Browsing by Author "Burls, Natalie"

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    The role of ocean dynamics within tropical Atlantic climate variability
    (2010) Burls, Natalie; Reason, Chris; Penven, Pierrick
    Capitalising on the vast knowledge gained in the tropical Pacific, tropical Atlantic variability is viewed from an energetics perspective and contrasted against the Pacific at both seasonal and inter-annual timescales. The character of remotely forced thermocline depth variability is evaluated using available potential energy which succinctly quantifies the response of the upper equatorial ocean to large scale wind forcing. To facilitate the Atlantic-Pacific comparison, available potential energy values are derived from the temperature and salinity fields of two global ocean models.
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    Simulation of high resolution winds over the southern Benguela upwelling system with potential application to harmful algal blooms
    (2006) Burls, Natalie; Reason, Chris
    The Southern Benguela upwelling system is particularly susceptible to Harmful Algal Blooms (HABs), most of which are attributed to dinoflagellate species. Dinoflagellates are favoured by stratified conditions. Consequently, temporal or spatial variations in ocean and atmospheric conditions that favour stratification will encourage HAB development. Temporally, prolonged relaxation of the dominant equatorward wings during late summer typically results in quiscent phases in upwelling which promote stratification and bloom development.