The various sub-directories provided within this master directory contain 
various data and supplementary information related to the publication 
(henceforth referred to as "MBH98"):

Mann, M.E., Bradley, R.S., Hughes, M.K., Global-Scale Temperature Patterns 
and Climate Forcing  Over the Past Six Centuries, Nature, 392, 779-787, 1998. 

Most of these materials have been previously available at the following public
 ftp sites:

ftp://eclogite.geo.umass.edu/pub/mann/MANNETAL98/
ftp://holocene.evsc.virginia.edu/pub/MBH98/

Additional data and information related to Mann et al (1998) publication and 
subsequent related publications can be found at the NOAA Paleoclimatology web 
site:

http://www.ngdc.noaa.gov/paleo/ei/ei_cover.html
http://www.ngdc.noaa.gov/paleo/pubs/mann_99.html
http://www.ngdc.noaa.gov/paleo/pubs/mann1998/frames.htm


The data and supplementary information provided here are organized within the 
following sub-directories (the README file contained within each individual 
sub-directory provides additional details):


I. INSTRUMENTAL

This directory contains:

1.  Instrumental surface temperature eigenvectors (EOFs and PC series), their 
corresponding eigenvalues, and the gridbox centers for the 1082 instrumental 
surface temperature gridpoint series used.

2.  gridpoint temperature standardization factors used to normalize the 1082 
instrumental gridpoint series.

3.  The original Climatic Research Unit (CRU) gridpoint surface temperature 
temperature database from 1854-1993 of Jones and Briffa [1992] used by MBH98 
(this version of the dataset has been replaced by a different surface 
temperature dataset at CRU and is no longer available). A simple fortran 
program that reads in the data is provided. 


II. PROXY

This directory contains:

1.  The 11 distinct matrices of proxy data corresponding to the 11 distinct 
intervals of the stepwise reconstruction described by MBH98

2.  The 11 corresponding files listing the corresponding set of proxy 
indicators, and the weights applied to those proxy indicators in the analysis.

3.  Data matrix containing all 415 individual proxy (and 
instrumental/historical) series contributing to the proxy indicators networks 
used by MBH98.

4.  Updated list of all individual series used by MBH98, with start/end dates 
of series, and references.


III. FIGUREDATA

This directory contains the ime series data shown in MBH98, corresponding to
Figures 5a; 5b; 7.



IV.  METHODS

A supplement to the brief description of methods provided in MBH98, providing 
some additional minor methodological details.