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Fraction of the sky obscured by clouds when observed from a particular location
Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds on average when observed from a
Cloud_cover
Visible mass of particles suspended in the atmosphere
(ARM) (US) Bioprecipitation Ceiling Cloud albedo Cloud Appreciation Society Cloud cover Cloud forcing Cloud seeding Clouds (sculpture) Cloudscape (art) Cloudscape
Cloud
Type of rainforest
seasonal low-level cloud cover, usually at the canopy level, formally described in the International Cloud Atlas (2017) as silvagenitus. Cloud forests often
Cloud_forest
Family class 3 cloud type
clumps or patches of white to dark gray clouds that normally form in groups. The individual cloud elements, which cover more than 5 degrees of arc each, can
Stratocumulus_cloud
Type of meteorological illustration
patterns in atmospheric pressure, temperature, wind speed and direction, cloud cover, precipitation, and other parameters. The most common station plots depict
Station_model
Type of middle-altitude cloud
cloud appears to rise and fall. Altostratus and altocumulus clouds, both of which are mid-level clouds, are commonly measured together in cloud cover
Altostratus_cloud
Stationary lentil-shaped cloud
Lenticular clouds (from Latin lenticularis 'lentil-shaped', from lenticula 'lentil') are stationary clouds that form mostly in the troposphere, typically
Lenticular_cloud
Measurement of the height of the base of the lowest clouds
height of the base of the lowest clouds (not to be confused with cloud base which has a specific definition) that cover more than half of the sky (more
Ceiling_(cloud)
have a strong impact on cloud cover and organization, by triggering new convection at the gust front and suppressing clouds in its interior. Cold pools
Cold_pool
Danish physicist and professor
collaboration of solar ray/astrophysics experts found that the change in global cloud cover is closely correlated with El Niño–Southern Oscillation and uncorrelated
Henrik_Svensmark
Unit of measurement for quantifying cloud cover
of cloud cover at any given location such as a weather station. Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud
Okta
Genus of atmospheric cloud
Cirrus (cloud classification symbol: Ci) is a genus of high-altitude cloud made of ice crystals. Cirrus clouds typically appear delicate and wispy with
Cirrus_cloud
Thickness of a cloud
thin clouds (such as cirrus clouds) do not generate any precipitation at the surface of the Earth. Cloud cover Huschke, Ralph E. (1970) [1959]. "Cloud height"
Cloud_height
Meteorological condition
Organization, is the meteorological condition of clouds obscuring at least 95% of the sky. However, the total cloud cover must not be entirely due to obscuring phenomena
Overcast
Feedback between climate change and the effect of clouds on radiation
A cloud feedback is a climate change feedback where some aspects of cloud characteristics (e.g. cloud cover, composition or height) are altered due to
Cloud_feedback
Town in Plateau State, Nigeria
a noticeable seasonal change in Barkin Ladi's average percentage of cloud cover. In Barkin Ladi, the clearer portion of the year lasts 3.8 months, starting
Barkin_Ladi
Type of altocumulus cloud
altocumulus cloud. The term lacunosus is from Latin, meaning "full of gaps". This type of cloud appears as holes present in an altocumulus cloud cover resembling
Altocumulus_lacunosus_cloud
City and LGA in Taraba State, Nigeria
temperature of 63 °F. Throughout the year, Wukari's average percentage of cloud cover varies significantly according on the season. Around November 12 to March
Wukari
Volcano in Costa Rica
clear or partly cloudy only about 18% of the day, indicating prevalent cloud cover. Elevations within Arenal Volcano National Park also impact cloudiness;
Arenal_Volcano
Graphical presentation of weather variables
pressure are represented as lines. Cloud cover is represented in a layered format, providing an indication of the amount of cloud at different heights in the
Meteogram
Topics referred to by the same term
An okta is a unit for measuring cloud cover. Okta may also refer to: OKTA, a Macedonian oil company Okta, Inc., an American identity management company
Okta_(disambiguation)
Glass bridge and sculpture in Seattle, Washington, U.S.
Seattle Cloud Cover is an outdoor glass bridge and sculpture by American artist Teresita Fernández, installed in Olympic Sculpture Park in Seattle, Washington
Seattle_Cloud_Cover
LGA and Town in Nasarawa State, Nigeria
coldest month of the year in Keffi. The average proportion of sky covered by clouds in Keffi varies significantly seasonally throughout the year. The
Keffi
Optical phenomenon
Cloud iridescence or irisation is a colourful optical phenomenon that occurs in a cloud and appears in the general proximity of the Sun or Moon. The colours
Cloud_iridescence
Capital city of Ekiti State, Nigeria
the cool season, which runs from June through October. The amount of cloud cover varies significantly from season to season in Ado-Ekiti, with the brightest
Ado_Ekiti
Fraction of incoming sunlight reflected by clouds
irradiance. Generally, increased cloud cover correlates to a higher albedo and a lower absorption of solar energy. Cloud albedo strongly influences the
Cloud_albedo
Sculpture by Anish Kapoor in Chicago
Cloud Gate is a public sculpture by artist Anish Kapoor that is the centerpiece of Grainger Plaza at Millennium Park in the Loop community area of Chicago
Cloud_Gate
skies ranges from 25 MJ/m2 in December to 686 MJ/m2 in June. On average, cloud cover reduces the arrival of total solar radiation by 21% per year, and direct
Climate_of_Saint_Petersburg
precipitation fell (with a norm of 34 mm). The lower cloud cover is 1.5 points, the total cloud cover is 5.8 points. Daytime temperature during heat waves
Climate_of_Verkhoyansk
Fatal skydiving accident near Huron, Ohio, United States
drowned. The plane's pilot, unable to see the surface through heavy cloud cover, relied on guidance from the Cleveland Air Route Traffic Control Center
1967 Lake Erie skydiving disaster
1967_Lake_Erie_skydiving_disaster
Variation in brightness and the position of stars due to atmospheric refraction
governing astronomical seeing (the others being light pollution and cloud cover), atmospheric scintillation is defined as variations in illuminance only
Twinkling
Type of cloud
Stratus clouds are low-level clouds characterized by horizontal layering with a uniform base, as opposed to convective or cumuliform clouds formed by
Stratus_cloud
1780 darkness in New England and Canada
have been a combination of smoke from forest fires, a thick fog, and cloud cover. This was concluded more than two centuries after the event. According
New_England's_Dark_Day
1957 novel by Fred Hoyle
The Black Cloud is a 1957 science fiction novel by British astrophysicist Fred Hoyle. It details the arrival of an enormous cloud of gas that enters the
The_Black_Cloud
when there was no precipitation at all. The lower cloud cover is 3.8 points, the total cloud cover is 6.1 points. The average wind speed in the city is
Climate_of_Krasnodar
Biome with under 250 mm of annual rainfall
cold nights because there is no insulation provided by humidity and cloud cover. The diversity of climatic conditions, though quite harsh, supports a
Deserts_and_xeric_shrublands
Areas of low precipitation on the subtropical oceans
clouds. Unlike continental deserts, oceanic deserts maintain a relatively high cloud fraction throughout the year. Despite the pronounced cloud cover
Oceanic_deserts
Appearance of the sky in a clear night
of starlight, and artificial light pollution. Depending on local sky cloud cover, pollution, humidity, and light pollution levels, the stars visible to
Night_sky
Aerosol nucleation experiment at CERN
in present radiative forcing and climate models, since an increase in cloud cover reduces global warming. The core of the experiment is a stainless steel
CLOUD_experiment
Genus of atmospheric cloud
or as CH5 or 6 (depending on the amount of sky covered) if increasing in amount. If the high cloud covers the entire sky and takes on the form of a featureless
Cirrostratus_cloud
Height of the bottom of a cloud
landing. Ceiling (cloud) Cloud cover Cloud height Bradbury, Tom. Meteorology and Flight. A&C Black Publishers Ltd. ISBN 0713668318. "Cloud". National Geography
Cloud_base
Short-term state of the atmosphere
place and time, typically described in terms of temperature, humidity, cloud cover, and stability. On Earth, most weather phenomena occur in the lowest
Weather
summer, although the actual number of hours of sunlight is limited by cloud cover. The Falkland Islands have a maritime climate in the transition region
Climate of the Falkland Islands
Climate_of_the_Falkland_Islands
Control concept
One such feedback system is the interaction between solar radiation, cloud cover, and planet temperature. In many physical and biological systems, qualitatively
Negative_feedback
Spy Construct used for undetected Zeppeline-observations
observation car or sub-cloud car (German: Spähgondel or Spähkorb) is a crewed vessel that an airship hiding in cloud cover could lower several hundred
Spy_basket
American guided 155 mm howitzer projectile
velocity to maneuver to hit the target. Copperhead must be below any cloud cover at critical parts of the trajectory, and there must be sufficient visibility
M712_Copperhead
Town in Osun, Nigeria
significant seasonal change in the average percentage of the sky covered by clouds. Beginning about 16 November and lasting for 2.9 months, the clearer
Otan_Ayegbaju
LGA and town in Niger State, Nigeria
month of the year in Rijau. The average proportion of sky that is covered by clouds in Rijau varies significantly seasonally throughout the year. Beginning
Rijau
Ongoing mass extinction of amphibian species worldwide
Monteverde Harlequin frog and the Golden Toad. An increased level of cloud cover, a result of geoengineering[citation needed] and global warming, which
Decline in amphibian populations
Decline_in_amphibian_populations
American remote viewing pioneer (1933–2013)
don't poke up through the crystal cloud cover. You know I had a dream once something like this, where the cloud cover was a great arc ... sweeps over the
Ingo_Swann
LGA and town in Adamawa State, Nigeria
coldest month of the year in Gombi. The average proportion of sky covered by clouds in Gombi varies significantly seasonally throughout the year. Around
Gombi
typical example is of sunlight shining through a hole in cloud cover. A sunbreak piercing clouds normally produces a visible shaft of light reflected by
Sunbreak
Payload imaging sensor
measurements in large-scale global dynamics including changes in Earth's cloud cover, radiation budget and processes occurring in the oceans, on land, and
Moderate Resolution Imaging Spectroradiometer
Moderate_Resolution_Imaging_Spectroradiometer
Manned NASA spacecraft
of the Earth's surface proved unproductive, however, because of heavy cloud cover and bad photographic exposures. The public and political reaction was
Mercury-Atlas_8
Airport in Lukla, Nepal
Lukla while the sun is shining in Ramechhap or Kathmandu. High winds, cloud cover, and changing visibility often mean flights can be delayed or the airport
Tenzing-Hillary_Airport
Diagrammatic representation of Sun's position over a period of time
same time of day (disregarding daylight saving time and in as little cloud cover as possible). Although the term analemma usually refers to Earth's solar
Analemma
2020 helicopter accident in California
it was caused by continued VFR into IMC: the helicopter entered low cloud cover, which caused the pilot to lose his sense of orientation and thus lose
2020 Calabasas helicopter crash
2020_Calabasas_helicopter_crash
Type of weather map
of relevant quantities such as sea level pressure, temperature, and cloud cover onto a geographical map to help find synoptic scale features such as
Surface_weather_analysis
Persistent body of ice that moves downhill under its own weight
long-term climatic changes, e.g., precipitation, mean temperature, and cloud cover, glacial mass changes are considered among the most sensitive indicators
Glacier
Standardized weather observation code
00fff: N: total cloud cover in eighths of the sky (oktas); "0" for no clouds, "4" for half (4⁄8) of the sky obscured, "8" for total cloud cover, "9" for an
SYNOP
Geographical region of Asia and North America currently partly submerged
North America. Beringia received more moisture and intermittent maritime cloud cover from the north Pacific Ocean than the rest of the mammoth steppe, including
Beringia
The list of cloud types groups all genera as high (cirro-, cirrus), middle (alto-), multi-level (nimbo-, cumulo-, cumulus), and low (strato-, stratus)
List_of_cloud_types
angle), cloud cover, humidity, and other impurities. A simple formula gives the approximate level of direct insolation when there are no clouds: I D =
Direct_solar_irradiance
Type of black tea from India
sinensis variety were planted, but the sloped drainage, cool winters, and cloud cover favoured var. sinensis. The British established numerous tea plantations
Darjeeling_tea
LGA in Nasarawa State, Nigeria
month of the year in Karu. The average proportion of sky that is covered by clouds in Karu varies significantly seasonally throughout the year. In Karu
Karu,_Nasarawa_State
Illumination by reflected sunlight from a planet
can be used to show how the Earth's cloud cover varies over time. Preliminary results show a 6.5% dip in cloud cover between 1985 and 1997 and a corresponding
Planetshine
and nomenclature of clouds. cloud base The lowest altitude of the visible portion of a cloud. cloud bow See fogbow. cloud cover The obscuration of all
Glossary_of_meteorology
Management strategy for global warming
more than tropical climates, attributed to the effects of humidity and cloud cover. PDRC can be included in adaptive systems, switching from cooling to
Passive daytime radiative cooling
Passive_daytime_radiative_cooling
Invisible light source to identify a target
marked. Laser designators work best in clear atmospheric conditions. Cloud cover, rain or smoke can make reliable designation of targets difficult or
Laser_designator
Study of clouds and cloud formation
high solar activity lowers levels of cosmic rays, that in turn reduces cloud cover and warms the planet. Others say that there is no statistical evidence
Cloud formation and climate change
Cloud_formation_and_climate_change
Temperature as perceived by humans
available meteorological data that is reported (such as UV index and cloud cover). The Australian apparent temperature (AT), invented in the late 1970s
Apparent_temperature
Weather forecast service for astronomers
weather forecasts designed specifically for astronomers. They forecast the cloud cover, transparency and astronomical seeing, parameters which are not forecast
Clear_Sky_Chart
Weather phenomenon associated with rocketry
and weather conditions—typically, clear skies with no moonlight, since cloud cover would block one's view. The phenomenon can usually be seen throughout
Twilight_phenomenon
World War II landing operation in Europe
winds and heavy seas made it impossible to launch landing craft, and low cloud cover would prevent aircraft from finding their targets. The weather forecast
Normandy_landings
South-easterly wind in Western Cape, South Africa
Van Hunks and the Devil as it is the cause of the "table cloth," or cloud cover, on Table Mountain. Fremantle Doctor Southerly buster Backdoor cold front
Cape_Doctor
Highest altitude of the visible portion of a cloud
The cloud top (or the top of the cloud) is the highest altitude of the visible portion of a cloud. It is traditionally expressed either in metres above
Cloud_top
Cyclone with an associated cold pool of air at high altitude
Pacific or north Indian oceans, it is called a subtropical cyclone. Cloud cover and rainfall mainly occurs with these systems during the day. Severe
Cold-core_low
Catastrophic volcanic eruption in Indonesia in 1815
of nightly cloud cover and the evenings were cooler because the clouds had dissipated. There were documented fluctuations of cloud cover for various
1815 eruption of Mount Tambora
1815_eruption_of_Mount_Tambora
Mountain in Trinidad and Tobago
views are available. Its climate is subtropical. Due to constant fog and cloud cover, temperature may decrease significantly at night compared to the lowlands
El_Cerro_del_Aripo
Photograph of Earth taken by Apollo 17 crew
south polar ice cap, despite the Southern Hemisphere being heavily covered in clouds. In addition to the Arabian Peninsula and Madagascar, almost the entire
The_Blue_Marble
amount of cloud cover and by the altitude above sea level. These factors affect both UVA and UVB in nearly the same manner (less cloud cover or higher
Scientific Assessment of Ozone Depletion
Scientific_Assessment_of_Ozone_Depletion
Rainforest near Río Grande, Puerto Rico
at observation towers and platforms on summits, which, depending on cloud cover, offer panoramic views of not only the forest and the mountain subrange
El_Yunque_National_Forest
American aviator (1907–1995)
transatlantic flight was due to a navigational error, caused by heavy cloud cover that obscured landmarks and by misreading his compass in low-light conditions
Douglas_Corrigan
Unobstructed view upward from Earth
distant clouds or snowy mountaintops may appear yellow. The effect is not very obvious on clear days, but is very pronounced when clouds cover the line
Sky
2025 sub-orbital human spaceflight
attempts on June 21 and June 22 were scrubbed due to high winds and cloud cover, respectively. The mission lasted approximately 10 minutes, carrying
Blue_Origin_NS-33
Precipitation in the form of ice crystal flakes
assessment is where snow cover is patchy, for example during periods of accumulation or ablation and also in forested areas. Cloud cover inhibits optical sensing
Snow
Atmospheric phenomenon
An ice cloud is a colloid of ice particles dispersed in air. Cirrus and noctilucent clouds on Earth contain ice particles. On Earth, ice clouds are distributed
Ice_cloud
1985 aviation accident over the Pacific Ocean
the indicators to be faulty. Without any visual reference because of cloud cover and having rejected the information from the attitude indicators, the
China_Airlines_Flight_006
Cloud formation occurring at the base of a thunderstorm
A wall cloud (murus or pedestal cloud) is a large, localized, persistent, and often abrupt lowering of cloud that develops beneath the surrounding base
Wall_cloud
long-term climate changes, e.g., precipitation, mean temperature, and cloud cover, glacial mass changes are considered among the most sensitive indicators
List_of_glaciers
reveal seasonal variations in cloud cover. Over the course of Saturn's approximately 30-year orbit around the Sun, Titan's cloud systems appear to persist
Climate_of_Titan
LGA and town in Abia State, Nigeria
State. Over the course of the year, Osisioma's average percentage of cloud-covered sky varies significantly by season. In Osisioma, the clearer portion
Osisioma_Ngwa
2013 song by Yung Lean
leading to Lean's rise to fame and the wider popularization of cloud rap and later SoundCloud rap. In 2022, the song garnered renewed popularity through the
Ginseng_Strip_2002
Inhabited island in the Aleutian Islands, Alaska, United States
25th largest island in the United States. Due to harsh winds, frequent cloud cover, and cold temperatures, vegetation is mostly tundra (grasses, mosses
Adak_Island
Application of science and technology
barometric pressure, current weather conditions, and sky conditions or cloud cover, weather forecasting now relies on computer-based models that take many
Weather_forecasting
Area with air pressures lower than adjacent areas
month of the year globally. Atmospheric lift will also generally produce cloud cover through adiabatic cooling once the air temperature drops below the dew
Low-pressure_area
2012 aviation accident in Indonesia
system malfunction while their view was obstructed because of thick cloud cover. It was also established that in the minutes leading to the accident
2012 Mount Salak Sukhoi Superjet crash
2012_Mount_Salak_Sukhoi_Superjet_crash
Cloud induced or caused by human activity
A homogenitus, anthropogenic or artificial cloud is a cloud induced by human activity. Although most clouds covering the sky have a purely natural origin
Anthropogenic_cloud
Depictions of the planet
used as a setting in fiction since before the 19th century. Its opaque cloud cover gave science fiction writers free rein to speculate on conditions at
Venus_in_fiction
Dry wind in southeastern Australia
known as the Föhn gap can often be observed between the cloud wall and the arched cloud cover on the lee side of the Great Dividing Range. This type of
Southeast_Australian_foehn
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