How does dry deposition affect land during periods without rain?

Dry deposition refers to the accumulation of acidic particles and gases from the atmosphere onto the Earth's surface during periods when no precipitation is occurring.12

Even in the absence of rain, snow, or fog, these acidic substances can settle on landscapes and affect the environment in several ways:

• Soil Chemistry Alteration: Dry deposition contributes to soil acidification by introducing acidic compounds that consume base cations—such as calcium and magnesium—which are necessary for neutralizing acidity and supporting plant growth.3
• Nutrient Leaching: As these base cations are used to neutralize the deposited acids, they are depleted from the soil, depriving plants of essential nutrients.23
• Toxicity: The process can mobilize toxic elements, such as aluminum, from soil particles and rock, releasing them into the environment in a form that is harmful to plant roots and other organisms.23
• Surface Damage: In urban environments, dry deposition contributes to the corrosion of surfaces and the deterioration of buildings and monuments made of materials like limestone and marble.2

Essentially, dry deposition ensures that the harmful effects of acid deposition persist regardless of weather conditions.1