Data from "Robust ENSO Teleconnection to North Pacific and Southwest Coast of North America in the Late Cretaceous Greenhouse" ...

• Main Authors: Qin, Jianming, Gao, Yuan, Du, Xiaojing, Zhang, Jian, Cai, Wenju, Hu, Yongyun, Li, Xiang, Wang, Chengshan
• Format: Dataset
• Language: unknown
• Published: Zenodo 2024
• Subjects: aleutian low
• Online Access: https://dx.doi.org/10.5281/zenodo.12530622; https://zenodo.org/doi/10.5281/zenodo.12530622

The El Niño-Southern Oscillation (ENSO) exerts impacts on global climate through atmosphere teleconnections. Geological records from deep-time greenhouse periods suggest possible existence of past ENSO teleconnections, but the associated mechanisms for deep-time ENSO teleconnections remain unknown. Here, we investigate the teleconnection between ENSO and the southwest coast of North America (SWNA) during the Late Cretaceous based on paleoclimate simulations and sedimentary archives. We find that under the forcing from high pCO2 levels and absence of the Bering Seaway in Late Cretaceous, ENSO teleconnection to SWNA was primarily conducted by Subtropical High, rather than Aleutian Low. Consequently, the Westerlies, sensitive to changes in Subtropical High, shifted longitudinally, leading to alterations in moisture transportation to SWNA. Our study suggests that absence of Bering Seaway in the Late Cretaceous, resulted in pressure anomalies that partially inhibited the ENSO-SWNA teleconnection, but higher pCO2 ...