Dataset Title: Volcanic Loading: The Dust Veil Index                            
                                                                                
Contributor:                                                                    
                                                                                
H. H. Lamb                                                                      
Climatic Research Unit                                                          
University of East Anglia                                                       
Norwich, United Kingdom                                                         
                                                                                
Scope of the Data:  This package provides dust veil indices (DVI)               
for the period 1500 A.D. to 1983 A.D. along with estimates for                  
the eruptions of Santorin in 1470 B.C., Vesuvius in 79 A.D., and                
Oraefajokull in 1362 A.D.  Descriptions of individual eruptions                 
and details on the methods used in assessing the DVI of a                       
particular eruption are provided in the critical documents section              
of the documentation (NDP013) that accompanies this data base and               
may be ordered from CDIAC.                                                      
                                                                                
Data Format:  Four ASCII text files are provided in this subdirectory           
including this documentation file (NDP013.TXT), the data file                     
containing the dust veil indices (NDP013.DAT), and a FORTRAN and                
SAS retrieval code to read and print the data file (NDP013.FOR &                
NDP013.SAS).  The data are catalogued by the date of the eruption               
with one line of data per eruption.  The variables and data given               
for each eruption are: YEAR (year of eruption), LAT (latitude of                
volcano), LONG (longitude), NAME (name of volcano), EMAX (maximum               
globe), DVIN (DVI for the Northern Hemisphere), DVIS (DVI for the               
Southern Hemisphere), and RATIO (DVIG/EMAX).  Missing values are                
represented by blank fields.  The data are formatted as:                        
                                                                                
        FORMAT(I4,F6.2,F6.1,26A1,F3.1,2X,I2,4I5)                                
                                                                                
                                                                                
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                          REFERENCES                                            
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LAMB, H. H. 1970.  "VOLCANIC DUST IN THE ATMOSPHERE; WITH A CHRONOLOGY          
     AND ASSESSMENT OF ITS METEOROLOGICAL SIGNIFICANCE".  PHILOSOPHICAL         
     TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON, SERIES A 266: 425-533.        
                                                                                
LAMB, H. H. 1977.  "SUPPLEMENTARY VOLCANIC DUST VEIL ASSESSMENTS".              
     CLIMATE MONITOR 6:57-67.                                                   
                                                                                
LAMB, H. H. 1983.  "UPTAKE OF THE CHRONOLOGY OF ASSESSMENTS OF THE              
     VOLCANIC DUST VEIL INDEX".  CLIMATE MONITOR 12:79-90.                      
                                                                                
KELLY, P. M. AND C. B. SEAR. 1982.  "THE FORMULATION OF LAMB'S DUST             
     VEIL INDEX". PP. 293-298 IN A. DEEPAK, ED. ATMOSPHERIC EFFECTS             
     AND POTENTIAL CLIMATIC IMPACT OF THE 1980 ERUPTIONS OF MOUNT ST.           
     HELENS.  NASA CONFERENCE PUBLICATION 2240, NATIONAL AERONAUTICS AND        
     SPACE ADMINISTRATION, WASHINGTON, DC.