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Friday, July 18, 2008

SST Reconstructions

INTRODUCTION

The NCDC webpage for the World Data Center for Paleoclimatology provides access to data sets for reconstructions of a number of variables. Refer to:
http://www.ncdc.noaa.gov/paleo/recons.html

Since I’ve been on an SST kick recently, I decided to download their SST reconstructions that were relatively short term, no longer than 1,000 years, but at least 250 years. I excluded one data set due to the limited number of data points and the sporadic spacing of those readings.

The surprise: There was no hockey stick. Not one. All of the data sets appeared to reflect the real world.

In the following, I provided titles, data citations, links to the data and, where separate, links to the descriptions. For the Indo-Pacific Warm Pool, I also provided ERSST data as a reference to current SST, Figure 4. And for the North Atlantic, since the temperature swings appeared too large, I also provided a comparison to ERSST data, Figure 7. Other than that, the graphs will speak for themselves.

CARIACO BASIN SST RECONSTRUCTION (1221 to 1990)

SUGGESTED DATA CITATION: Black, D.E., et al. 2007.
Cariaco Basin 800 Year Mg/Ca Sea Surface Temperature Reconstruction.
IGBP PAGES/World Data Center for Paleoclimatology
Data Contribution Series # 2007-097.
NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.

Data and Description:
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/black2007/black2007.txt
http://i38.tinypic.com/nearh5.jpg
Figure 1 - Cariaco Basin SST Reconstruction (1221 to 1990)

INDO-PACIFIC WARM POOL SST RECONSTRUCTION (1004 to 1840)
SUGGESTED DATA CITATION: Newton, A., et al. 2007. Indo-Pacific Warm Pool MD9821-60 Last Millennium Mg/Ca, d18O, SST, SSS Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2007-018.NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.

Data and Description:
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/newton2006/newton2006.txt
http://i35.tinypic.com/11rb3ae.jpg
Figure 2 - Indo-Pacific Warm Pool SST Reconstruction (1004 to 1840)

In Figure 3, I shifted the graph scale to cut off much of the spike at 1463 to emphasize the other data. Figure 4 is ERSST.v2 data for the Pacific Warm Pool from 1854 to 2007 that I provided as a reference.
http://i34.tinypic.com/2wg7hxy.jpg
Figure 3 - Indo-Pacific Warm Pool SST Reconstruction (1004 to 1840) Scale Reduced

http://i34.tinypic.com/16li5g1.jpg
Figure 4 - Pacific Warm Pool (1854 to 2007) as Reference

NINO3 SST ANOMALY RECONSTRUCTION (1408 to 1978)

SUGGESTED DATA CITATION: Cook, E.R., 2000,
Nino 3 Index Reconstruction. International Tree-Ring Data Bank.
IGBP PAGES/World Data Center-A for Paleoclimatology
Data Contribution Series #2000-052.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

Data and Description
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/nino3_recon.txt
http://i33.tinypic.com/2n6su4y.jpg
Figure 5 - NINO3 SST Anomaly Reconstruction (1408 to 1978)

NORTH ATLANTIC SST ANOMALY RECONSTRUCTION (1567 to 1990)
SUGGESTED DATA CITATION: Gray, S.T., et al.. 2004.Atlantic Multidecadal Oscillation (AMO) Index Reconstruction.IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2004-062. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

Data and Description
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/amo-gray2004.txt
http://i36.tinypic.com/wld5kl.jpg
Figure 6 - North Atlantic SST Anomaly Reconstruction (1567 to 1990)

http://i37.tinypic.com/yhxj8.jpg
Figure 7 - North Atlantic SST Anomaly Reconstruction vs ERSST for North Atlantic

SUBTROPICAL SOUTH PACIFIC SST RECONSTRUCTION

SUGGESTED DATA CITATION: Linsley, B. et al., 2000,
Rarotonga Sr/Ca and SST Reconstruction Data, IGBP PAGES/
World Data Center for Paleoclimatology
Data Contribution Series #2000-065.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

Overview
http://www.ncdc.noaa.gov/paleo/pubs/linsley2000/linsley2000.html

Data
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/rarotonga_sr-ca.txt
http://i35.tinypic.com/zluhqw.jpg
Figure 8 - Subtropical South Pacific SST Reconstruction (1726 to 1997) -Raw

http://i33.tinypic.com/2rm0e3d.jpg
Figure 9 - Subtropical South Pacific SST Reconstruction (1726 to 1997) – Smoothed

2 comments:

Greg said...

Just found this post from WUWT. What's with the giant spike in some of the graphs?

Bob Tisdale said...

Greg: Sorry, I haven’t the slightest idea about the spikes. You’ll have to refer to the respective papers:

For Figure 1, Black et al, An 8-century tropical Atlantic SST record from the Cariaco Basin: Baseline variability, twentieth-century warming, and Atlantic hurricane frequency:
http://www.agu.org/pubs/crossref/2007/2007PA001427.shtml

For Figure 2, Newton et al, Climate and hydrographic variability in the Indo-Pacific Warm Pool during the last millennium:
http://www.agu.org/pubs/crossref/2006/2006GL027234.shtml

For Figure 6, Gray et al, A tree-ring based reconstruction of the Atlantic Multidecadal
Oscillation since 1567 A.D.:
http://wwwpaztcn.wr.usgs.gov/julio_pdf/Gray_ea_AMO.pdf

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