Key facts
- A new method using satellite imagery tracks the "urban pulse" of cities in near real-time.
- The study analyzed Dubai, Lagos, Mexico City, Mumbai, Seattle, and Shenzhen.
- Urbanization is characterized by abrupt, intense bursts, not smooth, steady growth.
- The "urban pulse" can detect early warning signs of economic stress or stagnation.
- The technique can help urban planners intervene early to prevent infrastructure collapse or economic decay.
Researchers have developed a novel method utilizing high-frequency satellite imagery to monitor the dynamic changes within six major global cities: Dubai, Lagos, Mexico City, Mumbai, Seattle, and Shenzhen. This approach, dubbed the "urban pulse," offers a more nuanced understanding of urbanization than traditional, infrequent data sources like yearly censuses or decade-spanning maps.
The study, published in the journal Proceedings of the National Academy of Sciences, found that urbanization is not a smooth, steady process but rather occurs in "spiky," cyclical, or asynchronous bursts. This "urban pulse" concept, inspired by human vital signs, can detect early signs of economic stress or stagnation before they escalate into crises.