This study explores how small differences in sensor height can affect air quality and weather measurements near the ground. We focused on a coastal reserve in Puerto Rico, a location where ocean breezes and local terrain shape the environment. Two instruments were used: one placed 4 meters above the ground, and another at 10 meters. These sensors measured weather conditions like temperature, humidity, and wind, as well as particles in the air known as aerosols, including PM1 and PM10, which are tiny particles that can affect health and climate.

Our results showed that even a few meters in height can lead to noticeable changes in measurements. For example, temperature and humidity changed more quickly closer to the ground, and wind direction varied more. We also observed differences in the amount and behavior of airborne particles depending on sensor height. These findings are important because they show that where and how we measure air pollution and weather can strongly affect the data we collect. Understanding these small-scale differences can help scientists build better monitoring systems, especially in sensitive ecosystems like coastal zones.