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Full-Text Articles in Physical Sciences and Mathematics
Biennial And Low-Frequency Components Of El Niño/Southern Oscillation, James Michael Ryan
Biennial And Low-Frequency Components Of El Niño/Southern Oscillation, James Michael Ryan
Theses and Dissertations
El Niño/Southern Oscillation (ENSO) is a coupled oscillation of sea surface temperatures (SSTs), winds, and air pressure in the eastern and central tropical Pacific, that repeats with quasi-regularity, every 2–7 years. Although the ENSO’s spectral peak is found at a 4–7-yr period, composite El Niño events, taken as the 84 months before and after the peak of each El Niño, show that the length of each event, and often the following La Niña if there is one, usually falls within a quasi-biennial (QB) range of around 18–42 months. We argue that the biennial range of ENSO events stems from the …
Inter-Decadal Shifts In Intense Extratropical Cyclones In The Northern Hemisphere, Timm Uhlmann
Inter-Decadal Shifts In Intense Extratropical Cyclones In The Northern Hemisphere, Timm Uhlmann
Theses and Dissertations
Cyclones, both tropical and extratropical, have a large socioeconomic impact during any given year. Understanding the formation and evolution of these cyclones in the current climate therefore becomes imperative to minimize loss to property and life. Previous work by Kossin et al (2014) showed a significant poleward migration for the most intense tropical cyclones from 1982 to 2009. This sparks the interest in whether extratropical cyclones exhibit a similar trend within a changing climate. Data used stems from the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-Interim Analysis for an analogous time period from 1980-2015. Tracking and identification of cyclones …