Anti-persistence in the global temperature anomaly field

Author(s)

Carvalho, L. M. V. ; Tsonis, A. A. ; Jones, C. ; Rocha, H. R. ^[4] ; Polito, P. S.

• Document type: Journal article
• Source: Nonlinear Processes in Geophysics; v. 14, n. 6, p. 723-733, Nov. 2007.
• Field of knowledge: Physical Sciences and Mathematics - Geosciences

Abstract

In this study, low-frequency variations in temperature anomaly are investigated by mapping temperature anomaly records onto random walks. We show evidence that global overturns in trends of temperature anomalies occur on decadal time-scales as part of the natural variability of the climate system. Paleoclimatic summer records in Europe and New-Zealand provide further support for these findings as they indicate that anti-persistence of temperature anomalies on decadal time-scale have occurred in the last 226 yrs. Atmospheric processes in the subtropics and mid-latitudes of the SH and interactions with the Southern Oceans seem to play an important role to moderate global variations of temperature on decadal time-scales. (AU)

• FAPESP's process: 02/09289-9 - Biosphere-atmosphere interaction - Phase 2: cerrados and land use changes
• Grantee: Humberto Ribeiro da Rocha
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants