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| Hummels, Rebecca; Dengler, Marcus; Brandt, Peter; Schlundt, Michael. |
| Sea surface temperatures (SSTs) in the eastern tropical Atlantic are crucial for climate variability within the tropical belt. Despite this importance, state-of-the-art climate models show a large SST warm bias in this region. Knowledge about the seasonal mixed layer (ML) heat budget is a prerequisite for understanding SST mean state and its variability. Within this study all contributions to the seasonal ML heat budget are estimated at four locations within the Atlantic cold tongue (ACT) that are representative for the western (0 degrees N, 23 degrees W), central (0 degrees N, 10 degrees W) and eastern (0 degrees N, 0 degrees E) equatorial as well as the southern (10 degrees S, 10 degrees W) ACT. To estimate the contribution of the diapycnal heat flux due... |
| Tipo: Text |
Palavras-chave: Mixed layer heat budget; Atlantic Cold Tongue region; Diapycnal heat flux; Microstructure observations. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00272/38357/36660.pdf |
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| Bourlès, Bernard; Araujo, Moacyr; Mcphaden, Michael J.; Brandt, Peter; Foltz, Gregory R.; Lumpkin, Rick; Giordani, Hervé; Hernandez, Fabrice; Lefèvre, Nathalie; Nobre, Paulo; Campos, Edmo; Saravanan, Ramalingam; Trotte‐duhà, Janice; Dengler, Marcus; Hahn, Johannes; Hummels, Rebecca; Lübbecke, Joke F.; Rouault, Mathieu; Cotrim, Leticia; Sutton, Adrienne; Jochum, Markus; Perez, Renellys C. |
| PIRATA is a multinational program initiated in 1997 in the tropical Atlantic to improve our understanding and ability to predict ocean‐atmosphere variability. PIRATA consists of a network of moored buoys providing meteorological and oceanographic data transmitted in real‐time to address fundamental scientific questions as well as societal needs. The network is maintained through dedicated yearly cruises, which allow for extensive complementary shipboard measurements and provide platforms for deployment of other components of the Tropical Atlantic Observing System. This paper describes network enhancements, scientific accomplishments and successes obtained from the last 10 years of observations, as well as additional results enabled by cooperation with... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00485/59680/62752.pdf |
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| Fischer, T.; Banyte, D.; Brandt, P.; Dengler, Marcus; Krahmann, Gerd; Tanhua, Toste; Visbeck, Martin. |
| he replenishment of consumed oxygen in the open ocean oxygen minimum zone (OMZ) off West Africa in the tropical North Atlantic Ocean is studied, with a focus on oxygen transport across density surfaces (diapycnal flux). The latter is obtained from a large observational set of oxygen profiles and diapycnal mixing data from years 2008 to 2010. Diapycnal mixing is inferred from different sources: a large scale tracer release experiment, microstructure profiles, and shipboard acoustic current measurements plus density profiles. The average diapycnal diffusivity in the study area is 1 × 10−5 m2 s−1. No significant vertical gradient of average diapycnal diffusivities exists in the depth interval from 150 to 500 m. The diapycnal flux is found to contribute... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00180/29099/27511.pdf |
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