Microscopic algae are growing on Antarctic snow, turning patches green and red. Nutrients from penguin droppings are fertilizing these algae, leading to increased absorption of solar energy.
When snow is covered with red algae, it absorbs about 20% more solar energy than clean white snow. This figure rises to about 40% for green algae. This process can accelerate local melting. Researchers warn that ignoring the impact of snow algae in melt models could lead to inaccurate estimates of ice-free land emerging along Antarctica’s coast. As climate change progresses, some penguin populations may expand, potentially spreading algae to new areas.
Source: Down To Earth