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Abstract Interdecadal variability of the Atlantic thermohaline circulation (THC) is studied in the third version of the Hadley Centre global coupled atmosphere–ocean sea-ice general circulation model (HadCM3). A diagnostic approach is used to elucidate the mechanism that governs the variability and its impacts on climate. An irregular and heavily damped THC oscillation with a period around 25 yr is identified. The oscillation appears to be forced by the atmosphere but the ocean is responsible for setting the time scale. Following a minimum in the THC, the mechanism for phase reversal involves the accumulation of cold water in the subpolar gyre, leading to an acceleration of the gyre circulation and the North Atlantic Current. This acceleration increases the transport of saline waters into the regions of active deep convection, raising the upper-ocean density and leading, after adjustment, to acceleration of the THC. The atmosphere stimulates this THC variability in two ways: 1) by forcing the subpolar gyre 📍 Venue: George's Majestic Lounge
🏠 Address: 519 West Dickson Street
🗺️ Extended Address: Fayetteville, AR 72701
🌆 City: Fayetteville
📍 Location: 36.0661, -94.1665Error occurred: DateTime::__construct(): Failed to parse time string (George's Majestic Lounge) at position 0 (G): The timezone could not be found in the database
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Event Venue & Nearby Stays
George's Majestic Lounge, 519 West Dickson Street, Fayetteville, AR 72701, US, United States
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