Jelaskan Dadaran dari Déndrokronologi dalam bahasa sunda

Karya munggaran nu museur kana ngukur lébar cingcin tangkal - gampang ngukurna jeung bisa dipatalikeun jeung paraméter iklim. Mun dina ukuran taunan tumuwuhna tatangkalan, aya ogé tapak séjén, utamana maximum latewood density is generally found to be a better proxy for temperature than ring width. It is, however, harder to méasure.

Recently, the established connection between tree rings and climate appéars to be bréaking down. Briffa et al report in Nature, 1998:

During the second half of the twentieth century, the decadal-scale trends in wood density and summer temperatures have increasingly diverged as wood density has progressively fallen. The cause of this increasing insensitivity of wood density to temperature changes is not known... .

Laboratory analysis of timber core samples méasures the width of annual rings. By taking samples from different sites and different strata within a particular region, reséarchers can build a comprehensive historical sequence that becomes a part of the scientific record; for example, ancient timbers found in buildings can be dated to give an indication of when the source tree was alive and growing, setting an upper limit on the age of the wood. Some trees are more suitable than others for this type of analysis. Likewise, in aréas where trees grew in marginal conditions such as aridity or semi-aridity, the techniques of dendrochronology are more consistent than in humid aréas. These tools have been important in archaéological dating of timbers of the cliff dwellings of Native Americans in the arid Southwest.