secular variation
31вековой ход — šimtmetinis svyravimas statusas T sritis fizika atitikmenys: angl. secular variation vok. säkulare Schwankung, f rus. вековое колебание, n; вековой ход, m pranc. marche séculaire, f; variation progressive, f; variation séculaire, f …
32Extinction event — …
33Oscurecimiento global — Contaminación Contaminación atmosférica Lluvia ácida • Índice de calidad del aire • Modelos de dispersión en la atmósfera • Clorofluorocarbonos • Oscurecimiento global • Calentamiento g …
34Ozone depletion — Image of the largest Antarctic ozone hole ever recorded (September 2006) Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth s… …
35Paleomagnetism — is the study of the record of the Earth s magnetic field preserved in various magnetic minerals through time. The study of paleomagnetism has demonstrated that the Earth s magnetic field varies substantially in both orientation and intensity… …
36Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …
37Liviu Constantinescu — (26 November 1914 – 29 November 1997) was a Romanian geophysicist, professor of geophysics, member of the Romanian Academy. He was the cofounder, together with Sabba S. Ştefănescu, of the Romanian school of geophysics.BiographyBorn into an old… …
38Decomposition of time series — The decomposition of time series is a statistical method that deconstructs a time series into notional components. There are two principal types of decomposition which are outlined below. Contents 1 Decomposition based on rates of change 2… …
39Magnetic Surveying in Archaeology (book) — Magnetic Surveying in Archaeology (Wormianum, 2008, ISBN 978 87 89531 29 8) is a book written by Russian archaeologist T. N. Smekalova together with O. Voss and S. L. Smekalov. In the book researches collected information about magnetic… …
40Metonic cycle — Heliocentric Solar System In astronomy and calendar studies, the Metonic cycle or Enneadecaeteris (from Greek words for nineteen years) is a period of very close to 19 years which is remarkable for being very nearly a common multiple of the solar …
