Insect traps on the top of the world (IMAGE) University of Helsinki Caption The advection fog often fills the valley floor in the spring, being one of the factors affecting the micro-climate encountered by the insects. Credit Tuomas Kankaanpaa Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.