The Pacific Decadal Oscillation modulates global temperature trends since the mid-18th century
- 1Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- 2Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
- 3Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- 4College of Ocean and Earth Sciences, Center for Marine Meteorology and Climate Change, Xiamen University, Xiamen, China
- 5Xi’an Institute for Innovative Earth Environment Research, Xi'an, China
The Pacific Decadal Oscillation (PDO) plays a crucial role in global decadal climate variability. However, large discrepancies persist in the determination of pre-industrial PDO variability derived from terrestrial proxy records. Here we reconstruct the PDO variability for the period 1746–2003 using a network of annually resolved marine proxy records from the extratropical North Pacific. Our PDO reconstruction (PDOrec) provides evidences for the persistent decadal variability and tropical-extratropical interactions over the North Pacific. Superposed epoch analysis does not detect a significant response of PDOrec to major volcanic eruptions, underscoring the dominant role of internal variability. Decadal changes in global temperature trends were found to correspond to PDOrec for the period 1746–2003, indicating that the decadal changes in global temperature trends do not arise solely from external forcing, and may be instead modulated by internal variability.
How to cite: Han, T., Xie, Z., Wang, J., Hu, J., Wang, Z., and Yan, H.: The Pacific Decadal Oscillation modulates global temperature trends since the mid-18th century, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-5249, https://doi.org/10.5194/egusphere-egu24-5249, 2024.
