An international team of climate scientists have used a 627-year coral record from Fiji to reveal unprecedented insights into ocean temperatures and climate variability across the Pacific Ocean since 1370.
The new coral record shows that the local ocean temperature was warm between 1380 and 1553, comparable to the late 20th and early 21st centuries.
Plainly natural variability dominates the whole period, something which is hardly surprising, given that a warmer atmosphere cannot significantly increase ocean temperatures.
Extended warm (cold) periods highlighted in (D) and (E) by red (blue) bars based on the change point analysis for the Fiji composite shown in (E) are indicated by dark red vertical lines; dark red horizontal lines indicate the mean for each period.
As ever, this study would not have been funded or published if it had not mentioned climate change.
However, when combined with other coral records, the Pacific-wide warming observed since 1920, largely attributed to human-derived emissions, marks a significant departure from the natural variability recorded in earlier centuries.
(E) Annual Fiji composite coral record (red) combining the records shown in (D) compared to the Ocean2K SST anomaly reconstruction for the western Pacific (24) (blue) and the SST from the PHYDA close to Fiji (17°S, 117°E) (21) (green).
https://wattsupwiththat.com/2024/08/20/the-pacific-ocean-was-as-warm-600-years-ago/
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