Warming Trend in Antarctic Bottom Water in the Vema Channel in the South Atlantic

Autor(es)

Campos, Edmo J. D. ^{[1, 2]} ; van Caspel, Mathias C. ^{[1, 3]} ; Zenk, Walter ^[4] ; Morozov, Eugene G. ^[5] ; Frey, Dmitry I. ^[5] ; Piola, Alberto R. ^{[6, 7]} ; Meinen, Christopher S. ^[8] ; Sato, Olga T. ^[1] ; Perez, Renellys C. ^[8] ; Dong, Shenfu ^[8]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Oceanog Inst, Sao Paulo - Brazil

^[2] Amer Univ Sharjah, Coll Arts & Sci, Sharjah - U Arab Emirates

^[3] Alfred Wegener Inst, Helmholtz Zent Polar & Meeresforchung, Bremerhaven - Germany

^[4] GEOMAR Helmholtz Ctr Ocean Res, Kiel - Germany

^[5] Shirshov Inst Oceanol, Moscow - Russia

^[6] Univ Buenos Aires, Buenos Aires, DF - Argentina

^[7] Serv Hidrografia Naval, Buenos Aires, DF - Argentina

^[8] NOAA, Atlant Oceanog & Meteorol Lab, Miami, FL - USA

• Tipo de documento: Artigo Científico
• Fonte: Geophysical Research Letters; v. 48, n. 19 OCT 16 2021.
• Citações Web of Science: 0

Resumo

The excess heat absorbed from the atmosphere has increased the temperature in the upper layers of the ocean (<2,000 m). In the abyss, infrequently repeated ship sections, deep Argo float measurements, and sparse moored observations have found signs of warming in the Southwest Atlantic, possibly linked to changes in the Weddell Sea. We present a new moored temperature time series sampled near the bottom in the Vema Channel, from February 2019 to August 2020. Together with historical data, the combined record confirms the warming of the abyssal waters, with an increase of 0.059 degrees C in potential temperature between January 1991 and August 2020, embedded within intense high-frequency variability. Moreover, the data suggest the possibility of an accelerated warming, with a change in the temperature trend from 0.0016 degrees C yr(-1), between the early 1990s and 2005, to 0.0026 degrees C yr(-1) afterwards. (AU)

• Processo FAPESP: 19/07833-4 - A Água Antártica de Fundo e a Célula de Revolvimento Meridional do Atlântico com base em análise de observações e modelos numéricos
• Beneficiário: Mathias Campos van Caspel
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 18/09823-3 - Estudo de impactos de mudanças na circulação do Atlântico Sul no clima com base em análise de observações e modelos numéricos
• Beneficiário: Mathias Campos van Caspel
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/09659-6 - Variabilidade interanual dos transportes meridionais através da rede transatlântica SAMOC (SAMBAR)
• Beneficiário: Edmo José Dias Campos
• Modalidade de apoio: Auxílio à Pesquisa - Temático