.ncdc.noaa.gov/paleo/whatsnew.html Downloaded Thursday, 01-Aug-2013 11:07:03 EDT Last Updated Wednesday, 27-Mar-2013 14:16:39 EDT by paleo@noaa.gov Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments. |