NOAA
Noaa: Pmel: Acoustic Monitoring, Bioacoustics
Outlines the National Marine Mammal Laboratory's project studying whale acoustics (the sounds whales make). Links to clear acoustics tutorial. Also includes whale biology, with acoustic descriptions and sound clips of their calls. Very...
NOAA
Noaa: Pacific Marine Environmental Laboratory: What Is El Nino?
This page tells you what El Nino is, provides links to animations and videos on El Nino, explains how to recognize El Nino, and discusses the history of significant El Nino events.