martes, 3 de febrero de 2009
Physical geography
A ring of coastal mountains surrounds low central plains. The highest peak is Carrauntoohil (Irish: Corrán Tuathail) in County Kerry, which is 1,041 m (3,414 ft).[18][19] The River Shannon, at 386 km (240 miles) is the longest river in Ireland.[20][21] The island's lush vegetation, a product of its mild climate and frequent rainfall, earns it the sobriquet "Emerald Isle". The island's area is 84,412 km²[18] (32,591 square miles).
Ireland's least arable land lies in the south-western and western counties.[citation needed] These areas are largely mountainous and rocky, with green panoramic vistas.
Climate
Overall, Ireland has a mild, but changeable, Oceanic climate with few extremes. The warmest recorded air temperature was 33.3 °C (91.94 °F) at Kilkenny Castle, County Kilkenny on 26 June 1887, where as the lowest recorded temperature was −19.1 °C (−2.38 °F) at Markree Castle, County Sligo on 16 January 1881.[22]
Other statistics show that the greatest recorded annual rainfall was 3,964.9 mm (156.1 in) in the Ballaghbeena Gap in 1960. The driest year on record was 1887, with only 356.6 mm (14.0 in) of rain recorded at Glasnevin, while the longest period of absolute drought was in Limerick where there was no recorded rainfall over 38 days during April and May 1938.[23]
The climate is typically insular, and as a result of the moderating moist winds which ordinarily prevail from the South-Western Atlantic, it is temperate, avoiding the extremes in temperature of many other areas in the world at similar latitudes.[24]
Precipitation falls throughout the year, but is light overall, particularly in the east. The west, however, tends to be wetter on average and prone to the full force of Atlantic storms, more especially in the late autumn and winter months, which occasionally bring destructive winds and high rainfall totals to these areas, as well as snow and hail. The regions of North Galway and East Mayo have the highest incidents of recorded lightning annually (5 to 10 days per year).[23] Munster in the south records the least snow with Ulster in the north more prone to snow. Some areas along the south and southwest coasts have not had any lying snow since February 1991.[citation needed]
Inland areas are warmer in summer and colder in winter – there are usually around 40 days of below freezing temperatures (0 °C/32 °F) at inland weather stations, but only 10 days at coastal stations. Ireland is sometimes affected by heat waves, most recently in 1995, 2003, 2006.
Geology
Geologically the island consists of a number of provinces – in the far west around Galway and Donegal is a medium to high grade metamorphic and igneous complex of Caledonide (Scottish Highland) affinity. Across southeast Ulster and extending southwest to Longford and south to Navan is a province of Ordovician and Silurian rocks with more affinities with the Southern Uplands province of Scotland. Further south, there is an area along the Wexford coast of granite intrusives into more Ordovician and Silurian rocks with a more Welsh affinity.[25][26]
In the southwest, around Bantry Bay and the mountains of Macgillicuddy's Reeks, is an area of substantially deformed but only lightly metamorphosed Devonian-aged rocks.[27]
This partial ring of "hard rock" geology is covered by a blanket of Carboniferous limestone over the centre of the country, giving rise to the comparatively fertile and famously "lush" landscape of the country. The west coast district of The Burren around Lisdoonvarna has well developed karst features.[28] Elsewhere, significant stratiform lead-zinc mineralisation is found in the limestones (around Silvermines and Tynagh).
Hydrocarbon exploration is ongoing. The first major find was the Kinsale Head gas field off Cork/Cobh by Marathon Oil in the mid-1970s.[29][30] More recently, in 1999, Enterprise Oil announced the discovery of the Corrib Gas Field. This has increased activity off the west coast in parallel with the "West of Shetland" step-out development from the North Sea hydrocarbon province. The Helvick oil field, estimated to contain over 28 million barrels (4,500,000 m3) of oil, is another recent discovery.[31]
Wildlife
Ireland has fewer animal and plant species than either Britain or mainland Europe because it became an island shortly after the end of the last glacial period, about 10,000 years ago. Many different habitat types are found in Ireland, including farmland, open woodland, temperate broadleaf and mixed forests, conifer plantations, peat bogs, and various coastal habitats. According to the WWF, the territory of Ireland can be subdivided into two ecoregions: the Celtic broadleaf forests and North Atlantic moist mixed forests.
Fauna
Only 26 land mammal species are native to Ireland, because it was isolated from Europe by rising sea levels after the Ice Age. Some species, such as the red fox, hedgehog, and badger are very common, whereas others, like the Irish hare, red deer and pine marten are less so. Aquatic wild-life, such as species of turtle, shark, whale, and dolphin, are common off the coast. About 400 species of birds have been recorded in Ireland. Many of these are migratory, including the Barn Swallow. Most of Ireland's bird species come from Iceland, Greenland, Africa among other territories. There are no snakes in Ireland and only one reptile (the common lizard) is native to the country. Extinct species include the great Irish elk, the wolf, the great auk, and others. Some previously extinct birds, such as the Golden Eagle, have recently been reintroduced after decades of extirpation.
Agriculture drives current land use patterns in Ireland, limiting natural habitat preserves,[32] particularly for larger wild mammals with greater territorial needs. With no top predator in Ireland, populations of animals (such as semi-wild deer) that cannot be controlled by smaller predators (such as the fox) are controlled by annual culling.
Flora
Phytogeographically, Ireland belongs to the Atlantic European province of the Circumboreal Region within the Boreal Kingdom. Until mediæval times Ireland was heavily forested with oak, pine, beech and birch. Forests now cover about 9% (4,450 km² or one million acres) of the land.[33] Because of its mild climate, many species, including sub-tropical species such as palm trees, are grown in Ireland. Much of the land is now covered with pasture, and there are many species of wild-flower. Gorse (Ulex europaeus), a wild furze, is commonly found growing in the uplands, and ferns are plentiful in the more moist regions, especially in the western parts of Ireland. It is home to hundreds of plant species, some of them unique to the island. The country has been "invaded" by some grasses, such as Spartina anglica.[34]
The algal and seaweed flora is that of the cold-temperate. The total number of species is: 264 Rhodophyta; 152 Heterokontophyta; 114 Chloropyta; and 31 Cyanophyta, giving a total of 574. Rarer species include: Itonoa marginifera (J.Ag.) Masuda & Guiry); Schmitzia hiscockiana Maggs and Guiry; Gelidiella calcicola Maggs & Guiry; Gelidium maggsiae Rico & Guiry and Halymenia latifolia P.Crouan & H.Crouan ex Kützing.[35] The country has been invaded by some algae, some of which are now well established: Asparagopsis armara Harvey – which originated in Australia and was first recorded by M. De Valera in 1939; Colpomenia peregrina Sauvageau – now locally abundant and first recorded in the 1930s; Sargassum muticum (Yendo) Fensholt – now well established in a number of localities on the south, west, and north-east coasts; Codium fragile ssp. fragile (formerly reported as ssp. tomentosum) – now well established.[36] Codium fragile ssp. atlanticum has recently been established to be native, although for many years it was regarded as an alien species.
The impact of agriculture
The long history of agricultural production coupled with modern intensive agricultural methods (such as pesticide and fertiliser use) has placed pressure on biodiversity in Ireland.[citation needed] "Runoff" of contaminants into streams, rivers and lakes impact the natural fresh-water ecosystems. A land of green fields for crop cultivation and cattle rearing limits the space available for the establishment of native wild species. Hedgerows however, traditionally used for maintaining and demarcating land boundaries, act as a refuge for native wild flora. Their ecosystems stretch across the countryside and act as a network of connections to preserve remnants of the ecosystem that once covered the island. Subsidies under the Common Agricultural Policy which supported these agricultural practices are undergoing reforms.[37] The CAP still subsidises some potentially destructive agricultural practices, however, the recent reforms have gradually decoupled subsidies from production levels and introduced environmental and other requirements.[37]
Forest covers about 10% of the country, with most designated for commercial production.[32] Forested areas typically consist of monoculture plantations of non-native species which may result in habitats that are not suitable for supporting a broad range of native species of invertebrates. Remnants of native forest can be found scattered around the country, in particular in the Killarney National Park. Natural areas require fencing to prevent over-grazing by deer and sheep that roam over uncultivated areas. This is one of the main factors preventing the natural regeneration of forests across many regions of the country.[38History
| History of Ireland | |
| |
A long cold climatic spell prevailed until the end of the last glacial period about 9,000 years ago, and most of Ireland was covered with ice. Sea-levels were lower then, and Ireland, as with its neighbour Britain, rather than being islands, were part of a greater continental Europe. Mesolithic stone age inhabitants arrived some time after 8000 BC. Agriculture arrived with the Neolithic circa 4500 to 4000 BC, when sheep, goats, cattle and cereals were imported from southwest continental Europe. At the Céide Fields in County Mayo, an extensive Neolithic field system – arguably the oldest in the world[39] – has been preserved beneath a blanket of peat. Consisting of small fields separated from one another by dry-stone walls, the Céide Fields were farmed for several centuries between 3500 and 3000 BC. Wheat and barley were the principal crops.[40]
The Bronze Age, which began around 2500 BC, saw the production of elaborate gold as well as bronze ornaments, weapons and tools. The Iron Age in Ireland was supposedly associated with people known as Celts. They are traditionally thought to have colonised Ireland in a series of waves between the 8th and 1st centuries BC, with the Gaels, the last wave of Celts, conquering the island and dividing it into five or more kingdoms. Many scientists and academic scholars now favour a view that emphasises cultural diffusion from overseas over significant colonisation such as what Clonycavan Man was reported to be.[41][42]
The Romans referred to Ireland as Hibernia[43] and/or Scotia.[44] Ptolemy in AD 100 recorded Ireland's geography and tribes.[45] Native accounts are confined to Irish poetry, myth, and archaeology. The exact relationship between Rome and the tribes of Hibernia is unclear; the only references are a few Roman writings.
In early medieval times, a monarch (also known as the High King) presided over the (then five: the fifth being Meath) provinces of Ireland. These provinces too had their own kings, who were at least nominally subject to the monarch, who resided at Tara. The written judicial system was the Brehon Law, and it was administered by professional learned jurists who were known as the Brehons.
According to early medieval chronicles, in 431, Bishop Palladius arrived in Ireland on a mission from Pope Celestine I to minister to the Irish "already believing in Christ." The same chronicles record that Saint Patrick, Ireland's patron saint, arrived in 432. There is continued debate over the missions of Palladius and Patrick, but the general consensus is that they both existed.[46]
The druid tradition collapsed in the face of the spread of the new religion.[47] Irish Christian scholars excelled in the study of Latin and Greek learning and Christian theology in the monasteries that flourished, preserving Latin and Greek learning during the Early Middle Ages.[47][48] The arts of manuscript illumination, metalworking, and sculpture flourished and produced such treasures as the Book of Kells, ornate jewellery, and the many carved stone crosses that dot the island. From the 9th century, waves of Viking raiders plundered monasteries and towns, adding to a pattern of endemic raiding and warfare. Eventually Vikings settled in Ireland, and established many towns, including the modern day cities of Dublin, Cork, Limerick and Waterford.
| Chronological | |
|---|---|
| Timeline | |
| Prehistoric and Early Ireland (before 400CE) | |
| Early Christian Ireland (400–800) | |
| Early medieval era (800–1168) | |
| Norman Ireland (1169–1536) | |
| Early modern era (1536–1691) | |
| Protestant Ascendancy (1691–1801) | |
| Union with Britain (1801–1922) | |
| Republic (1919–present) | |
| Northern Ireland (1921–present) | |
| Topical | |
| Battles · Tribes · States | |
| Gaelic monarchs · British monarchs | |
| Economic history | |
| Irish language | |
| |
A long cold climatic spell prevailed until the end of the last glacial period about 9,000 years ago, and most of Ireland was covered with ice. Sea-levels were lower then, and Ireland, as with its neighbour Britain, rather than being islands, were part of a greater continental Europe. Mesolithic stone age inhabitants arrived some time after 8000 BC. Agriculture arrived with the Neolithic circa 4500 to 4000 BC, when sheep, goats, cattle and cereals were imported from southwest continental Europe. At the Céide Fields in County Mayo, an extensive Neolithic field system – arguably the oldest in the world[39] – has been preserved beneath a blanket of peat. Consisting of small fields separated from one another by dry-stone walls, the Céide Fields were farmed for several centuries between 3500 and 3000 BC. Wheat and barley were the principal crops.[40]
The Bronze Age, which began around 2500 BC, saw the production of elaborate gold as well as bronze ornaments, weapons and tools. The Iron Age in Ireland was supposedly associated with people known as Celts. They are traditionally thought to have colonised Ireland in a series of waves between the 8th and 1st centuries BC, with the Gaels, the last wave of Celts, conquering the island and dividing it into five or more kingdoms. Many scientists and academic scholars now favour a view that emphasises cultural diffusion from overseas over significant colonisation such as what Clonycavan Man was reported to be.[41][42]
The Romans referred to Ireland as Hibernia[43] and/or Scotia.[44] Ptolemy in AD 100 recorded Ireland's geography and tribes.[45] Native accounts are confined to Irish poetry, myth, and archaeology. The exact relationship between Rome and the tribes of Hibernia is unclear; the only references are a few Roman writings.
In early medieval times, a monarch (also known as the High King) presided over the (then five: the fifth being Meath) provinces of Ireland. These provinces too had their own kings, who were at least nominally subject to the monarch, who resided at Tara. The written judicial system was the Brehon Law, and it was administered by professional learned jurists who were known as the Brehons.
According to early medieval chronicles, in 431, Bishop Palladius arrived in Ireland on a mission from Pope Celestine I to minister to the Irish "already believing in Christ." The same chronicles record that Saint Patrick, Ireland's patron saint, arrived in 432. There is continued debate over the missions of Palladius and Patrick, but the general consensus is that they both existed.[46]
The druid tradition collapsed in the face of the spread of the new religion.[47] Irish Christian scholars excelled in the study of Latin and Greek learning and Christian theology in the monasteries that flourished, preserving Latin and Greek learning during the Early Middle Ages.[47][48] The arts of manuscript illumination, metalworking, and sculpture flourished and produced such treasures as the Book of Kells, ornate jewellery, and the many carved stone crosses that dot the island. From the 9th century, waves of Viking raiders plundered monasteries and towns, adding to a pattern of endemic raiding and warfare. Eventually Vikings settled in Ireland, and established many towns, including the modern day cities of Dublin, Cork, Limerick and Waterford.
From 1169, Ireland was entered by Cambro-Norman warlords, led by Richard de Clare, 2nd Earl of Pembroke (Strongbow),[49] on an invitation from the then King of Leinster. In 1171, King Henry II of England came to Ireland, using the 1155 Bull Laudabiliter issued to him by then Pope Adrian IV, to claim sovereignty over the island, and forced the Cambro-Norman warlords and some of the Gaelic Irish kings to accept him as their overlord. From the 13th century, English law began to be introduced. By the late 13th century the Norman-Irish had established the feudal system throughout most of lowland Ireland. Their settlement was characterised by the establishment of baronies, manors, towns and large land-owning monastic communities, and the county system. The towns of Dublin, Cork, Wexford, Waterford, Limerick, Galway, New Ross, Kilkenny, Carlingford, Drogheda, Sligo, Athenry, Arklow, Buttevant, Carlow, Carrick-on-Suir, Cashel, Clonmel, Dundalk, Enniscorthy, Kildare, Kinsale, Mullingar, Naas, Navan, Nenagh, Thurles, Wicklow, Trim and Youghal were all under Norman-Irish control.
In the 14th century the English settlement went into a period of decline and large areas, for example Sligo, were re-occupied by Gaelic septs. The medieval English presence in Ireland (The Pale) was deeply shaken by the Black Death, which arrived in Ireland in 1348.[50] From the late 15th century English rule was once again expanded, first through the efforts of the Earls of Kildare and Ormond then through the activities of the Tudor State under Henry VIII and Mary and Elizabeth. This resulted in the complete conquest of Ireland by 1603 and the final collapse of the Gaelic social and political superstructure at the end of the 17th century, as a result of English and Scottish Protestant colonisation in the Plantations of Ireland, and the Wars of the Three Kingdoms and the Williamite War in Ireland. Approximately 600,000 people, nearly half the Irish population, died during the Cromwellian conquest of Ireland.[51]
After the Irish Rebellion of 1641, Irish Catholics and nonconforming Protestants were barred from voting or attending the Irish Parliament. Under the penal laws (introduced from 1691) no Irish Catholic could sit in the Parliament of Ireland, even though some 90% of Ireland's population was native Irish Catholic. This ban was followed by others in 1703 and 1709 as part of a comprehensive system disadvantaging the Catholic community, and to a lesser extent, Protestant dissenters.[52] The new English Protestant ruling class was known as the Protestant Ascendancy. Towards the end of the 18th century the (entirely Protestant) Irish Parliament attained a greater degree of independence from the British Parliament than it had previously held.
In 1798, many members of the Protestant dissenter tradition made common cause with Catholics in a rebellion inspired and led by the Society of United Irishmen. It was staged with the aim of creating a fully independent Ireland as a state with a republican constitution. Despite assistance from France the Irish Rebellion of 1798 was put down by British forces.
In 1800, the British and subsequently the Irish Parliament passed the Act of Union which, in 1801, merged the Kingdom of Ireland and the Kingdom of Great Britain to create the United Kingdom of Great Britain and Ireland. The passage of the Act in the Irish Parliament was achieved with substantial majorities, in part (according to contemporary documents) through bribery, namely the awarding of peerages and honours to critics to get their votes.[53] Thus, Ireland became part of an extended United Kingdom, ruled directly by the UK Parliament in London.
The total area of the United Kingdom is approximately 245,000 square kilometres (94,600 sq mi) comprising of the island of Great Britain, the northeastern one-sixth of the island of Ireland (Northern Ireland) and smaller islands.[9] It lies between the North Atlantic Ocean and the North Sea, coming within 35 kilometres (22 mi) of the northwest coast of France, from which it is separated by the English Channel.[9] Great Britain lies between latitudes 49° and 59° N (the Shetland Islands reach to nearly 61° N), and longitudes 8° W to 2° E. The Royal Greenwich Observatory, near London, is the defining point of the Prime Meridian. When measured directly north-south, Great Britain is a little over 1,100 kilometres (700 mi) in length and is a fraction under 500 kilometres (300 mi) at its widest, but the greatest distance between two points is 1,350 kilometres (840 mi) between Land's End in Cornwall (near Penzance) and John o' Groats in Caithness (near Thurso). Northern Ireland shares a 360-kilometre (224 mi) land boundary with the Republic of Ireland.[9]
The United Kingdom has a temperate climate, with plentiful rainfall all year round.[9] The temperature varies with the seasons but seldom drops below −10 °C (14.0 °F) or rises above 35 °C (95 °F). The prevailing wind is from the southwest, bearing frequent spells of mild and wet weather from the Atlantic Ocean.[9] Eastern parts are most sheltered from this wind and are therefore the driest. Atlantic currents, warmed by the Gulf Stream, bring mild winters, especially in the west, where winters are wet, especially over high ground. Summers are warmest in the south east of England, being closest to the European mainland, and coolest in the north. Snowfall can occur in winter and early spring, though it rarely settles to great depth away from high ground.
England accounts for just over half of the total area of the UK, covering 130,410 square kilometres (50,350 sq mi). Most of the country consists of lowland terrain, with mountainous terrain north-west of the Tees-Exe line including the Cumbrian Mountains of the Lake District, the Pennines and limestone hills of the Peak District, Exmoor and Dartmoor. The main rivers and estuaries are the Thames, Severn and the Humber. England's highest mountain is Scafell Pike, which is in the Lake District 978 metres (3,209 ft). England has a number of large towns and cities, including six of the top 50 Larger Urban Zones in the European Union.
Scotland accounts for about a third of the total area of the UK, covering 78,772 square kilometres (30,410 sq mi),[85] including nearly eight hundred islands, mainly west and north of the mainland, notably the Hebrides, Orkney Islands and Shetland Islands. The topography of Scotland is distinguished by the Highland Boundary Fault – a geological rock fracture – which traverses the Scottish mainland from Helensburgh to Stonehaven. The faultline separates two distinctively different regions; namely the Highlands to the north and west and the lowlands to the south and east. The more rugged Highland region contains the majority of Scotland's mountainous terrain, including Ben Nevis, which at 1,343 metres (4,406 ft) is the highest point in the British Isles.[86] Lowland areas, especially the narrow waist of land between the Firth of Clyde and the Firth of Forth known as the Central Belt, are flatter and home to most of the population including Glasgow, Scotland's largest city, and Edinburgh, the capital and political centre of the country.
Wales accounts for less than a tenth of the total area of the UK, covering 20,758 square kilometres (8,010 sq mi). Wales is mostly mountainous, though south Wales is less mountainous than north and mid Wales. The main population and industrial areas are in south Wales, consisting of the coastal cities of Cardiff (the capital, political and economic centre), Swansea and Newport and the South Wales Valleys to their north. The highest mountains in Wales are in Snowdonia, and include Snowdon (Welsh: Yr Wyddfa), which, at 1,085 m (3,560 ft) is the highest peak in Wales. The 14 (or possibly 15) Welsh mountains over 3,000 feet (914 m) high are known collectively as the Welsh 3000s. Wales has over 1,200 km (750 miles) of coastline. There are several islands off the Welsh mainland, the largest of which is Anglesey (Ynys Môn) in the northwest.
Northern Ireland accounts for just 14,160 square kilometres (5,470 sq mi) and is mostly hilly. It includes Lough Neagh, at 388 square kilometres (150 sq mi), the largest body of water in the UK and Ireland.[87] The highest peak in Northern Ireland is Slieve Donard at 849 metres (2,785 ft) in the Mourne Mountains.
united kingdom
The United Kingdom of Great Britain and Northern Ireland,[13] commonly known as the United Kingdom, the UK or Britain,[14] is a sovereign state located off the northwestern coast of continental Europe. It is an island country,[15][16] spanning Great Britain, the northeast part of Ireland, and many small islands. Northern Ireland is the only part of the UK with a land border, sharing it with the Republic of Ireland.[17][18] Apart from this land border, the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel and the Irish Sea. The largest island, Great Britain, is linked to France by the Channel Tunnel.
The United Kingdom is a unitary state consisting of four countries: England, Northern Ireland, Scotland and Wales.[19] It is governed by a parliamentary system with its seat of government in London, the capital, but with three devolved national administrations in Belfast, Cardiff and Edinburgh, the capitals of Northern Ireland, Wales and Scotland respectively. The UK is a constitutional monarchy with Queen Elizabeth II as the head of state. The Channel Islands and the Isle of Man are Crown Dependencies and not part of the UK, but form a federacy with it.[20] The UK has fourteen overseas territories,[21] all remnants of the British Empire, which at its height in 1922 encompassed almost a quarter of the world's land surface, the largest empire in history. British influence can continue to be observed in the language, culture and legal systems of many of its former colonies. Queen Elizabeth II remains the head of the Commonwealth of Nations and head of state of each of the Commonwealth realms.
The UK is a developed country, with the fifth (nominal GDP) or sixth (PPP) largest economy in the world. It was the world's first industrialised country[22] and the world's foremost power during the 19th and early 20th centuries,[23] but the economic cost of two world wars and the decline of its empire in the latter half of the 20th century diminished its leading role in global affairs. The UK nevertheless remains a major power with strong economic, cultural, military and political influence worldwide. It is a nuclear power and has the second or third highest defence spending in the world. It is a Member State of the European Union, holds a permanent seat on the United Nations Security Council, and is a member of the G8, NATO, Organisation for Economic Co-operation and Development, World Trade Organisation and the Commonwealth of Nations.
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