Passage Summary: Pacific waters have warmed lately, and while some blame human pollution, a climatologist points out that natural cycles also cause long-term temperature shifts, making the pollution claim questionable.

Conclusion: The claim that recent warming in Pacific coastal waters is a result of human-caused global warming is not sufficiently supported.

Reasoning: Natural cycles of ocean temperature changes can last for 60 years or more, which could account for the 15-year warming trend observed.

Analysis: This is an 'Identify the Conclusion' task, so we must isolate the author's main point. The word 'However' signals a shift away from the 'some scientists' view to the climatologist's own stance. The phrase 'this conclusion is far from justified' is the core claim being defended. The final sentence provides the evidence regarding natural cycles to support that skepticism.