##LOAD MBH "SPARSE"
#centered on 1902-1980 
#originally from ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/mann1998/nhem-sparse.dat
 if (method=="online") {
	download.file("http://www.climateaudit.org/data/mbh98/sparse.tab","temp.dat",mode="wb")
	load("temp.dat")} else load("d:/climate/data/mann/sparse.tab")
	sparse=sparse[,1]
	sparse=sparse-mean(sparse[(1902:1980)-1853])