| Section S | S index | 541-549 of 1376 terms |
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snow blindnessImpaired vision or temporary blindness caused by sunlight reflected from snow surfaces. The medical name is niphablepsia. “Symptoms of snow blindness are a gritty sensation under the eyelids, excessive watering, double vision. First aid is to place the casualty in the dark or bandage the eyes; application of cool compresses alleviates pain. Most cases will recover in 18 hours without medical treatment”(from Glossary of Arctic and Subarctic Terms 1955).
Arctic, Desert, Tropic Information Center (ADTIC) Research Studies Institute, 1955: Glossary of Arctic and Subarctic Terms, ADTIC Pub. A-105, Maxwell AFB, AL, 90 pp.
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snow blink(Also called snow sky.) A relatively bright region on the underside of clouds produced by the reflection of light by snow. This term is used in polar regions where it contributes to the sky map; snow blink is brighter than ice blink, or reflection of light by land or water.
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snow boardSpecially constructed board used to identify the surface of snow or ice that has been covered by more recent snowfall. Snow boards are used as an aid in obtaining representative samples of solid precipitation at times when the catch in the gauge is considered erroneous, for example, in windy weather and wet snow. They provide the reference level for the measurement of new snowfall and ice. They are constructed of thin metal, wood, or other light material so as to not sink in the snow. They should be at least 40 cm by 40 cm and covered with white cloth or plastic.
NASA/National Weather Service, 1972: National Weather Service Observing Handbook No. 2, Substation Observations, NOAA, US GPO
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snow capSnow covering the ridges and peaks of mountains when no snow exists at lower elevations.
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snow cloudAny cloud from which snow falls; a popular term having no technical connotation.
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snow concreteSnow that has been compressed at low temperatures and that sets into a tough substance of considerably greater strength than uncompressed snow (from Glossary of Arctic and Subarctic Terms 1955).
Arctic, Desert, Tropic Information Center (ADTIC) Research Studies Institute, 1955: Glossary of Arctic and Subarctic Terms, ADTIC Pub. A-105, Maxwell AFB, AL, 90 pp.
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snow courseAn established line or transect of measurements of snow water equivalent across a snow field in representative mountainous terrain, where appreciable snow accumulates, to monitor seasonal snowpack. Although intended to be measured over a distance of several hundred meters, in practice snow courses may consist of four or so individual measurements. The measurements are used for runoff prediction and for assessing the potential for flooding or drought, and they are also used in longer- term climatological studies. Along the snow course, core samples are taken periodically (often monthly) throughout the snow season. Approximately 300 snow courses are operated over the western United States.
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snow cover1. The areal extent of snow-covered ground, usually expressed as percent of total area in a given region. 2. In general, a layer of snow on the ground surface. Compare snowfield, snowpack. 3. The depth of snow on the ground, usually expressed in inches or centimeters.
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