Tidal modulation of temperature oscillations monitored in borehole Yaxcopoil-1 (Yucatán, Mexico)

0330215 - GFÚ 2010 RIV NL eng J - Journal Article
Čermák, Vladimír - Bodri, L. - Šafanda, Jan
Tidal modulation of temperature oscillations monitored in borehole Yaxcopoil-1 (Yucatán, Mexico).
Earth and Planetary Science Letters. Roč. 282, č. 1-4 (2009), s. 131-139. ISSN 0012-821X. E-ISSN 1385-013X
R&D Projects: GA AV ČR(CZ) IAA300120603; GA ČR(CZ) GA205/06/1181
Institutional research plan: CEZ:AV0Z30120515
Keywords : temperature monitoring * borehole convection * tidal forcing * recurrence quantification interval * (RQI) analysis * histograms cumulation technique
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 4.062, year: 2009

For better understanding of temperature state in the subsurface, temperature-depth logs can be suitably completed by high-resolution long-run temperature-time monitoring at selected depths. The results of temperature monitoring at three depth levels in borehole Yaxcopoil-1, Chicxulub impact structure, Mexico (April/May 2006) proved that even when a borehole is in “fully” stabilized conditions, temperature may exhibit certain unrest resembling irregular oscillations in the order of hundredths or (in the extreme case) even first tenths of degree. Two novel methods for detection of the weak fingerprints of stable periodic components in long noisy records, namely the RQI (Recurrence Quantification Interval) analysis and the HiCum (Histograms Cumulation) were used to isolate the constituents with tidal periodicities from temperature oscillations measured in borehole Yaxcopoil-1.
Permanent Link: http://hdl.handle.net/11104/0176057