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Brown Willy Effect
The Brown Willy effect is a particular example of a meteorological phenomenon known as peninsular convergence, which sometimes occurs in the south-west of Great Britain. It leads to heavy showers developing over the high ground of Bodmin Moor in Cornwall, which then often travel a considerable distance downwind of their place of origin. The effect is named after the hill, Brown Willy, the highest point on the moor and in Cornwall as a whole. It is thought that the Boscastle flood of 2004 was caused by a particularly extreme example. Cause Cornwall lies in the path of prevailing mild, moist westerly or south-westerly winds that blow in from the Atlantic Ocean. As these hit land, they are slowed by the effect of friction. Winds near the south coast tend to be diverted to a more northerly direction (backed), this creates a convergence zone near the central/northern spine of the peninsula, leading to uplift and condensation of the moisture borne by them. The uplift is intensified by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Willy
Brown Willy (possibly meaning "hill of swallows" or meaning "highest hill") is a hill in Cornwall, England, United Kingdom. The summit, at above sea level, is the highest point of Bodmin Moor and of Cornwall as a whole. It is about northwest of Bolventor and southeast of Camelford. The hill has a variable appearance that depends on the vantage point from which it is seen. It bears the conical appearance of a sugarloaf from the north but widens into a long multi-peaked crest from closer range. Toponymy The first part of the hill's name is a common Brythonic element meaning "breast, pap; hill-side, slope, breast (of hill)", which is frequent in Welsh placenames. The Cornish historian and language expert Henry Jenner suggested that the name came from a corruption of the Cornish words ''bronn ughella/ewhella'' meaning "highest hill", as it is the highest point of Bodmin Moor and of Cornwall. The highest hill in Devon has the similar name, High Willhays which falls in line with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe and Asia from the "New World" of the Americas in the European perception of the World. The Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Europe and Africa to the east, and North and South America to the west. As one component of the interconnected World Ocean, it is connected in the north to the Arctic Ocean, to the Pacific Ocean in the southwest, the Indian Ocean in the southeast, and the Southern Ocean in the south (other definitions describe the Atlantic as extending southward to Antarctica). The Atlantic Ocean is divided in two parts, by the Equatorial Counter Current, with the North(ern) Atlantic Ocean and the South(ern) Atlantic Ocean split at about 8°N. Scientific explorations of the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puget Sound Convergence Zone
The Puget Sound Convergence Zone (PSCZ) is a meteorological phenomenon that occurs over Puget Sound in the U.S. state of Washington. It is formed when the large-scale air flow splits around the Olympic Mountains and then converges over Puget Sound. This convergence zone generally occurs between north Seattle and Everett and can cause updrafts and convection, which leads to a narrow band of precipitation. A second, weaker convergence zone can occur between approximately Victoria, British Columbia, and Bellingham, Washington, over the San Juan Islands, as a result of southwesterly air blowing from the Strait of Juan de Fuca meeting northerly air moving southward down the Strait of Georgia. The National Weather Service publishes special reports, forecasts, and graphical analyses for the PSCZ region. Most common locations Puget Sound Convergence Zones, variable in both location and strength, tend to form in the general vicinity of central and southern Snohomish and northern King co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pembrokeshire Dangler
The Pembrokeshire Dangler is a convergence zone which forms a line of continuous showers aligned north-south across the Irish Sea; often as snow occurring during late autumn and winter, since the environmental factors required for its formation such as warm sea temperatures and cold Arctic air aloft are usually only met at this time of year. It is initiated as a northerly flow is forced between the Rhins of Galloway and the Antrim Plateau. This is then augmented by land breeze effects producing winds blowing from east of north off England and Wales and from west of north off Ireland; these winds then converge down the length of the Irish Sea. As the convergence line spawns deep convection cells, they flow over progressively warmer waters creating further instability and prime conditions for prolonged convection across Pembrokeshire, Cornwall and west Devon. On 25 November 2005 the Pembrokeshire Dangler gave of snow across Bodmin Moor and across parts of northwest Devon, particul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burford, Oxfordshire
Burford () is a town on the River Windrush, in the Cotswold hills, in the West Oxfordshire district of Oxfordshire, England. It is often referred to as the 'gateway' to the Cotswolds. Burford is located west of Oxford and southeast of Cheltenham, about from the Gloucestershire boundary. The toponym derives from the Old English words ''burh'' meaning fortified town or hilltown and ''ford'', the crossing of a river. The 2011 Census recorded the population of Burford parish as 1,422. Economic and social history The town began in the middle Saxon period with the founding of a village near the site of the modern priory building. This settlement continued in use until just after the Norman conquest of England when the new town of Burford was built. On the site of the old village a hospital was founded which remained open until the Dissolution of the Monasteries by King Henry VIII. The modern priory building was constructed some 40 years later, in around 1580. The town centre's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackdown Hills
The Blackdown Hills are a range of hills along the Somerset-Devon border in south-western England, which were designated an Area of Outstanding Natural Beauty (AONB) in 1991. The plateau is dominated by hard chert bands of Upper Greensand with some remnants of chalk, and is cut through by river valleys. The hills support an extensive range of wildlife leading to the designation of 16 Sites of Special Scientific Interest (SSSIs). There is evidence of human occupation since the Iron Age. Fortifications include the remains of ancient hill forts, Norman architecture, Norman motte-and-bailey castles and Second World War airfields. There are also religious buildings such as Dunkeswell Abbey and village churches. The hills are crossed by a network of minor roads with major transport routes including the M5 motorway running around the periphery. Natural region The Blackdowns form a natural region that has been designated as a national character area - No. 147 - by Natural Eng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dartmoor
Dartmoor is an upland area in southern Devon, England. The moorland and surrounding land has been protected by National Park status since 1951. Dartmoor National Park covers . The granite which forms the uplands dates from the Carboniferous Period of geological history. The landscape consists of moorland capped with many exposed granite hilltops known as tors, providing habitats for Dartmoor wildlife. The highest point is High Willhays, above sea level. The entire area is rich in antiquities and archaeology. Dartmoor National Park is managed by the Dartmoor National Park Authority, whose 22 members are drawn from Devon County Council, local district councils and Government. Parts of Dartmoor have been used as military firing ranges for over 200 years. The public is granted extensive land access rights on Dartmoor (including restricted access to the firing ranges) and it is a popular tourist destination. Physical geography Geology Dartmoor includes the largest area of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convection
Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convection is unspecified, convection due to the effects of thermal expansion and buoyancy can be assumed. Convection may also take place in soft solids or mixtures where particles can flow. Convective flow may be transient (such as when a multiphase mixture of oil and water separates) or steady state (see Convection cell). The convection may be due to gravitational, electromagnetic or fictitious body forces. Heat transfer by natural convection plays a role in the structure of Earth's atmosphere, its oceans, and its mantle. Discrete convective cells in the atmosphere can be identified by clouds, with stronger convection resulting in thunderstorms. Natural convection also plays a role in stellar physics. Convection is often categorised or d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Breeze
A sea breeze or onshore breeze is any wind that blows from a large body of water toward or onto a landmass; it develops due to differences in air pressure created by the differing heat capacities of water and dry land. As such, sea breezes are more localised than prevailing winds. Because land heats up much faster than water under solar radiation, a sea breeze is a common occurrence along coasts after sunrise. By contrast, a land breeze or offshore breeze is the reverse effect: dry land also cools more quickly than water and, after sunset, a sea breeze dissipates and the wind instead flows from the land towards the sea. Sea breezes and land breezes are both important factors in coastal regions' prevailing winds. The term offshore wind may refer to any wind over open water. Wind farms are often situated near a coast to take advantage of the normal daily fluctuations of wind speed resulting from sea or land breezes. While many onshore wind farms and offshore wind farms do not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Financial Times
The ''Financial Times'' (''FT'') is a British daily newspaper printed in broadsheet and published digitally that focuses on business and economic current affairs. Based in London, England, the paper is owned by a Japanese holding company, Nikkei, with core editorial offices across Britain, the United States and continental Europe. In July 2015, Pearson sold the publication to Nikkei for £844 million (US$1.32 billion) after owning it since 1957. In 2019, it reported one million paying subscriptions, three-quarters of which were digital subscriptions. The newspaper has a prominent focus on financial journalism and economic analysis over generalist reporting, drawing both criticism and acclaim. The daily sponsors an annual book award and publishes a " Person of the Year" feature. The paper was founded in January 1888 as the ''London Financial Guide'' before rebranding a month later as the ''Financial Times''. It was first circulated around metropolitan London by James Sherida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteorology
Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not begin until the 18th century. The 19th century saw modest progress in the field after weather observation networks were formed across broad regions. Prior attempts at prediction of weather depended on historical data. It was not until after the elucidation of the laws of physics, and more particularly in the latter half of the 20th century the development of the computer (allowing for the automated solution of a great many modelling equations) that significant breakthroughs in weather forecasting were achieved. An important branch of weather forecasting is marine weather forecasting as it relates to maritime and coastal safety, in which weather effects also include atmospheric interactions with large bodies of water. Meteorological pheno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boscastle Flood Of 2004
The 2004 Boscastle flood ( kw, An Lanwes Kastel Boterel 2004) occurred on Monday, 16 August 2004 in the two villages of Boscastle and Crackington Haven in Cornwall, England, United Kingdom. The villages suffered extensive damage after flash floods caused by an exceptional amount of rain that fell over eight hours that afternoon. The flood in Boscastle was filmed and extensively reported but the floods in Crackington Haven and Rocky Valley were not mentioned beyond the local news. The floods were the worst in local memory. A study commissioned by the Environment Agency from hydraulics consulting firm HR Wallingford concluded that it was among the most extreme ever experienced in Britain. The peak flow was about 140 m3/s, between 5:00 pm and 6:00 pm BST. The annual chance of this (or a greater) flood in any one year is about 1 in 400. The probability each year of the heaviest three-hour rainfall is about 1 in 1300 (although rainfall probability is not the same as flood ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
