Temperature Anomalies, Radiative Forcing and ENSO

38 Pages Posted: 10 Feb 2017

See all articles by Claudio Morana

Claudio Morana

Università di Milano Bicocca; Università degli Studi di Milano-Bicocca - Department of Economics, Management and Statistics (DEMS); Università degli Studi di Milano-Bicocca - Center for European Studies (CefES); Center for Economic Research on Pensions and Welfare Policies (CeRP); Rimini Center for Economic Analysis - Europe ETS; Rimini Center for Economic Analysis - HQ

Giacomo Sbrana

Neoma Business School

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Date Written: February 10, 2017

Abstract

The paper investigates the linkages between temperature anomalies, radiative forcing and ENSO. By means of a new flexible trend modeling approach, we uncover a nonlinear linkage between radiative forcing and global temperature anomalies. The nonlinear trend closely tracks the low frequency evolution in temperature anomalies, also accounting for the mid-end 1990s level switch, the 1998-2013 "warming hiatus" and the current steepening in trend temperatures. Radiative forcing is also found to account for trend dynamics in the Southern Oscillation Index (SOI), therefore providing support for the view that global warming might affect natural variability oscillations such as ENSO, and therefore enhance their disruptive effects. We also document the feature of time-varying volatility of temperature anomalies and SOI, which is well described by an IGARCH process. By means of a new dynamic conditional correlation model (SP-DCC), we finally document the presence of time-varying conditional correlations relating temperature anomalies across various zones and SOI. The correlation pattern is found to be consistent with the effects of ENSO events in the Tropics and their teleconnections.

Keywords: temperature anomaly, global warming, warming hiatus, radiative forcing, ENSO, El Niño, conditional heteroskedasticity, semiparametric dynamic conditional correlation model

JEL Classification: C32

Suggested Citation

Morana, Claudio and Sbrana, Giacomo, Temperature Anomalies, Radiative Forcing and ENSO (February 10, 2017). University of Milan Bicocca Department of Economics, Management and Statistics Working Paper No. 361, Available at SSRN: https://ssrn.com/abstract=2915022 or http://dx.doi.org/10.2139/ssrn.2915022

Claudio Morana (Contact Author)

Università di Milano Bicocca ( email )

Dip Economia Metodi Quantitativi Strategie Impresa
Piazza dell'Ateneno Nuovo 1
Milano, 20126
Italy
+39 0264483091 (Phone)

Università degli Studi di Milano-Bicocca - Department of Economics, Management and Statistics (DEMS) ( email )

Piazza dell'Ateneo Nuovo, 1
Milan, 20126
Italy

Università degli Studi di Milano-Bicocca - Center for European Studies (CefES) ( email )

U6 Building
Viale Piero e Alberto Pirelli, 22
Milano, 20126
Italy

Center for Economic Research on Pensions and Welfare Policies (CeRP) ( email )

Moncalieri, Turin
Italy

Rimini Center for Economic Analysis - Europe ETS ( email )

Piazza Ateneo Nuovo 1
Milan, 20126
Italy

Rimini Center for Economic Analysis - HQ ( email )

900 University Avenue
Riverside, CA 92521
United States

Giacomo Sbrana

Neoma Business School ( email )

1 Rue du Maréchal Juin
Mont Saint Aignan Cedex, 76825
France

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