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Using Generative Art to Convey Past and Future Climate Transitions
Published on: March 31, 2023
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Climate migration amplifies demographic change and population aging.
Mathew E Hauer1,2, Sunshine A Jacobs1,2, Scott A Kulp3
1Department of Sociology, Florida State University, Tallahassee, FL 32306.
Summary
Climate migration, driven by sea-level rise, could significantly amplify population changes and accelerate aging in coastal areas. This study models these demographic impacts, projecting substantial shifts in the US population distribution by 2100.
Area of Science:
- Environmental science
- Demography
- Climate change studies
Background:
- Scientific literature first warned of climate migration in the 1970s due to ice sheet disintegration and coastal city impacts.
- Previous models of climate migration often excluded demographic processes, potentially underestimating migration amplification and population aging effects.
Purpose of the Study:
- To investigate climate migration under sea-level rise (SLR) and its demographic amplification.
- To examine the impact of climate migration on population aging in origin areas.
- To project US population distribution changes in counties due to SLR.
Main Methods:
- Combined matrix population models, flood hazard models, and a migration model based on 40 years of US environmental migration data.
- Projected US population distribution across counties under various Representative Concentration Pathway-Shared Socioeconomic Pathway (RCP-SSP) scenarios.
- Analyzed the relationship between population loss due to climate migration and median age increase.
Main Results:
- Demographic amplification of SLR is projected to increase migration numbers significantly, ranging from 5.3 to 18 times the baseline estimates (0.4-10 million migrants).
- Coastal areas are projected to experience significant population aging as younger populations migrate away, leaving older residents behind.
- In highly impacted coastal counties, median age could increase by over 10 years as the percentage of the population lost to climate migration rises.
Conclusions:
- Climate migration, specifically due to SLR, will likely cause substantial demographic amplification and accelerate population aging in vulnerable coastal regions.
- The developed modeling approach provides a framework for investigating additional or multiple climate hazards on population distribution.
- Understanding these demographic shifts is crucial for effective climate adaptation and policy planning.
Keywords:
climate migrationdemographic amplificationmultiregional population projectionspopulation agingsea-level riseMore Related Videos
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