Understanding Drivers and Trends of Habitability in Kiribati from a Systems Perspective

Area of Science:

• Climate Science
• Environmental Science
• Sociology

Background:

• Pacific atolls are highly vulnerable to climate change due to low elevations and scarce resources.
• Existing research often oversimplifies habitability by focusing solely on hazard exposure, leading to assumptions of inevitable mass migration.

Purpose of the Study:

• To simulate habitability trends in Kiribati over the next century using a multidimensional, locally grounded conceptualization.
• To operationalize habitability by incorporating interdependent factors like resource availability, livelihood opportunities, and population dynamics.

Main Methods:

• Utilized system dynamics modeling to simulate future habitability trends.
• Integrated local knowledge to define a multidimensional conceptualization of habitability.
• Analyzed interdependent factors influencing habitability, including climate change impacts, resource availability, and population dynamics.

Main Results:

• Water insecurity emerges as a primary driver of habitability loss, exacerbated by extreme climate scenarios.
• Population pressures intensify resource constraints.
• Significant internal migration is projected, with a preference for national urban centers over international relocation.

Conclusions:

• A holistic, systems-based approach is crucial for understanding habitability in vulnerable island nations.
• Climate adaptation strategies must address water security and population pressures.
• Insights into changing habitability drivers can inform targeted and timely adaptation measures.