tree ring การใช้

• A tree ring rich in carbon-14 suggests an inactive sun, for example.
• He has studied tree rings in 200-year-old spruce and sugar maple trees.
• Tree rings show that pine forests have a fire every few years.
• He's not the first person to use tree rings for establishing dates.
• The tree rings indicate it was planted in the late 17th century.
• But the science of tree rings, dendrochronology, is far more complicated.
• Records of past climate conditions are recovered through tree ring studies or otherwise.
• Tree rings are wider when conditions favor growth, narrower when times are difficult.
• Tiny markings act somewhat like tree rings to indicate rates of enamel formation.
• In cold years, growth slows and the tree ring is thin.
• Dendroclimatology is the use of tree rings as a record of past climates.
• Direct reading of tree ring chronologies is a learned science, for several reasons.
• Additional tree ring studied were conducted in 1938 and 1964 expanded that knowledge.
• The section discussed the divergence problem affecting certain tree ring data.
• Surrounded by tree ring of dry stone walling, and planted with fir trees.
• Structures such as tree rings and the various tissues are often observed features.
• Like tree rings, these can be used to estimate the age of the coral.
• :The tree ring record goes back about 10, 000 years.
• Such varves in meromictic lakes preserve an historical record somewhat like tree rings do.
• Tree rings suggest " distinct drying " beginning in 250.