The Pacific Ocean was simply as heat 600 years in the past – what’s happening with that?

By NOT MANY PEOPLE KNOW THAT

By Paul Homewood

An international team of climate scientists has used 627-year-old coral records from Fiji to gain unprecedented insights into ocean temperatures and climate variability across the Pacific since 1370.

The new coral records show that local ocean temperatures were warm between 1380 and 1553, comparable to the late 20th and early 21st centuries. However, when combined with other coral records, the Pacific warming observed since 1920, largely due to human-caused emissions, represents a significant departure from the natural variability recorded in previous centuries.

https://phys.org/news/2024-08-fijian-coral-reveals-year-pacific.html

We can safely ignore the usual contemptuous claim that the study proves “climate change”. As always, this study would neither have been funded nor published if it had not mentioned climate change. Hence the authors' appeal:

The graphics show that there is no evidence to support their attribution:

(D) Annually averaged Sr/Ca SSTs for the Fiji coral core F14 (red) compared to the Fiji composite
Coral records from records 1F and AB (23) (green) over their combined period from 1781 to 1997. (E) Annual Fiji coral records (red) combining the records in
(D) compared to the Ocean2K SST anomaly reconstruction for the western Pacific (24) (blue) and the SST from PHYDA near Fiji (17°S, 117°E) (21) (green). Also shown
are the latest SST data for Fiji from ERSSTv5 (1998 to 2021), shown in (E) (black). SST shown as anomalies compared to the period 1883 to 1996. Note
that the 1F and AB (23) records from Fiji are also included in the PHYDA and O2KWP reconstructions. Triangles in (D) and (E) indicate the timing of large volcanic events (m2 values) (Fig. 2) (22) that are typically associated with a cooling response. Longer warm (cold) periods are highlighted in (D) and (E) by red (blue) bars based on the inflection point
The analyses of the Fiji composite shown in (E) are indicated by dark red vertical lines; dark red horizontal lines indicate the mean for each period.

Not only do we see the warmer period before the onset of the LIA, we can also clearly see that sea surface temperatures (SSTs) began to rise again in the early 19th century, long before any possible human-caused effect.

It is clear that natural variability dominates the entire period, but this is hardly surprising considering that a warmer atmosphere cannot significantly increase ocean temperatures.

We should also ignore the black line showing the current SSTs – merging data in this way is strictly prohibited in any statistical analysis.

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