Geography
[edit]
Satellite image of the Madeira archipelago by the Copernicus Sentinel-2 stellite, with Porto Santo on the top right, Madeira island on the center, and the Desertas islands at the bottom, with the Chão islet at the top and Deserta Grande island at the bottom. The Bugio Island and the Savage islands are not represented.
The Madeira archipelago is located 520 km (280 nmi) from the African coast, 805 km (430 nmi) from the closest point in the European coast (the Portuguese town of Sagres, in Algarve) and 1,000 km (540 nmi) from the capital of Portugal, Lisbon (approximately a one-and-a-half-hour flight). Madeira inhabits the extreme south of the Madeira-Tore Rise, a bathymetric structure oriented along a north-northeast to south-southwest axis that extends for 1,000 kilometres (540 nmi). This structure consists of long geomorphological relief that extends from the abyssal plain to 3,500 m (11,500 ft); its highest submerged point reaches a depth of about 150 m (490 ft) (around latitude 36°N). The origins of the Madeira-Tore Rise are not clearly established, but may have resulted from a buckling of the lithosphere.
Islands and islets[edit]
Madeira (740.7 km2 or 286 sq mi), including Ilhéu de Agostinho, Ilhéu de São Lourenço, Ilhéu Mole (northwest); Total population: 262,456 (2011 Census).
Porto Santo (42.5 km2 or 16.4 sq mi), including Ilhéu de Baixo ou da Cal, Ilhéu de Ferro, Ilhéu das Cenouras, Ilhéu de Fora, Ilhéu de Cima; Total population: 5,483 (2011 Census).
Desertas Islands (14.2 km2 or 5.5 sq mi), including the three uninhabited islands: Deserta Grande Island, Bugio Island and Ilhéu de Chão.
Savage Islands (3.6 km2 or 1.4 sq mi), archipelago 280 km south-southeast of Madeira Island including three main uninhabited islands and 16 islets in two groups: the Northeast Group (Selvagem Grande Island, Ilhéu de Palheiro da Terra, Ilhéu de Palheiro do Mar) and the Southwest Group (Selvagem Pequena Island, Ilhéu Grande, Ilhéu Sul, Ilhéu Pequeno, Ilhéu Fora, Ilhéu Alto, Ilhéu Comprido, Ilhéu Redondo, Ilhéu Norte).
Comprehensive map of Madeira's main island
Comprehensive map of Madeira's outlying island of Porto Santo
Map of the Ilhas Desertas
Map of the Ilhas Selvagens
Peaks[edit]
Sights from Balcões showing Madeira's high orography
The ten tallest peaks in Madeira exemplify the island's diverse topography. Pico Ruivo is the highest at 1,862 metres (6,109 ft). Madeira's mountaintops offer vistas of rugged terrain and the Atlantic Ocean and attract hikers and nature enthusiasts.
Rank
Peak Name
m
ft
1.
Pico Ruivo
1862
6109
2.
Pico das Torres
1847
6060
3.
Pico do Areeiro
1818
5965
4.
Pico do Cidrão
1801
5909
5.
Pico do Gato
1780
5840
6.
Pico Grande
1655
5430
7.
Pico Ruivo do Paul da Serra
1649
5410
8.
Queimadas
1500
4921
9.
Pico do Serradinho
1436
4711
10.
Chao dos Terreiros
1436
4711
Madeira Island[edit]
Main article: Madeira Island
Seamounts of the Northeastern Atlantic between Madeira and continental Portugal with the Madeira archipelago on the bottom left corner
Satellite view of the island of Madeira by the Copernicus Sentinel-2 satellite. The image shows that deep green laurel forest (laurissilva) survives intact on the steep northern slopes of the island, but in the south, where terrain is gentler, the terracotta colour of towns and the light green colour of agriculture are more dominant.
Madeira Island is at the top of a massive shield volcano that rises about 6 km (20,000 ft) from the floor of the Atlantic Ocean, on the Tore underwater mountain range. The volcano formed atop an east–west rift in the oceanic crust along the African Plate, beginning during the Miocene epoch (5 million years ago), continuing into the Pleistocene (700,000 years ago). This was followed by extensive erosion, producing two large amphitheatres opening southward in the central part of the island. Volcanic activity later resumed, producing scoria cones and lava flows atop the eroded shield. The most recent volcanic eruptions were on the west-central part of the island 6,500 years ago, creating more cinder cones and lava flows.
It is the largest island of the group with an area of 741 km2 (286 sq mi), a length of 57 km (35 mi) (from Ponte de São Lourenço to Ponta do Pargo). It is approximately 22 km (14 mi) at its widest point (from Ponta da Cruz to Ponta de São Jorge), with a coastline of 150 km (90 mi). It has a mountain ridge that extends along the centre of the island, reaching 1,862 metres (6,109 feet) at its highest point (Pico Ruivo), staying below 200 metres along its eastern extent. The primitive volcanic foci responsible for the central mountainous area consisted of the peaks: Ruivo (1,862 m), Torres (1,851 m), Arieiro (1,818 m), Cidrão (1,802 m), Cedro (1,759 m), Casado (1,725 m), Grande (1,657 m), Ferreiro (1,582 m). At the end of this eruptive phase, reefs encircled the island, and its marine vestiges are evident in a calcareous layer at Lameiros, in São Vicente. Sea cliffs, such as Cabo Girão, valleys and ravines extend from this central spine, leaving the interior generally inaccessible. Daily life is concentrated in the many villages at the mouths of the ravines, through which the heavy autumn and winter rains travel to the sea.
Climate[edit]
Madeira has many different bioclimates. Based on differences in sun exposure, humidity, and annual mean temperature, clear variations distinguish north- and south-facing regions, as well as some islands. The islands are strongly influenced by the Gulf Stream and Canary Current, giving it mild to warm year-round temperatures. According to the Instituto de Meteorologia (IPMA), the average annual temperature at Funchal weather station is 19.6 °C (67.3 °F) for the 1981–2010 period. Relief is a determinant factor on precipitation levels; areas such as the Madeira Natural Park can get as much as 2,800 mm (110 in) of precipitation a year. Madeira hosts lush laurel forests, while Porto Santo, a much flatter island, has a semiarid climate (BSh). In most winters, snowfall occurs in the mountains.
Climate data for Funchal Observatory, 1991-2020, altitude: 58 m (190 ft)
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Record high °C (°F)
25.6(78.1)
28.6(83.5)
30.5(86.9)
32.6(90.7)
34.2(93.6)
33.9(93.0)
37.7(99.9)
38.2(100.8)
34.3(93.7)
34.3(93.7)
29.5(85.1)
27.1(80.8)
38.2(100.8)
Mean daily maximum °C (°F)
20.0(68.0)
19.9(67.8)
20.6(69.1)
21.0(69.8)
22.0(71.6)
23.7(74.7)
25.4(77.7)
26.8(80.2)
26.6(79.9)
25.2(77.4)
22.8(73.0)
21.0(69.8)
22.9(73.2)
Daily mean °C (°F)
17.1(62.8)
16.8(62.2)
17.4(63.3)
17.9(64.2)
19.1(66.4)
20.9(69.6)
22.6(72.7)
23.7(74.7)
23.5(74.3)
22.2(72.0)
19.9(67.8)
18.3(64.9)
20.0(67.9)
Mean daily minimum °C (°F)
14.3(57.7)
13.9(57.0)
14.3(57.7)
14.9(58.8)
16.2(61.2)
18.2(64.8)
19.7(67.5)
20.7(69.3)
20.4(68.7)
19.2(66.6)
17.0(62.6)
15.5(59.9)
17.0(62.7)
Record low °C (°F)
9.2(48.6)
8.7(47.7)
8.5(47.3)
11.1(52.0)
9.7(49.5)
14.5(58.1)
16.3(61.3)
17.5(63.5)
17.9(64.2)
13.5(56.3)
11.2(52.2)
11.0(51.8)
8.5(47.3)
Average precipitation mm (inches)
67.1(2.64)
72.4(2.85)
62.3(2.45)
45.2(1.78)
27.2(1.07)
7.8(0.31)
1.7(0.07)
1.3(0.05)
23.1(0.91)
91.2(3.59)
80.3(3.16)
94.8(3.73)
574.4(22.61)
Average rainy days (≥ 1 mm)
6.2
5.5
5.8
4.7
3.3
1.0
0.3
0.4
3.1
7.0
7.3
8.6
53.2
Average relative humidity (%)
71
70
68
68
70
73
73
72
71
71
70
70
71
Mean monthly sunshine hours
160.9
166.8
197.7
194.8
208.6
194.0
232.5
236.7
210.8
194.3
165.9
151.1
2,314.1
Percentage possible sunshine
50
54
53
50
48
45
55
57
57
55
53
49
52
Average ultraviolet index
4.0
5.9
8.0
9.7
10.4
11.0
10.8
10.1
8.6
7.2
4.7
3.4
7.8
Source 1: Instituto Português do Mar e da Atmosfera (average daily max UV recorded in 2015-2020)
Source 2: NOAA (humidity 1961–1990), German Meteorological Service (sunshine 1991-2020)
Biodiversity[edit]
See also: Madeira evergreen forests
Endemic plant and animal species[edit]
In the south, little is left of the indigenous subtropical rainforest that once covered the island[citation needed] (the original settlers set fires to clear the land for farming) and named it (madeira means "wood" in Portuguese). However, in the north, the valleys harbor native trees. These laurisilva forests, notably those on the northern slopes, are designated as a UNESCO World Heritage Site. Madeira's paleobotanical record reveals that laurissilva forest has existed for at least 1.8 million years. Critically endangered species such as the vine Jasminum azoricum and the rowan Sorbus maderensis are endemic. The Madeiran large white butterfly was an endemic subspecies of the large white that inhabited the laurissilva forests but has not been seen since 1977.
See also: List of endemic plants of Madeira
Madeiran wall lizard[edit]
These paragraphs are an excerpt from Madeiran wall lizard.[edit]
The Madeiran wall lizard (Teira dugesii), being the only species in the genus Teira, is a species of lizard in the family Lacertidae with four recognized subspecies. The species is endemic to the Madeira Archipelago, Portugal. In the Azores, this lizard has become naturalized after an involuntary introduction by the shipping trade between the two archipelagos. The species is both endemic and common, ranging from sea coasts to altitudes of 1,850 metres (6,070 ft).
Madeiran wolf spider[edit]
Hogna ingens, the Deserta Grande wolf spider, is endemic to the Madeira archipelago, specifically Deserta Grande Island. It is critically endangered. It is considered the largest member of its family. Restoration efforts are underway.
Birds[edit]
See also: List of birds of Madeira
Three species of birds are endemic to Madeira: the Trocaz pigeon, the Madeira chaffinch and the Madeira firecrest. In addition extinct species include the Madeiran scops owl, two rail species, Rallus adolfocaesaris and R. lowei, and two quail species, Coturnix lignorum and C. alabrevis, and the Madeiran wood pigeon, a subspecies of the common wood pigeon and which was last seen in the early 20th century.
A great auk bone is known from the Selvagens, suggesting this seabird visited at least sporadically.
Mice[edit]
Madeira is home to six distinct chromosomal varieties of house mice, believed to be descendants of common European house mice brought to the island by Vikings in the 9th century (or conceivably by 15th-century Portuguese settlers), but diversified to the point where at least some likely cannot interbreed with their continental relatives or with one another. They have essentially the same genes, but rearranged to give different chromosome numbers: the ancestral species has 40 chromosomes, whereas the Madeira populations have from 22 to 30. The deep valleys of Madeira are separated by high ground, and the different lineages of mice do not encounter each other.
Levadas[edit]
This section is an excerpt from Levada (Madeira).[edit]
Levada to the trout farm (Viveiros de Trutas), Ribeiro Frio, São Roque do Faial
A levada is an irrigation channel or aqueduct specific to the Portuguese Atlantic region of Madeira. Madeira island is wet in the northwest, but dry in the southeast. In the 16th century the Portuguese started building levadas (aqueducts) to carry water to the agricultural regions in the south. Due to the island's mountainous landscape, building levadas promised to be a difficult venture, often tasked to criminals and convicts from continental Portugal. Many are cut into the mountainsides, accompanied by 40 km (25 mi) of tunnels, some of which are still accessible.
Today levadas supply water and also provide hydro-electric power. Over 2,170 km (1,350 mi) of levadas were built and later provided a network of walking paths. Paths can provide easy and relaxing walks through the countryside, while others are narrow, crumbling ledges where a slip could result in injury or death. Some improvements have been made to these pathways following the 2010 Madeira floods and mudslides. Such improvements involved the continuous maintenance of streams, paving trails, and establishing safety fences on dangerous stretches.