Wavelet analysis of relative geomagnetic paleointensity at ODP Site 983

Details Wavelet analysis of relative geomagnetic paleointensity at ODP Site 983 Wavelet analysis of relative geomagnetic paleointensity at ODP Site 983

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000e%26psl.184..109g&link_type=abstract

Earth and Planetary Science Letters, Volume 184, Issue 1, p. 109-123.

Mathematics

Logic

23

Scientific paper

We performed spectral analysis of the record of relative geomagnetic paleointensity obtained at ODP Site 983, covering the time interval 0-1.1 Ma. The results confirm the presence of significant power at frequencies corresponding to the earth orbital parameters (eccentricity, obliquity, precession). The construction of the evolutionary spectrum allowed us to establish the non-stationarity of the signal at those frequencies. The subsequent use of wavelet techniques made it possible to demarcate the time intervals over which orbital frequencies are present in the record. For those intervals, the paleointensity record shows some coherency with the isothermal remanent magnetization, normalizer of the natural remanent magnetization, and the ratio anhysteretic remanent magnetization/k. These results suggest that the orbital frequencies embedded in the paleointensity record are the expression of lithologic variations, and probably not a characteristic of the geodynamo itself. Extracting (filtering) these wavelet components from the Site 983 paleointensity record indicates, however, that this secondary overprint is of sufficiently low level that it has a minor effect on the overall character of the record.

Affiliated with

Also associated with

No associations

Rating

Wavelet analysis of relative geomagnetic paleointensity at ODP Site 983 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Wavelet analysis of relative geomagnetic paleointensity at ODP Site 983, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavelet analysis of relative geomagnetic paleointensity at ODP Site 983 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1042237