Pit Bull, left, and Enrique Iglesias perform in the halftime show of an NFL football game between the Miami Dolphins and Dallas Cowboys, Thursday, Nov. 24, 2011, in Arlington, Texas.
Dead zone may refer to: Dead zone (cell phone) , an area where cell phones cannot transmit to a nearby cell site Dead zone (ecology) , low-oxygen areas in the world's oceans Dead zone (military) , blindspots in a fortification's visual field which were relatively sheltered from defending fire Films Dragon Ball Z: Dead Zone , the first of thirteen Dragon Ball Z films Whisper of Dead Zone, the translated English title of the 2012 Turkish film ÃlÃ¼ BÃ¶lgeden FÄ±sÄ±ltÄ±lar .
During the warm summer months, when there is little mixing in the water column, the bottom water can stagnate and become hypoxic, or low in oxygen. If the hypoxia becomes severe enough, you have a dead zone. The size of the Gulf of Mexico dead zone varies from year to year. In 2012, the dead zone covered less area than usual, which may have been due to drought conditions in the Midwestâlow rainfall means less runoff from land. This year the dead zone is slightly larger than average.