Climate oscillation

Climate oscillation

A climate oscillation is any oscillation within global or regional climate. These fluctuations in atmospheric temperature, sea surface temperature, precipitation or other parameters can be quasi-periodic, often occurring on inter-annual, multi-annual, decadal, multidecadal, century-wide, millennial or longer timescales. A prominent example is the El Niño-Southern Oscillation, involving sea surface temperatures along a strech of the equatorial Central and East Pacific Ocean and the western coast of tropical South America, but which affects climate worldwide.

Contents

Origins and causes

There are close correlations between Earth's climate oscillations and astronomical factors (barycenter changes, solar variation, cosmic ray flux, Milankovic cycles), and modes of heat distribution between the ocean-atmosphere climate system. In some cases, current, historical and paleoclimatological natural oscillations may be masked by significant volcanic eruptions, impact events, irregularities in climate proxy data, positive feedback processes or anthropogenic emissions of substances such as greenhouse gases.[1][2]

Effects

Extreme phases of short-term climate oscillations such as ENSO can result in characteristic patterns of floods and droughts, monsoonal disruption and extreme temperatures in the form of heat waves and cold waves. Shorter-term climate oscillations typically do not directly result in climate change. However, the effects of underlying climate trends such as recent global warming and oscillations can be cumulative to global temperature, producing shorter-term fluctuations in the instrumental and satellite temperature records.

References

  1. ^ Scafetta, Nicola (May 15, 2010). "Empirical evidence for a celestial origin of the climate oscillations". Journal of Atmospheric and Solar-Terrestrial Physics 72: 951–970. doi:10.1016/j.jastp.2010.04.015. http://www.fel.duke.edu/~scafetta/pdf/scafetta-JSTP2.pdf. Retrieved 20 July 2011. 
  2. ^ Curry, Judith. "Scafetta on climate oscillations". WordPress. Climate Etc.. http://judithcurry.com/2011/04/14/scafetta-on-climate-oscillations/. Retrieved 20 July 2011. 

External links



Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Climate pattern — A climate pattern is any recurring characteristic of the climate. Climate patterns can last tens of thousands of years, like the glacial and interglacial periods within ice ages, or repeat each year, like monsoons.[1] A climate pattern may come… …   Wikipedia

  • Oscillation décennale du Pacifique — Diagramme des anomalies de température causées par La Niña et l’oscillation décennale du Pacifique en avril 2008 (Source : NASA) L’oscillation décennale du Pacifique (ODP) est une variation de la température de surface de la mer dans le… …   Wikipédia en Français

  • Oscillation — For other uses, see oscillator (disambiguation) and oscillation (mathematics). An undamped spring–mass system is an oscillatory system. Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a… …   Wikipedia

  • Oscillation de madden-julian — Graphique montrant la variation temporelle (ordonnée) et longitudinale (abscisse) du taux de convection par rapport à la normale ce qui indique la progression du MJO. Les zones orangées étant un surplus et celles bleues un déficit. Noter la… …   Wikipédia en Français

  • Climate of Australia — Climate map of Australia, based on the Köppen climate classification …   Wikipedia

  • Oscillation atlantique multidécennale — Oscillation entre 1856 et 1999 qui montre un cycle qui s étend sur plusieurs décennies L’oscillation atlantique multidécennale (OAM) est une variation de la température de surface de la mer qui s étend sur plusieurs décennies, de 40 à 80 ans,… …   Wikipédia en Français

  • Climate change in Australia — Climate change has become a major issue in Australia due to drastic climate events since the turn of the 21st century that have focused government and public attention.[1] Rainfall in Australia has increased slightly over the past century,… …   Wikipedia

  • Climate change and agriculture — are interrelated processes, both of which take place on a global scale.[1] Global warming is projected to have significant impacts on conditions affecting agriculture, including temperature, carbon dioxide, glacial run off, precipitation and the… …   Wikipedia

  • Climate cycle — A climate cycle is a type of recurring climate pattern that involves natural cyclic variations in the Earth s surface temperature, as indicated by temperature proxies found in glacier ice, sea bed sediment, tree ring studies or otherwise. Several …   Wikipedia

  • Oscillation de Madden-Julian — Graphique montrant la variation temporelle (ordonnée) et longitudinale (abscisse) du taux de convection par rapport à la normale ce qui indique la progression du MJO. Les zones orangées étant un surplus et celles bleues un déficit. Noter la… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”