Reis, Pedro Amaral and Aquino, Francisco Eliseu and Schossler, Venisse and Bernardo, Ronaldo Torma and Simões, Jefferson Cardia (2020) Tropical–Antarctic connections of an explosive cyclone in southern Brazil: rainfall stable isotope ratios and atmospheric analysis. Advances in Polar Science, 31 (2). pp. 103-111.
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Abstract
This study analyzes the stable isotopic ratio (δ18O) and the synoptic characteristics of a precipitation event that occurred in the southernmost state of Brazil, Rio Grande do Sul, a region sensitive to explosive cyclogenesis in years with enhanced tropic-pole interactions. The main objective was to evaluate the influence of tropical and Antarctic climate systems on the event. Cavity ring-down spectroscopy was used for the water isotopic analysis, and NCEP CFSv2 data were employed for the synoptic analysis of rainfall over a 48-h period. An Amazonian isotopic signature on precipitated water was identified. A strong, low-level meridional flow from the Amazon Basin, combined with the development of a frontal system, resulted in intense cyclogenesis that generated an explosive cyclone.
| Item Type: | Article |
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| Related URLs: | |
| Uncontrolled Keywords: | Antarctica, Amazon, South American low-level jet (SALLJ), cyclogenesis |
| Subjects: | Natural Environment > Atmosphere |
| Organizations: | Unspecified |
| Date Deposited: | 13 Nov 2023 13:51 |
| URI: | http://library.arcticportal.org/id/eprint/2719 |
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