Image: patterns of air movement caused by a flying locust (middle and right columns) are similar to air patterns predicted by a computer simulation (left column).

These experts are especially concerned that new patterns of air movement in the Arctic could disrupt the Northern Hemisphere's jet streams - which are apparently weakening and moving northward.

You can land on an airstrip with various approach patterns, depending on air traffic control guidelines due to weather, traffic density, wind speed, and so on.