Definitions - m

The region around the earth in which the earth's magnetic field plays a dominant part in controlling the physical processes that take place.

Clouds that look like pouches hanging from the underside of a cloud.

Programs which by law require consumers to separate trash so that some or all recyclable materials are recovered for recycling rather than going to landfills.

The part of the earth between the crust and the core.

A volcano on the island of Hawaii where scientists have maintained the longest continuous collection of reliable daily atmospheric records.

The average temperature experienced from the combination of all the surface temperatures in a room, i.e walls, floors, ceilings, furniture, and people.

The scale of meteorological phenomena that ranges in size from a few km to about 100 km. It includes local winds, thunderstorms, and tornadoes.

A scientist who studies the weather.

The science of weather related phenomena.

A hydrocarbon that is a greenhouse gas with a global warming potential most recently estimated at 21. Methane is produced through anaerobic (without oxygen) decomposition of waste in landfills, animal digestion, decomposition of animal wastes, production and distribution of natural gas and petroleum, coal production, and incomplete fossil fuel combustion.

An effective pesticide; used to fumigate soil and many agricultural products. Because it contains bromine, it depletes stratospheric ozone when released to the atmosphere.

The merging of the urbanized areas of separate metropolitan regions; Megalopolis is an example of this process.

This is a small Inverter that mounts on to the back of each solar panel instead of having one large Inverter used by all the panels. While it works better when partial shading is a concern, it can increase the cost of the overall system.

Micro wind turbine is an umbrella term for small scale wind turbines that are typically deployed on or near buildings and used to generate electricity that is transmitted direct to the property.

Micro wind turbines have in the past been criticized for being visually intrusive and generating less energy than expected.

However, suppliers maintain that models can generate up to 100Kw of energy and represent an efficient source of on-site renewable energy as long as they are situated correctly.

A strong localized downdraft less than 4 km wide that occurs beneath severe thunderstorms. A strong downdraft greater than 4 km across is called a down burst.

A microgrid is a group of interconnected loads and distributed energy resources within clearly defined electrical boundaries that to the grid act as a single controllable entity. A microgrid can connect and disconnect from the grid to allow it to operate in both grid-connected or island-mode.

The area of the ocean beneath the twilight zone, extending from 3,000 feet (1,000 m) down to the ocean floor, where only about 1 percent of marine life can survive.

The cultivation of a single species crop.

A coating or discoloration caused by various saprotrophic fungi that develop in a damp atmosphere on the surface of stored food, fabrics, wallpaper, etc.

A change in the genetic material of a living organism, usually in a single gene, which can be passed on to future generations.