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Zhengyu Liu

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Open access Sep 2026

An Ensemble Kalman Smoother for Online Paleoclimate Data Assimilation

An integrated hybrid ensemble Kalman smoother (IHEnKS) is proposed to optimally utilize proxy data from the past to the future for paleoclimate data assimilation (PDA). As an extension of the integrated hybrid ensemble Kalman filter, IHEnKS assimilates future proxies through cross‐time error covariances, which are es...

Hao-Hao Sun, Li-Li Lei, Zhe-Min Tan et al. · 0 citations
Open access Aug 2026

Reconstruction and attribution of Late-Pleistocene changes in the Earth’s energy imbalance

The Earth’s energy imbalance (EEI) that develops at the top of the atmosphere is accommodated by gains or losses of energy in Earth’s heat reservoirs, leading to temperature and sea level change. The global ocean has stored about 90% of the EEI from anthropogenic forcing, but the attribution of past changes of EEI rema...

Sara C Sanchez, P. U. Clark, Chenyu Zhu et al. · 0 citations
Jul 2026

Assessing Ocean Forcing on Sea Surface Temperature Variability from Surface Heat Budget

This paper compares three methods for quantifying stochastic ocean forcing to low frequency sea surface temperature (SST) variability from the surface heat budget in the framework of a simple stochastic climate model, especially in the case of red noise ocean forcing. The three methods are: PT21 (Patrizio and Thompso...

Zhengyu Liu, Peng Gu · 0 citations

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