Penguin poop helps form clouds, could save Antarctica from climate crisis: Study

Antarctica hosts an array of life, from the vast oceans teeming with fish to the waddling, plump penguins that fish in the waters. New evidence suggests that Adélie penguins have deeper ties to the continent than we previously expected.

Researchers from the University of Helsinki reveal that the ammonia present in Adélie penguin excrements, or guano, tremendously increases the chance of cloud formation over the Antarctic Peninsula, which can further suppress the warming of the region and slow down the melting of ice caps.

The researchers conducted a two-month field campaign in early 2023 near Marambio Base on the Antarctic Peninsula.

Their goal: to investigate how gases emitted by penguin colonies contribute to atmospheric chemistry and cloud formation in a region that’s especially vulnerable to climate change.

Penguins as climate influencers

The research focused on a massive breeding colony of around 60,000 Adélie penguins (Pygoscelis adeliae) located about eight kilometers from the study site. As penguins nested and defecated in large quantities on snow and soil, their guano released substantial amounts of ammonia — a compound known to enhance the formation of aerosols, which act as cloud condensation nuclei.

These microscopic particles allow water vapor to condense, forming clouds that reflect sunlight and help cool Earth’s surface.

The researchers found that ammonia concentrations reached as high as 13.5 parts per billion when winds blew from the penguin colony — a staggering 1,000-fold increase over background levels measured in penguin-free areas.

This shift was enough to increase aerosol particle concentrations by 10,000 times and form fog associated with visible clouds powered by penguin particles immediately after the wind shift—a remarkable feat.

Surprisingly, the penguins’ climate-altering emissions didn’t end when the birds migrated. Even a month after the migration of the colony in late February, the guano-supported soil was still releasing ammonia at an astonishing rate of over 100 times the baseline level.

Without the physical presence of the penguins, their guano still managed to alter the environment significantly. According to researchers, this suggests that the droppings of the species have long-lasting effects on the atmospheric chemistry of Antarctica, which demonstrates how colonies of seabirds might alter the local weather where they are to foster self-sustaining ecosystems.

Clouds, cooling, and conservation

The study offers new insight into how biological activity — even something as unassuming as bird poop — can influence atmospheric processes and potentially mitigate the impacts of climate change.

Increased cloud cover generated by ammonia emissions could insulate surface temperatures, helping to retain or even extend the seasonal presence of sea ice, which is critical for penguin survival.

Antarctica’s ecosystem is increasingly stressed due to climate change, with rapid declines in sea ice coverage. The authors note that while these changes make the penguins more vulnerable, the birds are still contributing to the protection of their habitat through natural processes that modulate the clouds and regional weather patterns.

In balancing the myriad interactions fueling Earth’s climate and the feedback loops within it, the unassuming penguin may turn out to be an astonishingly important player.