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 particular location.[2] Okta is the usual unit for measurement of the cloud cover. The cloud cover is correlated to the sunshine duration as the least cloudy locales are the sunniest ones while the cloudiest areas are the least sunny places, as clouds can block sunlight, especially at sunrise and sunset where sunlight is already limited.
The global cloud cover averages around 67-68%, though it ranges from 56% to 73% depending on the minimum optical depth considered (lower when optical depth is large, and higher when it is low, such that subvisible cirrus clouds are counted).[3] Average cloud cover is around 72% over the oceans, with low seasonal variation, and about 55% above land, with significant seasonal variation.[4]
Cloud Cover Movie Free Download Hd
Download File 🔥 https://byltly.com/2yg6nM 🔥
Clouds play multiple critical roles in the climate system and diurnal cycle. In particular, being bright objects in the visible part of the solar spectrum, they efficiently reflect light to space and thus contribute to the cooling of the planet, as well as trapping remaining heat at night. Cloud cover thus plays an important role in the energetic balance of the atmosphere and a variation of it is a factor and consequence of and to the climate change expected by recent studies.[5]
Cloud cover values only vary by 3% from year to year averages, whereas the local, day to day variability in cloud amount typically rises to 30% over the globe. Most data sets agree on the fact that the land is covered by 10-15% less cloud than the oceans. This is due to the seas being covered with water, meaning much more evaporation is possible.[3]
On a continental scale, it can be noticed based upon a long-term satellite recording of cloudiness data that on a year-mean basis, Europe, North America, South America and Asia are dominated by cloudy skies due to the westerlies, monsoon or other effects. On the other hand, Africa, the Middle East and Australia are dominated by clear skies due to their continentality and aridity.[8]
On a regional scale, some exceptionally humid areas of Earth experience cloudy conditions virtually all time such as South America's Amazon Rainforest while some highly arid areas experience clear-sky conditions virtually all the time such as Africa's Sahara Desert.[8]
A total solar eclipse will occur Monday, April 8, 2024, stretching from south central Texas through the Ohio Valley and then into the New England. Here is the latest forecast information regarding expected cloud cover, in relationship to the path of totality and partial eclipse. These will be updated daily around 1130 am MDT.
CloudCover is our registered trademark in the United States, EU, UK, Oceania, India and China.
All rights are reserved exclusive to CloudCover, including affiliates, divisions and its subsidiaries. cloudcover .
The Cloud Cover offers a transformative experience in softness. Its distinctive blend of high-density memory foam and down alternative fibers mimics the sensation of lying atop a gentle cloud, offering unparalleled coziness and tranquility.
In the 1930s, the National Weather Service standardized codes for cloud forms and cloud cover according to the international system of classification. From there, charts were created describing this state of the sky.
The NWS Cloud Chart is a picture of the state of the sky, displaying both individual clouds and combinations of clouds. This helps provide a picture of the state of the atmosphere at the time of observation.
For example, an overcast layer of stratus (St) clouds mean the atmosphere is stable, implying little change in the current conditions for the next few hours. Cirrostratus (Cs) clouds increasing in sky coverage and thickness implies a change from fair weather to possibly rainy or snowy conditions.
Some cloud classifications on the Cloud Chart represent the same cloud type in different stages of development or amounts of sky cover. For example, cumulus (Cu) clouds of little vertical extent are classified as a 'Low 1' but are classified as 'Low 2' if there is moderate vertical growth. A cumulonimbus (Cb) without a visible anvil is classified 'Low 3' but with an anvil, it is classified as 'Low 9'.
One thing to remember, clouds are identified based upon the elevation of the observation point. From sea-level, altocumulus clouds might be observed over the top of a mountain. However, from that mountain top, an observation of the same cloud would likely report as stratocumulus. Therefore, two observers looking at the same cloud can often report different cloud classifications.
The exception to this is cumulus or cumulonimbus clouds over a mountain. Even though these low-level clouds typically have bases under 6,500 feet (2,000 meters) above ground level, when observed over a mountain top, their base might be 12,000 feet (3,600 meters) or higher relative to the ground level. However, the base of those clouds would be well within 6,500 feet (2,000 meters) above their location over the mountain. Therefore they would still be called cumulus or cumulonimbus clouds even when seen from the ground.
In the United States today, the 27 cloud symbols are no longer plotted on surface maps. Weather observations became computerized in the 1990s, and these automated observing systems can only detect cloud height, not cloud type. However, weather observations by humans continue in most of the world and include the 'state of the sky' using these symbols.
A total solar eclipse is coming up for parts of Mexico, Canada, and the United States on the afternoon of 8 April 2024. This page aggregates the latest data from various weather models and ensembles for cloud cover and precipitation forecasts for the time of the eclipse. Click on any of the pages below to view the latest data!
I don't know if there is a list but I'm sure your local weather service will give you some idea. Cloud cover could have a big effect of course. But it will be the same as it is for any day or night. Total overcast will allow you to notice the darkness only. Just use your common sense on what cloud cover you deem too risky for travel.
There is an internet site: which is supposedly developed by astronomers to help determine viewing conditions. Just input a latitude and longitude and it gives you info related to viewing conditions. Different days are on the left after the local forecast. Click the triangle in the lower right of the date and it gives you a detailed forecast for the location you entered. This includes predicted cloud cover by the hour.
In preparation for the Aug 1999 total solar eclipse, I travelled to a friend's house in Honiton, Devon (south coast UK), the day before the eclipse. We were deciding the best place to visit to view the eclipse. That evening I checked the satellite imagery on the internet and saw that clouds were coming in from the west and so the best chance would be to go as far east as possible while remaining in the path of totality. So I checked the online map and Torbay seemed a good place. Luckily, we were travelling almost due south and this worked out very well because the roads were clear - everyone was travelling east to Cornwall. Although it was cloudy, there were frequent gaps and we got some great clear views of Baily's beads including the corona during totality. In Cornwall, they saw nothing - it was a complete white-out for the entire eclipse. I was one of the very few who actually got to see it in the UK. Ok, we were lucky in some regards, but performing the cloud/wind direction checks was essential in our case.
What are the underlying mechanisms explaining the interplay between clouds and tree canopies? Forests have larger net radiation and surface roughness than open lands, favouring a better exchange of heat, moisture and momentum with the atmosphere, which in turn can generate a stronger convection and a deeper ABL44,45. The co-occurrence of an effective lifting mechanism (provided by the sensible heat flux) and sufficient water vapour (provided by the latent heat flux) support the generation of convective clouds in the lower troposphere31. Furthermore, research suggests that, thanks to a feedback between cloud generation and its subsequent effect on the incoming radiation, forests tend to foster the establishment of an equilibrium between the temperature and moisture tendencies ensuring that these cloud-forming conditions endure46. Cloud formation is further affected by several other vegetation properties such as the access to deep soil water47, landscape fragmentation48,49 and even by the emissions of biogenic volatile organic compounds (BVOCs)50. BVOCs are complex molecules that plants (and trees in particular) produce to regulate various processes such as plant growth, reproduction and defence, but they also rapidly oxidize in the atmosphere into secondary organic aerosols that can grow into cloud condensation nuclei51. The complexity of these multiple processes affecting the interplay between forests and cloud formation partly explains why observational evidence on the impact of land use can disagree in magnitude and sign depending on the season and the region of the world under investigation31,49,52.
In this study we make a global-scale observational assessment of where afforestation could lead to an increased cloud formation by exploiting satellite data products. Our study shows that afforestation generally leads to an increase in low cloud cover over most of the world, and predominantly in the warmer months of the years. These results are comforted by a series of ancillary analyses using either an alternative methodology, a finer scale dataset or even ground-based observations. We further found that different types of forests can have stronger effects on low-level cloud formation. We expect this work to serve as a valuable observational benchmark for climate models, which should improve our general understanding of the Earth System, and also to guide the design of ambitious nature-based mitigation policies such as the European Green Deal. 589ccfa754
Knoll Unmult After Effects Cc 19