What are aerosols primarily responsible for in the nutrient cycle?

Aerosols play a significant role in the nutrient cycle, primarily because they can deliver nutrients to ecosystems through a process known as dry deposition. When aerosols, which are tiny solid or liquid particles suspended in the atmosphere, settle back to the earth, they can carry essential nutrients like nitrogen, phosphorus, and sulfur. This nutrient supply is particularly important in areas where terrestrial and aquatic systems may lack sufficient natural nutrient inputs.

The contribution of aerosols to the nutrient cycle is vital for maintaining ecosystem health, as many nutrients are necessary for plant growth and aquatic productivity. This process of dry fall helps to replenish the soil and water bodies, enhancing their fertility and supporting diverse biological communities.

While the other options mention aspects related to soil and microbial processes, they do not accurately reflect the primary function of aerosols in the nutrient cycle, which is their role in nutrient supply.