Chelle Gentemann compared the Pacific 'Blob' with sea-surface-temperature records dating back to 1910 and found its magnitude and duration were unprecedented in that historical record.
Notes on verification
Core claim (unprecedented magnitude/duration) is corroborated by NPS and a state climate report citing peer-reviewed literature; the specific 1910 baseline detail traces back to the same National Geographic reporting lineage, not independently verified. [tier=gold indep_score=0.983 clusters=3 claim_tier=notable]
Sources
- A Striking New View of the Pacific 'Blob' (seed:science_and_space)
- https://www.nps.gov/articles/theblob.htm (corroboration)
- https://www.nationalgeographic.com.au/science/a-striking-new-view-of-the-pacific-blob.aspx (corroboration)
- https://oehha.ca.gov/sites/default/files/media/epic/downloads/03coastaloceantemps.pdf (corroboration)