Unleashing the power of satellites - with the National Physical Laboratory

The Royal Institution2 minutes read

In the late 19th century, electrical substitution radiometers revolutionized optical radiation measurements, leading to more precise data. The development of advanced instruments like the MPL is crucial for monitoring climate change and understanding Earth's complex systems.

Insights

  • The ultimate goal of the MPL instrument is to aid in climate change research by providing precise measurements of radiation imbalance and energy absorption, crucial for understanding the Earth's energy systems and the impact of climate change.
  • The TRUTHS mission, led by the UK and implemented by the European Space Agency, aims to establish a benchmark reference in space for climate emergency responses, emphasizing the importance of global collaboration and trustworthy data to drive effective climate action in the next few decades.

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Recent questions

  • What is the significance of the instrument designed in the late '70s and early '80s?

    The instrument designed in the late '70s and early '80s was optimized for optical radiation measurement, improving performance by a factor of 100. This advancement was crucial for measuring the energy imbalance of the earth, a key factor in climate change research. It allowed for precise radiation absorption measurements, enhancing the understanding of how Earth's energy balance is affected by various factors like greenhouse gases and solar radiation. Additionally, the instrument's design enabled it to be launched into space for climate change measurements, showcasing its importance in expanding our knowledge of the Earth's climate system.

  • How does excess energy from the sun impact the Earth's climate?

    Excess energy from the sun is mostly absorbed by the oceans, leading to rising sea levels and increased ocean temperatures. This absorption of solar energy plays a significant role in regulating Earth's climate and understanding climate change. By studying how the oceans absorb and distribute this excess energy, scientists can gain insights into the mechanisms driving climate patterns and changes. Monitoring these oceanic processes is crucial for predicting and mitigating the impacts of climate change on a global scale.

  • What role does the greenhouse effect play in maintaining Earth's temperature?

    The greenhouse effect, driven by water vapor and greenhouse gases, plays a crucial role in maintaining Earth's temperature. This natural process involves the trapping of heat in the Earth's atmosphere, which helps regulate the planet's temperature and create a habitable environment for life. Without the greenhouse effect, Earth would be much colder, making it difficult for life to thrive. Understanding how greenhouse gases interact with the atmosphere is essential for predicting and managing changes in Earth's climate system.

  • How does the MPL contribute to climate change research?

    The MPL, equipped with a camera featuring 350 spectral channels, plays a vital role in climate change research by mapping global changes in land cover, emissions, sequestration, and impacts on the planet. This advanced instrument aids in studying radiation imbalance, cloud changes, and feedbacks, providing valuable data for understanding the complexities of Earth's climate system. By utilizing the MPL's capabilities, researchers can enhance adaptability, sustainability, food security, pollution control, and mitigation actions, contributing to informed decision-making in climate change mitigation and adaptation strategies.

  • Why is continuous learning and active monitoring crucial for climate action?

    Continuous learning and active monitoring are crucial for effective climate action as they enable a better understanding of the impact of actions on climate systems. By actively monitoring feedback systems and staying informed about climate data, policymakers and researchers can make informed decisions to address climate change challenges. This approach allows for the implementation of adaptive strategies, multidisciplinary collaboration, and holistic solutions that consider the entire Earth system. Through ongoing learning and monitoring, stakeholders can track progress, identify areas for improvement, and work towards sustainable solutions for mitigating climate change.

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Summary

00:00

Evolution of Optical Radiation Measurement Technology

  • In 1860, the parliamentary candle was the reference for light, with all optical radiation measurements traceable to it.
  • Electrical substitution radiometers were developed in the 1890s to compare electrical power's heating effect with optical power.
  • Cooling the radiometers to near absolute zero increased sensitivity by a factor of 1,000, allowing for precise radiation absorption measurements.
  • A new instrument optimized for optical radiation measurement was designed in the late '70s and early '80s, improving performance by a factor of 100.
  • The instrument was crucial for measuring the energy imbalance of the earth, a key factor in climate change research.
  • A mechanical cooling engine replaced liquid cryogen, making it feasible to launch the instrument into space for climate change measurements.
  • A smaller version of the instrument was built and placed in Davos, serving as the world reference for solar energy at ground level.
  • Plans are in place to launch the instrument on a satellite in the early 2030s to enhance climate change monitoring and satellite references.
  • The greenhouse effect, driven by water vapor and greenhouse gases, plays a crucial role in maintaining Earth's temperature.
  • Excess energy from the sun is mostly absorbed by the oceans, leading to rising sea levels and increased ocean temperatures, crucial for understanding climate change.

15:37

Understanding Earth's Complexity for Climate Action

  • Earth system complexity is understood by scientists, but human society is even more intricate with feedback loops influencing decisions like travel and heating choices.
  • Tackling climate change requires a holistic approach considering the entire system, multidisciplinary collaboration, and adaptive strategies.
  • Continuous learning and active monitoring of feedback systems are crucial to understand the impact of actions on climate.
  • Climate policies like achieving net zero by 2050 lead to technological or socioeconomic innovations, altering greenhouse gas emissions and land use.
  • Monitoring greenhouse gas emissions and land use through programs like Gemma is essential for credibility and leadership in net zero commitments.
  • Satellites like TRUTHS, IASI-NG, and FORUM measure essential climate variables to provide detailed information on climate change.
  • Metrology principles ensure stable, comparable, and interoperable satellite data for accurate climate measurements.
  • Historical comparisons and uncertainty tree diagrams are used to calibrate and understand satellite data for climate monitoring.
  • Observations and trustworthy data based on metrology are crucial for effective climate action in the next 20-30 years.
  • The TRUTHS mission, led by the UK and implemented by the European Space Agency, aims to provide a benchmark reference in space to support climate emergency responses.

31:17

Enhancing Climate Detection with Space Calibration

  • The smaller the uncertainty, the easier it is to measure change and detect it early.
  • Measuring incoming solar radiation is crucial as any change in the sun's output impacts climate.
  • A gold standard in space will provide calibration for other satellites, enhancing their performance.
  • The MPL will be flown into space, acting as a metrology laboratory to detect change earlier.
  • The MPL is equipped with a camera with 350 spectral channels, offering superior performance.
  • Addressing climate sensitivity involves studying radiation imbalance, cloud changes, and feedbacks.
  • The MPL aims to aid adaptability, sustainability, food security, pollution control, and mitigation actions.
  • The MPL maps global changes in land cover, emissions, sequestration, and impacts on the planet.
  • Establishing SI traceability involves using a hyperspectral imaging spectrometer and a cryogenic radiometer.
  • The MPL's calibration process involves a laser, cryogenic radiometry, photodiodes, and a star facility.

46:45

"UK and Airbus team work on TRUTHS"

  • Airbus team is close to achieving their goal, despite atmospheric noise spikes affecting accuracy.
  • Global collaboration is essential for building an interoperable system like TRUTHS, set to launch in 2030 by ESA.
  • UK aims for economic growth while maintaining a sustainable environment, focusing on becoming a global center for trusted earth observation data.
  • UK is actively involved in developing launch capabilities, building satellites, analyzing data, and educating the youth for future sustainability.
  • TRUTHS mission in 2030 is crucial for revolutionizing space and leveraging satellite power for climate action.
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