Dynamical reconstruction of Southern Ocean and Antarctic climate variability since 1700.

ABSTRACT: Understanding long-term climate variability in the high latitudes of the Southern Hemisphere is critical due to the key role of the Southern Ocean in the global climate system. However, sparse observations (in space and time) coupled with strong internal variability limit our ability to interpret the origin of recent changes, and their longer-term context. Here we present a dynamically consistent reconstruction of the Antarctic atmosphere and Southern Ocean from 1700 to 2023. We first use data assimilation (DA)-based Antarctic atmospheric reanalyses that combine instrumental observations (1958-2023) and paleoclimate proxies (1700-2000) with Earth System Models to reconstruct key surface climate fields. We then drive a global ocean-sea-ice model with this atmospheric reanalysis to simulate

SUBMITTER: Dalaiden Q 

PROVIDER: S-EPMC12474946 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature