Why is the southern oscillation index important

On average, persistent convection and low surface pressure associated with rising branches of the Walker Circulation are found over the Maritime continent, northern South America, and eastern Africa. Subsidence sinking air and high pressure are found over the central tropical Pacific and to a lesser extent over the Middle East and Southwest Asia. The already-low surface pressure over northern Australia and the Maritime Continent drops even lower.

There's more convection, rainfall, and lower-than-average surface pressure in the central Pacific, and less convection, clearer skies, and higher-than-average surface pressure in the western Pacific.

These pressure patterns have been observed at weather stations in Darwin, Australia, and Tahiti going back many decades. Journal of Climate, 11, — Fontana, D. Modelo de estimativa de rendimento de soja no Estado do Rio Grande do Sul.

Grimm, A. Journal of Climatology, 11, — Hoogenboom, G. Contribution of agrometeorology to the simulation of crop production and its applications. Agricultural and Forest Meteorology, , — Kaiano, M. International Journal of Climatology, 27, — Kayano, M.

Relations of South American summer rainfall interannual variations with the Pacific Decadal Oscillation. Lazzari, M. Lizumi, T. Nature Comunications, 5. To calculate the index, you need to have the information and use a specific formula. During the s, two important meteorologists identified specific air pressure fluctuations between the East Indian Ocean and the South Pacific Ocean.

Consequently, that affects many parts of the tropics and subtropics. When the phenomenon occurs, the two periods often last a few months. Nonetheless, the intensity varies a lot depending on the year of the happening. So far, they remain a wonder to many meteorologists and other experts. They are natural meteorological happenings that the world cannot avoid. Share the guide with your friends and family so none of you misses all the valuable information about the Southern Oscillation Index!

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You can also search for this author in PubMed Google Scholar. Correspondence to Scott B. Reprints and Permissions. Power, S. The impact of global warming on the Southern Oscillation Index. Clim Dyn 37, — Download citation. Received : 11 February Accepted : 23 November