Glossary Search Results

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

You are browsing all terms beginning with "M"

72 terms were found.

Displaying Page 7 (of 8)

Search again....

Page: [<< Prev] 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |

Monsoon

A persistent seasonal wind, often responsible for a seasonal precipitation regime.

Montreal Protocol on Substances that Deplete the Ozone Layer

The Montreal Protocol and its amendments control the phaseout of ozone depleting substances production and use. Under the Protocol, several international organizations report on the science of ozone depletion, implement projects to help move away from ozone depleting substances, and provide a forum for policy discussions. In the United States, the Protocol is implemented under the Clean Air Act Amendments of 1990. See ozone depleting substance, ozone layer.

Motor gasoline

A complex mixture of relatively volatile hydrocarbons, with or without small quantities of additives, obtained by blending appropriate refinery streams to form a fuel suitable for use in spark-ignition engines. Motor gasoline includes both leaded and unleaded grades of finished gasoline, blending components, and gasohol. See hydrocarbons.

Mount Pinatubo

A volcano in the Philippine Islands that erupted in 1991. The eruption of Mount Pinatubo ejected enough particulate and sulfate aerosol matter into the atmosphere to block some of the incoming solar radiation from reaching Earth's atmosphere. This effectively cooled the planet from 1992 to 1994, masking the warming that had been occurring for most of the 1980s and 1990s.

MRF

Medium Range Forecast model generated every 12 hours by NCEP.

MSLP

Mean sea level pressure.

Mudflow

A well-mixed mass of water and alluvium which, because of its high viscosity and low fluidity as compared with water, moves at a much slower rate, usually piling up and spreading over the fan like a sheet of wet mortar or concrete. (Woolley, 1946, p. 75.)

Mulch

A natural or artificial layer of plant residue or other material on the soil surface. Mulch reduces erosion, conserves soil moisture, inhibits weed growth, and can provide the soil with organic matter as it breaks down. Mulch till prepares the soil so as to leave plant residues (or other mulching materials) on or near the surface.

Multiplier

The number of times new investment spending will be respent to produce a certain amount of new income.

Municipal solid waste (MSW)

Residential solid waste and some non-hazardous commercial, institutional, and industrial wastes. This material is generally sent to municipal landfills for disposal. See landfill.

Page: [<< Prev] 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |