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Penguin guano may help reduce effects of climate change in Antarctica

  • Matthew Boyer and colleagues measured atmospheric ammonia and aerosol particle concentrations near a 60,000-strong Adélie penguin colony on the Antarctic Peninsula in early 2023.
  • They conducted the study to assess how gases from penguin guano influence cloud formation over the region, as ammonia can seed cloud particles when combined with sulfuric acid.
  • When winds blew from the penguin colony, ammonia concentrations spiked to 13.5 parts per billion—about a thousand times above background—causing aerosol particle levels to surge and fog formation to occur.
  • Boyer highlighted that even after the penguins had departed from the colony, the ammonia released from their droppings persisted for about a month, with concentrations remaining roughly 100 times above normal levels.
  • The findings suggest penguin guano may boost cloudiness and help cool Antarctica, but declining penguin populations could reduce this effect, possibly intensifying regional warming in the future.
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The Telegraph broke the news in London, United Kingdom on Thursday, May 22, 2025.
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