Yiğit Öner Altıntaş
A5077547885- Impact of Light on Environment and Health
- Circadian rhythm and melatonin
- Human Mobility and Location-Based Analysis
- Remote Sensing and LiDAR Applications
- Air Quality Monitoring and Forecasting
- Remote Sensing in Agriculture
GFZ Helmholtz Centre for Geosciences
2023-2024
The artificial glow of the night sky is a form light pollution; its global change over time not well known. Developments in lighting technology complicate any measurement because changes practice and emission spectra. We investigated brightness from 2011 to 2022 using 51,351 citizen scientist observations naked-eye stellar visibility. number visible stars decreased by an amount that can be explained increase 7 10% per year human band. This faster than emissions indicated satellite...
The relationship between satellite based measurements of city radiance at night and the numbers types physical lights installed on ground is not well understood. Here we present “Nachtlichter app”, which was developed to enable citizen scientists classify count light sources along street segments over large spatial scales. project app were co-designed: played key roles in development, testing, recruitment, as analysis data. In addition describing itself data format, provide a general...
<title>Abstract</title> The image of Earth at Night from space has become iconic, but we are still in the dark when it comes to question what extent different light source types contribute city emissions. Our team citizen scientists used Nachtlichter app count and classify 234,044 sources over a total area 22 km2 during 2021. We find that space-based radiance observation 1 nW/cm2sr 500-900 nm range corresponds 219 lights/km2 on ground midnight. This suggests 78.0±1.6 million individual...