Abstract
Abstract This study focuses on the quantification and evaluation of the effects of ENSO (El Niño Southern Oscillation) warm phases, using a composite of five intense El Niño episodes between 1979 – 2011 on the Energetic Lorenz Cycle for four distinct regions around the globe: 80° S – 5° N (region 1), 50° S – 5° N (region 2), 30° S – 5° N (region 3), and 30° S – 30° N (region 4), using Data from NCEP reanalysis-II. Briefly, the results showed that zonal terms of potential energy and kinetic energy were intensified, except for region 1, where zonal kinetic energy weakened. Through the analysis of the period in which higher energy production is observed, a strong communication between the available zonal potential and the zonal kinetic energy reservoirs can be identified. This communication weakened the modes linked to eddies of potential energy and kinetic energy, as well as in the other two baroclinic conversions terms. Furthermore, the results indicate that for all the regions, the system itself works to regain its stable condition.
Highlights
Atmospheric energetics analysis has had a long history since Lorenz (1955) formulated the concept of the available potential energy and its relationship with the atmospheric general circulation
Sátyro and Veiga and available potential energy (AE) values have supported the claim that the intense warm ENSO of 1982 and/or the El Chichon eruption may have affected the circulation in the Intertropical Convergence Zone (ITCZ) region
We present a broad energetic analysis relative to strong ENSO conditions for four specific domains around the globe
Summary
Atmospheric energetics analysis has had a long history since Lorenz (1955) formulated the concept of the available potential energy and its relationship with the atmospheric general circulation. Da Silva and Satyamurty, in 2013, studied the Lorenz energy cycle in the Intertropical Convergence Zone (ITCZ) in the South American sector of the Atlantic They observed a strong annual cycle in all the components of energy with maximum occurring in the summer. Deckers and von Storch (2010, 2011 and 2012) conduced studies about the dynamics of the atmospheric response relative to an increase in the CO2 concentration They found a dual role of the heating pattern characterized by a strong heating in the tropical upper troposphere and in the lower levels of high latitudes, associated with the branch zonal available potential energy, an increase of the average potential energy in the upper troposphere and a decrease heating is mainly due to the static stability parameter
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
