Ideas and perspectives: Southwestern tropical Atlantic coral growth response to atmospheric circulation changes induced by ozone depletion in Antarctica
- 1LARAMG/IBRAG/Uerj. Pav. HLC, Subsolo, Rua São Francisco Xavier 524, Maracanã – Rio de Janeiro, 20550-013, Brazil
- 2Universidade de São Paulo – USP/IO/Departamento de Oceanografia Física, Praça do Oceanográfico 191, 05508-120 São Paulo, SP, Brazil
- 3Departamento de Geoquímica, Instituto de Química – UFF, Outeiro de São João Batista s/n, Centro – Niterói, 24020-007, Brazil
- 4IRD-Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-MNHN, LOCEAN Laboratory. IRD France-Nord, 32, avenue Henri Varagnat, 93143 Bondy, France
- 5Université de Bordeaux, UMR CNRS 5805 EPOC, Allée Geoffroy St Hilaire, 33615 Pessac Cedex, France
- 6High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Roosevelt Rd., Taipei 10617, Taiwan ROC
Abstract. Recent Southern Hemisphere (SH) atmospheric circulation, predominantly driven by stratospheric ozone depletion over Antarctica, has caused changes in climate across the extratropics. Here, we present evidence that the Brazilian coast (southwestern Atlantic) may have been impacted from both wind and sea-surface temperature changes derived from this process. Skeleton analysis of massive coral species living in shallow waters off Brazil are very sensitive to air–sea interactions, and seem to record this impact. Growth rates of Brazilian corals show a trend reversal that fits the ozone depletion evolution, confirming that ozone impacts are far reaching and potentially affect coastal ecosystems in tropical environments.