Reproducibility of Coral Mn/Ca‐Based Wind Reconstructions at Kiritimati Island and Butaritari Atoll

Global surface temperatures during the twentieth century are characterized by multidecadal periods of accelerated or reduced warming, which thought to be driven Pacific decadal variability, specifically changes in trade-wind strength. However, relationship between strength and global warming remains poorly constrained due scarcity instrumental wind observations. Previous work has shown that corals growing at Tarawa Atoll (1.3°N, 173°E) incorporate dissolved Mn flushed from lagoon sediments El Niño-related westerly events (WWEs), providing records both variability (on time scales). Here, we explore utility this novel coral Mn/Ca-wind proxy two nearby islands also feature west-facing lagoons. Short Mn/Ca Butaritari (3°N, Kiritimati (2°N, 157.5°W) track WWEs, albeit with some intercolony magnitude timing signal. Variability signal intensity among suggests wind-driven mixing sediment reservoir may finite and/or localized. At Kiritimati, a outside shows higher concentrations 1997/1998 Niño event, suggesting nearshore an overlooked reservoir. Taken together, these results highlight need for additional studies within across atolls hold promise recording WWEs. These suggest multiple colonies sites needed generate robust coral-based reconstructions, particularly unknown complex transport pathways.