Ocean Heat Uptake and Dynamic Sea Level: Past and Future Uncertainty

Date: 
Wednesday 27 February 2019 - 11:00 to 12:00
Location: 
NOC Southampton - Henry Charnock Lecture Theatre (Waterfront Campus).
Speaker: 
Laure Zanna (University of Oxford)

The ocean absorbs a significant portion of the anthropogenic heat released in the climate system, leading to an increase in global mean sea level. Observed and projected regional patterns of heat uptake in mid- and high-latitudes are controlled in part by changes in ocean circulation. I will introduce a new reconstruction of ocean heat content starting from 1871, and together with models and direct measurements present evidence that in the mid-latitude North Atlantic: 1) Up to half of the thermosteric sea level trend since 1955 is due to ocean circulation changes; 2) the uncertainty in dynamic sea level projections can be explained by the ocean circulation response to uncertain air-sea fluxes (rather than from ocean model uncertainty).

Seminar category: 
POC seminars
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