The Pacific 'Blob' marine heatwave persisted from late 2013 through most of 2015 and into 2016.
Notes on verification
Timeline corroborated by NASA, Oregon Encyclopedia, Wikipedia, and peer-reviewed studies; minor variance in exact start/end dates across sources but core claim well supported. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.925 clusters=2 claim_tier=notable]
Sources
- A Striking New View of the Pacific 'Blob' (seed:science_and_space)
- https://www.oregonencyclopedia.org/articles/the-blob-of-2015/ (corroboration)
- https://www.earthdata.nasa.gov/news/feature-articles/blob (corroboration)