Relationship between the Hadley Circulation and the stationary Rossby waves in a global warming scenario in the Southern hemisphere

• Grant number: 12/14231-1
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: February 18, 2013
• End date: February 17, 2014
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Meteorology
• Principal Investigator: Tercio Ambrizzi
• Grantee: Ana Carolina Vasques Freitas
• Supervisor: Jorgen Frederiksen
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: CSIRO Marine and Atmospheric Research, Australia
• Associated to the scholarship: 11/13669-0 - Relationship between the Hadley circulation and the stationary Rossby waves in a global warming scenario in South America, BP.PD

Abstract

Through anomalous upper tropospheric divergence, changes in the Hadley Circulation (HC) are connected to alterations in the generation of Rossby waves that propagate into the extra-tropics. Many studies identified that a robust HC response to an increase in the anthropogenic greenhouse gas emissions is a weakening and a poleward expansion of this circulation. Changes in the location, intensity or seasonality of major climatological features of the general circulation, such as HC or Rossby waves, can have important implications for regional climates by modifying patterns of temperature and precipitation. Hence, it is important to study how the changes in the tropical circulation, in particular the HC, impact the extra-tropical planetary waves and its energy propagation, especially in the context of an increase in the anthropogenic greenhouse gas emissions, once it could be linked to significant regional climate change. The objective of the present proposal is to investigate how changes in the HC impact the stationary Rossby waves energy propagation in the Southern Hemisphere (SH) extra-tropics using the Commonwealth Scientific and Industrial Research Organization (CSIRO) Mark-3L model. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FREITAS, ANA C. V.; FREDERIKSEN, JORGEN S.; O'KANE, TERENCE J.; AMBRIZZI, TERCIO. Simulated austral winter response of the Hadley circulation and stationary Rossby wave propagation to a warming climate. Climate Dynamics, v. 49, n. 1-2, p. 521-545, JUL 2017. (12/14231-1, 08/58101-9)

FREITAS, ANA C. V.; FREDERIKSEN, JORGEN S.; WHELAN, JENNIFER; O'KANE, TERENCE J.; AMBRIZZI, TERCIO. Observed and simulated inter-decadal changes in the structure of Southern Hemisphere large-scale circulation. Climate Dynamics, v. 45, n. 11-12, p. 2993-3017, DEC 2015. (12/14231-1, 08/58101-9)