haze

1. 1. Atmospheric moisture, dust, smoke, and vapor that diminishes visibility.
   2. A partially opaque covering: Let the polish dry to a haze before buffing it.
2. A vague or confused state of mind.

[Probably back-formation from HAZY.]

1. To persecute or harass with meaningless, difficult, or humiliating tasks.
2. To initiate, as into a college fraternity, by exacting humiliating performances from or playing rough practical jokes upon.

[Perhaps from obsolete haze, to frighten, from obsolete French haser, to annoy, from Old French.]

Term in brewing to indicate cloudiness of beer. Chill haze appears at 0 °C and disappears at 20 °C; permanent haze remains at 20 °C but there is no fundamental difference. It is caused by gums derived from the barley, leucoanthocyanins from the malt and hops, and glucose, pentoses, and amino acids.

noun

A thick, heavy atmospheric condition offering reduced visibility because of the presence of suspended particles: brume, fog, mist, murk, smaze. See clear/unclear.

Definition: cloudy air
Antonyms: clarity, clearness

v. force (a new or potential recruit to the military) to perform strenuous, humiliating, or dangerous tasks: rookies were mercilessly hazed.

See the Introduction, Abbreviations and Pronunciation for further details.

A suspension of particles in the air, slightly obscuring visibility. These particles may be naturally occurring—sea salt or desert dust—or may be man-made, like the smoke formed from the burning of fossil fuels.

Dullness of a paint film resulting from formation of very fine surface imperfections.

Tutor's tip: My allergies to "hays" (grasses used as feed) create a horrible "haze" (dullness or fog) in my head.

For other uses, see Haze (disambiguation).

Haze over Kuala Lumpur.

Los Angeles skyline, showing haze.

Haze is traditionally an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. The WMO manual of codes includes a classification of horizontal obscuration into categories of fog, ice fog, steam fog, mist, haze, smoke, volcanic ash, dust, sand and snow. ^[1] Sources for haze particles include farming (ploughing in dry weather), traffic, industry, and wildfires.

Seen from afar (e.g. approaching airplane) and depending upon the direction of view with respect to the sun, haze may appear brownish or bluish, while mist tends to be bluish-grey. Whereas haze often is thought of as a phenomenon of dry air, mist formation is a phenomenon of humid air. However, haze particles may act as condensation nuclei for the subsequent formation of mist droplets; such forms of haze are known as "wet haze."

In the United States and elsewhere, the term "haze" in meteorological literature generally is used to denote visibility-reducing aerosols of the wet type. Such aerosols commonly arise from complex chemical reactions that occur as sulfur dioxide gases emitted during combustion are converted into small droplets of sulfuric acid. The reactions are enhanced in the presence of sunlight, high relative humidity, and stagnant air flow. A small component of wet haze aerosols appear to be derived from compounds released by trees, such as terpenes. For all these reasons, wet haze tends to be primarily a warm-season phenomenon. Large areas of haze covering many thousands of kilometers may be produced under favorable conditions each summer.

Contents 1 Air pollution 2 Obscuration 3 See also 4 Notes 5 External links

Air pollution

Main article: smog

Haze over the North China Plain.

Haze often occurs when dust and smoke particles accumulate in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a usually low-hanging shroud that impairs visibility and may become a respiratory health threat. Industrial pollution can result in dense haze, which is known as smog.

Since 1991, haze has been a particularly acute problem in Southeast Asia. In response the ASEAN countries agreed on a Regional Haze Action Plan (1997) and later signed the Agreement on Transboundary Haze Pollution (2002). Under the agreement the ASEAN secretariat hosts a co-ordination and support unit.^[2]

Obscuration

Haze obscuring the Faisal Mosque in Islamabad.

Haze causes issues in the area of terrestrial photography, where the penetration of large amounts of dense atmosphere may be necessary to image distant subjects. This results in the visual effect of a loss of contrast in the subject, due to the effect of light scattering through the haze particles. For these reasons, sunrise and sunset colors appear subdued on hazy days, and stars may be obscured at night. In some cases, attenuation by haze is so great that, toward sunset, the sun disappears altogether before reaching the horizon (see, for example, Figure 1 in http://www.spc.noaa.gov/publications/corfidi/haze.html). Haze can be defined as an aerial form of the Tyndall effect therefore unlike other atmospheric effects such as cloud and fog, haze is spectrally selective: shorter (blue) wavelengths are scattered more, and longer (red/infrared) wavelengths are scattered less. For this reason many super-telephoto lenses often incorporate yellow filters or coatings to enhance image contrast.

Infrared (IR) imaging may also be used to penetrate haze over long distances, with a combination of IR-pass optical filters (such as the Wratten 89B) and IR-sensitive detector.

See also

• Arctic haze
• Saharan Air Layer
• Smog
• Asian brown cloud

Notes

1. ^ WMO Manual on Codes
2. ^ ASEAN action hazeonline

External links

Wikimedia Commons has media related to: Haze

• National Pollutant Inventory - Particulate matter fact sheet
• Haze over the central and eastern United States

v • d • e Pollution Air pollution Acid rain · Air Quality Index · Atmospheric dispersion modeling · Chlorofluorocarbon · Global dimming · Global distillation · Global warming · Indoor air quality · Ozone depletion · Particulate · Smog Water pollution Eutrophication · Hypoxia · Environmental monitoring · Freshwater environmental quality parameters · Marine pollution · Marine debris · Ocean acidification · Oil spill · Pharmaceuticals and personal care products · Ship pollution · Surface runoff · Thermal pollution · Urban runoff · Wastewater · Waterborne diseases · Water quality · Water stagnation Soil contamination Bioremediation · Electrical resistance heating · Herbicide · Pesticide · Soil Guideline Values (SGVs) Radioactive contamination Actinides in the environment · Environmental radioactivity · Fission product · Nuclear fallout · Plutonium in the environment · Radiation poisoning · Radium in the environment · Uranium in the environment Other types of pollution Invasive species · Light pollution · Noise pollution · Radio spectrum pollution · Visual pollution Inter-government treaties Montreal Protocol · Kyoto Protocol · CLRTAP · OSPAR · Stockholm Convention Major organizations DEFRA · Environment Agency (England and Wales) · U.S. EPA · EEA · Greenpeace

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Dansk (Danish)
1.
n. - tåge, dis, forvirring, uklarhed
v. intr. - tildise

2.
v. tr. - forfølge, chikanere, 'indvi/døbe' nyankommen, underkaste optagelsesceremoni

Nederlands (Dutch)
waas, mist, floers, rook, beneveld verstand, ontgroening, ontgroenen, nevelig worden/maken, het leven zuur maken

Français (French)
1.
n. - brume légère, obscurité/incertitude de l'esprit
v. intr. - devenir brumeux, se couvrir de buée, se voiler, se brouiller

2.
v. tr. - (US, Univ) bizuter

Deutsch (German)
1.
n. - Dunst, Verwirrung
v. - vernebeln, dunstig machen, dunstig sein

2.
v. - durch schwere Arbeit bestrafen, schinden, belästigen, mit übermäßiger Arbeit belasten

Ελληνική (Greek)
v. - συσκοτίζω/-ομαι, φλομώνω, παραζαλίζω, (ΗΠΑ) υποβάλλω σε καψόνι/νίλα
n. - αχλύς, καταχνιά, πούσι, (μτφ.) ασάφεια

Italiano (Italian)
stuzzicare, fare scherzi, foschia

Português (Portuguese)
v. - enevoar, maltratar, dar trote
n. - névoa (f)

Русский (Russian)
дымка, заволакивать, изнурять работой, зло подшучивать

Español (Spanish)
1.
n. - neblina, vaguedad, confusión
v. intr. - nublar

2.
v. tr. - gastar novatadas a, acosar con tareas sin sentido

Svenska (Swedish)
v. - trakassera, skända, göra (bli) disig
n. - dis, förvirring

中文（简体）(Chinese (Simplified))
1. 霾, 薄雾, 模糊, 朦胧, 变朦胧, 变糊涂

2. 使劳累, 欺侮, 戏弄, 使苦恼

中文（繁體）(Chinese (Traditional))
1.
v. tr. - 使勞累, 欺侮, 戲弄, 使苦惱

2.
n. - 霾, 薄霧, 模糊, 朦朧
v. intr. - 變朦朧, 變糊塗

한국어 (Korean)
1.
n. - 아지랑이, 안개, 희미한 것, 몽롱
v. intr. - 안개로 둘러싸다, 흐릿해지다

2.
v. tr. - 못살게 굴다, 괴롭히다, 혹사하다

日本語 (Japanese)
n. - 霞, もや, もうろう状態, 煙霧
v. - かすみがかかる, かすませる, いじめる, しごく, こき使う

العربيه (Arabic)
‏(فعل) يغيم, يصبح أو يجعله غائما أو ضبابيا, ينهك شخصا أو يعاقبه بأن يفرض عليه عملا مرهقا أو غير ضروري, يرهق تلميذا بمواصله السخريه منه (الاسم) سديم, ضباب رقيق, غموض في الذهن أو الإدراك العقلي‏

עברית (Hebrew)
n. - ‮טשטוש, אי-בהירות, בלבול‬
v. intr. - ‮השפיל (טירון), הציק, "טרטר" בעבודה קשה‬
v. tr. - ‮השפיל (טירון), הציק, "טרטר" בעבודה קשה‬

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