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Detecting Microbiology in the Upper Atmosphere: Relative-Velocity Filtered Sampling.

Arjun Berera1, Daniel J Brener1, Charles S Cockell2

  • 1The Higgs Centre for Theoretical Physics, University of Edinburgh, Edinburgh, UK.

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Summary
This summary is machine-generated.

This study explores the upper limits of Earth's biosphere, proposing methods to detect biological material in the mesosphere and lower thermosphere. New detector designs aim to overcome contamination challenges for atmospheric research.

Keywords:
Biosphere and upper atmosphere samplingMesosphereThermosphere

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Area of Science:

  • Atmospheric Science
  • Astrobiology
  • Aeronomy

Background:

  • The vertical extent of Earth's biosphere remains incompletely defined, particularly in the upper atmosphere.
  • The mesosphere and lower thermosphere are largely unexplored for biological material due to historical focus on lower atmospheric regions.

Purpose of the Study:

  • To practically investigate the potential altitude limits of Earth's biosphere.
  • To propose novel methodologies for detecting biological material in the upper atmosphere, specifically the mesosphere and lower thermosphere.

Main Methods:

  • Reviewing recent technological advancements, including CubeSats and rocket-borne samplers (e.g., MAGIC).
  • Suggesting strategies for sampling biological material in the "ignore-osphere" (mesosphere and lower thermosphere).
  • Proposing a new detector design to mitigate contamination by filtering particles based on size and relative velocity.

Main Results:

  • Identified CubeSats and MAGIC samplers as viable tools for atmospheric biological sampling.
  • Addressed the critical issue of contamination in upper atmospheric sampling.
  • Proposed a novel detector concept to enhance the reliability of detecting extraterrestrial biological material.

Conclusions:

  • The upper atmosphere, specifically the mesosphere and lower thermosphere, presents a potentially viable, yet overlooked, region for biosphere exploration.
  • Technological advancements offer practical solutions for sampling and detecting biological material at high altitudes.
  • Further research and development of specialized detection equipment are crucial for confirming the presence of life beyond the conventionally defined biosphere.