NASA's researchers looked at tree ring
samples from areas including northern Africa, Lebanon, Jordan, Syria and Turkey.
Scientists found droughts in the tree ring
record between the years 1100 and 2012 which corresponded to those described in historical documents.
Dependence of tree ring
stable isotope abundances and ring width on climate in Finnish oak.
These very slow-growing trees in remote landscapes have traditionally provided reliable annual tree ring
Each tree ring
was exactly dated by using standard dendrochronologic methods described by Douglass (17), and earlywood and latewood growth increments were measured by using a stage micrometer.
Our goals within this study were to describe local demographics, fire occurrence, and tree ring
response of this particular oak species, to assess potential factors related to observed decline.
Jonathan Palmer from Gondwana Tree Ring
Laboratory, New Zealand while from Pakistan Prof.
The highest association of tree ring
indices and precipitation was Oct-Apr, thus precipitation from these months was used for the final reconstruction.
See Rocky Mountain Tree Ring
Research reference for detailed information on use and care of increment borers.
The society's Joy Parry, who is retired and lives in Cardiff, said: "He's an authority on tree ring
dating and he's done a lot of diving in various places so we're all looking forward to hearing his lecture.
It has evolved from a tree ring
dating project which established probable building dates for more than 90 properties in the region.
width is one of the most important variables for studying tree growth and climate influence (Tian et al.