Since most plankton is smaller than we can see, they must be looked at using a microscope. They are usually strained from the water using fine mesh nets or sieves with tiny holes. Typical plankton nets have a round opening and look like a funnel that leads into a collection bucket at the end of the net. The nets are
One of the simplest biological samplers, zooplankton nets are made in a wide variety of styles and sizes. The two nets in the MARMAP Bongo vertical-haul net system explained here each have a mouth diameter of about 25 cm.
Learn about how scientists measure salinity, temperature, and depth (CTD). Information can be found in Beginner, Intermediate, and Advanced levels, as well as in English or Spanish language.
What is it and why do we use it?
An Acoustic Doppler Current Profiler, or Acoustic Doppler Profiler, is often referred to with the acronym ADCP. Scientists use the instrument to measure how fast water is moving across an entire water column. An ADCP anchored to the seafloor can measure current speed not just at the bottom, but also at
Storyteller Films presents the scientific efforts to understand and detect the movement of King Crab from Deep to shallow waters off the continental shelf of Antarctica. The film was made by the Palmer and Oden 2010/2011 expeditions. The crabs are an invasive species that may have large effects on this diverse marine ecosystem. The film ha a comical flair though
Do you wonder what Earth's Polar Regions are like? Where do polar bears live? Where do penguins swim? Why does the Sun never shine in winter in the Arctic? Why does aurora occur near the Earth’s Poles? How big are the Earth’s ice caps, and are they changing? The Earth’s Polar Regions are hosts to unique phenomena and ecosystems –
This visual field guide covers organisms found at Ross Island and McMurdo Sound, Antarctica. It aims to facilitate underwater/topside field identification from visual characters. The National Science Foundation's Office of Polar Programs sponsored Norbert Wu on an Artist's and Writer's Grant and this Field Guide is a direct result of that sponsorship and Norbert Wu's efforts.