CIRENE 2007
Type | Oceanographic cruise |
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Set | This cruise is part of the set CIRENE |
Ship | Le Suroît |
Ship owner | Ifremer |
Dates | 05/01/2007 - 21/02/2007 |
Chief scientist(s) | VIALARD Jérôme |
LABORATOIRE D'OCÉANOGRAPHIE ET DU CLIMAT : EXPÉRIMENTATIONS ET APPROCHES NUMÉRIQUES - UMR 7159 Institut Pierre Simon Laplace Boîte 100 4 place Jussieu 75005 Paris +33 (1) 44 27 32 48 |
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DOI | 10.17600/7020010 |
Objective | Intra-seasonal atmospheric variability on the Indian Ocean conditions monsoon activity and may contribute to the development of an El Niño phenomenon. Recent studies based on satellite data indicate that it is associated with great variability of ocean surface temperatures in winter in the area around 55°E-80°E, 10°S-3°S (with variations of several degrees noted over 10-20 days). Very little study has been devoted to the processes behind this variability and its impact on atmosphere variability trends. There are no in situ measurements available for it, although they will be needed in order to confirm scenarios of mechanisms based on simulations. The CIRENE cruise mainly aims to better understand the ocean-atmosphere coupling on the intra-seasonal scale and to explain 1) the mechanisms underlying surface temperature variability and 2) its possible influence on the atmospheric column. This cruise took place in the 55°E-80°E, 10°S-3°S region. It was coordinated to coincide with the Vasco intensive observation period (deploying aeroclippers and pressurized balloons from the Seychelles). Physical ocean measurements of interface and atmospheric fluxes were taken during CIRENE. Detailed attention was also given to measuring the diurnal cycles since recent studies have suggested that it may play an important role on the intra-seasonal scale. Biogeochemical measurements (nutrients, pigments) were also taken to provide supplementary information about physical phenomena in play. |