EVALUATION OF PALEOCLIMATIC PROXIES BY THE RESCALED RANGE METHOD - RESULTS FROM LABRADOR SEA, ODP SITE 646

Rescaled range analysis is tested as a method for comparison and evalu ation of terrestrial and marine paleoclimatic data from the northwest Atlantic Ocean. We calculated the Hurst exponents (H) of oxygen isotop e, foraminifera, dinoflagellate, and pollen-spore records from Ocean D rilling Project Site 646, and compared the Hurst values of these clima tic proxies with the corresponding power spectra. Our study reveals di fferences in Hurst values among several proxy-climatic records from on e location. However. higher Hurst values do not contain more informati on on climatic changes, in contrast to the conclusion of a previous st udy that compared records from continental and oceanic sites. Therefor e, caution is needed when using the Hurst exponent for evaluating the information content of climatic proxies.