How orbiting instruments monitor the Earth's changing thermal and chemical signatures
In short: From the International Space Station to specialized sensors, NASA's fleet of satellites provides a vital window into our changing planet. These instruments track everything from solar energy fluctuations to the precise moment photosynthesis begins to fail in tropical forests.
Monitoring Earth's climate requires observing complex, interconnected systems from above. The International Space Station serves as a critical platform, with its orbit passing over 90 percent of the global population. Because the station circles the planet 16 times every day, its instruments capture diverse locations at varying times of day and night, providing a continuous stream of climate-related data.
Specialized instruments like ECOSTRESS provide thermal infrared measurements of the Earth's surface. This technology is vital for studying water stress in plants; research has confirmed that photosynthesis begins to fail when temperatures reach 46.7 degrees C (114 degrees F). This is particularly concerning for tropical rainforests, where rising temperatures could push leaf heat toward this critical threshold. Meanwhile, the Total and Spectral Solar Irradiance Sensor (TSIS) maintains nearly 40 years of continuous data, measuring the Sun's total energy input and its variability across individual wavelengths.
Other sensors focus on the chemical and physical composition of our atmosphere and landscape. The GEDI instrument uses lidar to observe global forests and topography, helping estimate biomass densities across the United States and globally. Additionally, the EMIT spectrometer identifies minerals in arid dust, which influences air quality and snow melt. Crucially, EMIT data can also monitor specific sources of methane and carbon dioxide—the primary human-caused drivers of climate change—offering high-resolution monitoring that helps reduce uncertainty in the global carbon budget.
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Sources
- Summary by Intellect · source: NASA's Fleet of Satellites Help Understand Climate Change on This Week @NASA
- Also: Climate Change Research - NASA
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