Challenges to natural and human communities from surprising ocean temperatures

Area of Science:

• Ecology
• Climate Science
• Environmental Science

Background:

• Ecosystems and human societies historically adapt based on past environmental conditions.
• Anthropogenic climate change introduces strong trends and increases the frequency of unexpected environmental conditions, or 'surprises'.
• Ocean temperatures are exhibiting trends that exceed historical variability.

Purpose of the Study:

• To quantify the increasing frequency of surprising ocean temperatures.
• To model the impact of these surprises on natural adaptation strategies.
• To project the effects of warming rates on species composition, productivity, and diversity.

Main Methods:

• Analysis of historical ocean temperature data to identify trends and deviations.
• Development of a simple model to simulate human and natural adaptation responses to environmental surprises.
• Ecological modeling to assess shifts in species composition under projected warming rates.

Main Results:

• The frequency of surprising ocean temperatures has increased at a rate exceeding recent temperature trends.
• Environmental surprises pose significant challenges to adaptation strategies reliant on historical experience.
• Projected warming rates are likely to favor generalist species, leading to decreased ecosystem productivity and biodiversity.

Conclusions:

• Current adaptation strategies may become insufficient due to accelerating climate change and increasing environmental surprises.
• A paradigm shift towards anticipating and adapting to continuous trends, rather than relying on historical stability, is increasingly necessary.
• Ecosystems face significant restructuring, with potential losses in productivity and diversity under continued warming.