We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Alterações na Circulação de Hadley Regional e na Alta Subtropical do Atlântico Sul em um Cenário de Aquecimento Global.
- Authors
de Moura Joia Gomes, Lorena; Freitas, Ana Carolina Vasques
- Abstract
The Hadley Circulation (HC) is of extreme importance to the climate system, as it acts as one of the fundamental regulators of the terrestrial energy balance. The subsiding HC movement in winter may explain the origin of subtropical highs, which are semi-permanent high-pressure systems. Studies have pointed out changes in the position and intensity of the subtropical highs, as well as intensity and width of HC. Therefore, this study sought to understand if there is a relationship between the changes in the HC over the Atlantic Ocean (HCAO) and in the South Atlantic Subtropical High (SASH). The RegCM4 Regional Climate Model and ERA-Interim reanalysis data were used. The results showed changes in CHOA and in ASAS during 1979-2015 period, with a significant trend of intensification and displacement towards the South Pole boundary of CHOA and a significant trend of ASAS intensification. The regional model reproduced the observed changes in circulation. Cases of intensification (weakening) of CHOA may be related to El Niño (La Niña) events. On the other hand, the intensity of ASAS and the descending branch of CHOA are associated to anomalies in the Sea Surface Temperature (SST) in the tropical region of the West Pacific and in the subtropical region of the West Atlantic, near the southeast coast of South America.
- Subjects
SOUTH Pole; SOUTH America; OCEAN temperature; LA Nina; ATMOSPHERIC models; OCEAN; CLIMATOLOGY; SOUTHERN oscillation
- Publication
Anuario do Instituto de Geociencias, 2020, Vol 43, Issue 3, p227
- ISSN
0101-9759
- Publication type
Article
- DOI
10.11137/2020_3_227_239