Tree Rings
Dendroclimatology is the science of determining past climates from trees (primarily properties of the annual tree rings). Tree rings are wider when conditions favor growth, narrower when times are difficult. Other properties of the annual rings, such as maximum latewood density (MXD) have been shown to be better proxies than simple ring width. Using tree rings, scientists have estimated many local climates for hundreds to thousands of years previous. By combining multiple tree-ring studies (sometimes with other climate proxy records), scientists have estimated past regional and global climates (see Temperature record of the past 1000 years).
Read more about this topic: Proxy (climate)
Famous quotes containing the words tree and/or rings:
“It is, I fear, but a vain show of fulfilling the heathen precept, “Know thyself,” and too often leads to a self-estimate which will subsist in the absence of that fruit by which alone the quality of the tree is made evident.”
—George Eliot [Mary Ann (or Marian)
“We will have rings and things, and fine array,
And kiss me, Kate, we will be married o’ Sunday.”
—William Shakespeare (1564–1616)