{"projectrec":{"ProID":3866,"StandardTitle":"Carbonate chemistry, carbon cycle and climate change","OrigTitle":null,"Acronym":"6C","AbstractEnglish":"<b>Problems to be solved</b>\r\nThe mechanism(s) responsible for lower atmospheric pCO2 during the Last Glacial Maximum (LGM) and\r\npossible feedbacks with climate change are still unresolved. Without a properly implemented natural\r\nrelationship between the global carbon cycle and climate change, model predictions of future climate scenarios\r\ndue to anthropogenic CO2 release are doomed to fail.\r\n\r\n<b>Abstract</b>\r\nAmong the most important challenges remaining to be addressed by Quaternary paleoceanographers is the\r\nmechanism responsible for lowering pCO2 during the Last Glacial Maximum (LGM) and possible feedback\r\nmechanisms with climate change. Our main objective is to use a multi-proxy approach in order to reconstruct\r\nthe oceanic carbonate chemistry over the past 130,000 years. In combination with numerical models this will\r\nallow us to 1) distinguish the mechanisms that control the operation of the oceanic carbon cycle, 2) identify\r\nwater masses as sinks or sources of atmospheric CO2 and hence, 3) better constrain the role and the impact of\r\nthe carbon cycle on climate oscillations. Knowledge of the nature and amplitude of natural fluctuations in the\r\npast are a precondition to assess the stability of modern subsystems and their potential range of variations in\r\nthe future.\r\n\r\n<b>Objectives</b>\r\nThe overall objective of 6C is to hind-cast the processes that control the natural inter-relationship between the\r\nvariation in atmospheric pCO2 and climate change on glacial-interglacial (G-IG) time scales (by reconstructing\r\ntemporal and spatial changes in the ocean carbonate chemistry) and to quantify and predict changes in\r\natmospheric pCO2 on anthropogenic time scales (by quantifying the negative feed-back of pelagic calcifiers).","AbstractOtherLang":null,"DateLastModified":{"date":"2023-05-02 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