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Li, T., Wang, Z., Kyba, C.C.M. et al. Satellite imagery reveals increasing volatility in human night-time activity. Nature

Objective:

  • Quantify the timing, intensity, type, and direction of ALAN changes for every 15-arc-second pixel across the primary inhabited landmasses of Earth

Case:

  • Global

Methodology:

  • VZA-COLD algorithm

Data Source

  • 1.16 million daily NASA Black Marble NTL images

Findings:

  • Nightlights of Earth are dynamic, characterized by frequent and coexisting brightening and dimming

Coding Reference: