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Author

Gregory J. Hakim

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Preprint Aug 2026

Coupled multiscale paleoclimate reconstruction with four-dimensional variational data assimilation

Paleoclimate archives extend climate knowledge beyond the instrumental era, registering different seasons, variables, time averages, and memory lengths. A longstanding problem is to integrate these heterogeneous sources of information within a unified methodology. Here we present a new data-assimilation framework, Last...

Zilu Meng, Gregory J. Hakim, J. Emile-Geay et al. · 0 citations
Open access Oct 2025

Top-of-atmosphere radiation over the last millennium reconstructed from proxies

Earth’s energy imbalance at the top of the atmosphere is a key climate system metric, but its natural variability is poorly constrained by the short observational record and large uncertainty in coupled climate models. While existing ocean heat content reconstructions offer a longer perspective, they cannot separate...

Dominik Stiller, Gregory J. Hakim · 0 citations
Open access Jul 2026

Top-of-atmosphere radiation over the last millennium reconstructed from proxies

Earth’s energy imbalance at the top of the atmosphere is a key climate system metric, but its natural variability is poorly constrained by the short observational record and large uncertainty in coupled climate models. While existing ocean heat content reconstructions offer a longer perspective, they cannot separate...

Dominik Stiller, Gregory J. Hakim · 0 citations

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