Pervasive coupling between interglacial CO2 concentrations, temperature, and sea level

There is a pressing need to better constrain the impact of anthropogenic climate forcing on global sea level [IPCC, 2007]. We push the benthic isotope record to derive sea level during all interglacial sea-level highstand periods of the last 650 000 years. We demonstrate that a pervasive coupling exists between sea level, atmospheric CO2 concentrations, and Antarctic temperature. This relationship is best explained in terms of a combination of insolation variation and greenhouse-gas concentrations.