Geography of Trinidad and Tobago

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Geography of Trinidad and Tobago
Trinidad Topography.png
Region Caribbean
Coordinates 11°00′N61°00′W / 11.000°N 61.000°W / 11.000; -61.000
Area
  Total5,128 km2 (1,980 sq mi)
Coastline362 km (225 mi)
Highest point El Cerro del Aripo
940 m
Map of Trinidad and Tobago Td-map.gif
Map of Trinidad and Tobago

Trinidad and Tobago is an archipelagic republic in the southern Caribbean between the Caribbean Sea and the North Atlantic Ocean, northeast of Venezuela. They are southeasterly islands of the Lesser Antilles, Monos, Huevos, Gaspar Grande (or Gasparee), Little Tobago, and St. Giles Island. Trinidad is 11 km (6.8 mi) off the northeast coast of Venezuela and 130 km (81 mi) south of the Grenadines.[ citation needed ] The island measures 4,768 km2 (1,841 sq mi) in area (comprising 93.0% of the country's total area) with an average length of 80 km (50 mi) and an average width of 59 km (37 mi).[ citation needed ] The island appears rectangular in shape with three projecting peninsular corners. [1] Tobago is 30 km (19 mi) northeast of Trinidad and measures about 298 km2 (115 sq mi) in area, or 5.8% of the country's area, 41 km (25.5 mi) in length and 12 km (7.5 mi) at its greatest width.[ citation needed ] The island is cigar-shaped in appearance, with a northeast–southwest alignment.

Contents

Physical geography

Trinidad is traversed by three distinct mountain ranges that are a continuation of the Venezuelan coastal cordillera. [1] The Northern Range, an outlier of the Andes Mountains of Venezuela, consists of rugged hills that parallel the coast. [1] This range rises into two peaks. [1] The highest, El Cerro del Aripo, is 940 metres (3,084 ft) high; the other, El Tucuche, reaches 936 metres (3,071 ft). [1] The Central Range extends diagonally across the island and is a low-lying range with swampy areas rising to rolling hills; its maximum elevation is 325 metres (1,066 ft). [1] The Caroni Plain, composed of alluvial sediment, extends southward, separating the Northern Range and Central Range. [1] The Southern Range consists of a broken line of hills with a maximum elevation of 305 metres (1,001 ft). [1]

There are numerous rivers and streams on the island of Trinidad; the most significant are the Ortoire River, 50 kilometres (31.1 mi) long, which extends eastward into the Atlantic, and the 40-kilometre (24.9 mi)-long Caroni River, reaching westward into the Gulf of Paria. [1] Most of the soils of Trinidad are fertile, with the exception of the sandy and unstable terrain found in the southern part of the island. [1]

Tobago is mountainous and dominated by the Main Ridge, which is 29 kilometres (18 mi) long with elevations up to 550 meters. [1] There are deep, fertile valleys running north and south of the Main Ridge. [1] The southwestern tip of the island has a coral platform. [1] Although Tobago is volcanic in origin, there are no active volcanoes. [1] Forestation covers 43% of the island. [1] There are numerous rivers and streams, but flooding and erosion are less severe than in Trinidad. [1] The coastline is indented with numerous bays, beaches, and narrow coastal plains. [1]

Tobago has several small satellite islands. [1] The largest of these, Little Tobago, is starfish shaped, hilly, and 1.2 km2 (0.46 sq mi). [1]

Because it was once part of continental South America, Trinidad has an assortment of tropical vegetation and wildlife considerably more varied than that of most Caribbean islands. [1] Tobago has a generally similar but less varied assortment. [1]

Geology

Geologically, the islands are not part of the Lesser Antilles Volcanic Arc. [1] Rather, Trinidad was once part of the South American mainland and is situated on its continental shelf, and Tobago is part of a sunken island arc chain related to the Pacific-derived Caribbean Plate. [1] The islands are separated from the continent of South America by the Gulf of Paria; Bocas del Dragón, a 19-kilometre (11.8 mi)-wide northern passage; and Serpent's Mouth, a 14-kilometre (8.7 mi)-wide southern passage. [1]

The Northern Range consists mainly of Upper Jurassic and Cretaceous metamorphic rocks. [2] The Northern Lowlands (East–West Corridor and Caroni Plains) consist of younger shallow marine clastic sediments.[ citation needed ] South of this, the Central Range fold and thrust belt consists of Cretaceous and Eocene sedimentary rocks, with Miocene formations along the southern and eastern flanks.[ citation needed ] The Naparima Plains and the Nariva Swamp form the southern shoulder of this uplift.[ citation needed ]

The Southern Lowlands consist of Miocene and Pliocene sands, clays, and gravels.[ citation needed ] These overlie oil and natural gas deposits, especially north of the Los Bajos Fault.[ citation needed ] The Southern Range forms the third anticlinal uplift.[ citation needed ] It consists of several chains of hills, most famous being the Trinity Hills.[ citation needed ] The rocks consist of sandstones, shales, siltstones and clays formed in the Miocene and uplifted in the Pleistocene.[ citation needed ] Oil sands and mud volcanoes are especially common in this area.[ citation needed ]

Political geography

Regional corporations and municipalities of Trinidad and Tobago Regional corporations and municipalities of Trinidad and Tobago.svg
Regional corporations and municipalities of Trinidad and Tobago

Trinidad is split into 14 regional corporations and municipalities, consisting of 9 regions and 5 municipalities, which have a limited level of autonomy.[ citation needed ] The various councils are made up of a mixture of elected and appointed members. Elections are due to be held every three years with the last elections held in 2019.[ citation needed ] The island of Tobago is administered by the Tobago House of Assembly.[ citation needed ]

Climate

Koppen climate map of the islands of the West Indies, with the climate of Trinidad and Tobago visible in the southeast corner. Koppen-Geiger Map Caribbean present.svg
Köppen climate map of the islands of the West Indies, with the climate of Trinidad and Tobago visible in the southeast corner.

The country lies in the tropics, enjoying a generally pleasant maritime tropical climate influenced by the northeast trade winds. [1] In Trinidad the annual mean temperature is 26 °C (78.8 °F), and the average maximum temperature is 34 °C (93.2 °F). [1] The highest temperature ever was 37.8 degrees Celsius. The lowest (coldest felt) temperature recorded in Trinidad was 16.1 °C (61.0 °F) in January 1964.[ citation needed ] The humidity is high, particularly during the rainy season, when it averages 85 to 87%. [1] The island receives an average of 2,110 millimeters (83.1 in) of rainfall per year, usually concentrated in the months of June through December, when brief, intense showers frequently occur. [1] Precipitation is highest in the Northern Range, which may receive as much as 3,810 millimeters (150 in). [1] During the dry season, drought plagues the island's central interior. [1] Tobago's climate is similar to Trinidad's but slightly cooler. [1] Its rainy season extends from June to December; the annual rainfall is 2,500 millimeters (98.4 in). [1] The islands lie outside the hurricane belt; [1] [3] despite this, Hurricane Flora damaged Tobago in 1963. The hurricane killed 18 people on Tobago and caused $30:million in crop and property damages (1963 USD). [4] Tropical Storm Alma hit Trinidad in 1974, causing damage before reaching full strength. [1] Wind gusts reached 91 mph (147 km/h) at the Savonette gas field during the storm. [5]

Climate data for Port of Spain
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)33.2
(91.8)
33.0
(91.4)
34.9
(94.8)
34.9
(94.8)
35.3
(95.5)
34.4
(93.9)
33.5
(92.3)
34.2
(93.6)
37.0
(98.6)
35.5
(95.9)
33.8
(92.8)
33.2
(91.8)
37.0
(98.6)
Mean daily maximum °C (°F)28.0
(82.4)
28.9
(84.0)
30.3
(86.5)
31.0
(87.8)
33.1
(91.6)
31.5
(88.7)
31.3
(88.3)
31.7
(89.1)
32.2
(90.0)
32.2
(90.0)
31.5
(88.7)
31.1
(88.0)
31.1
(87.9)
Mean daily minimum °C (°F)17.0
(62.6)
19.2
(66.6)
20.7
(69.3)
22.0
(71.6)
23.0
(73.4)
23.3
(73.9)
23.0
(73.4)
23.0
(73.4)
23.1
(73.6)
22.6
(72.7)
22.3
(72.1)
21.0
(69.8)
21.7
(71.0)
Record low °C (°F)14.6
(58.3)
16.1
(61.0)
16.7
(62.1)
17.2
(63.0)
18.9
(66.0)
19.7
(67.5)
18.3
(64.9)
18.9
(66.0)
19.4
(66.9)
19.4
(66.9)
17.9
(64.2)
15.7
(60.3)
14.6
(58.3)
Average rainfall mm (inches)42.9
(1.69)
39.8
(1.57)
16.9
(0.67)
27.7
(1.09)
67.5
(2.66)
155.6
(6.13)
193.6
(7.62)
244.0
(9.61)
190.5
(7.50)
143.3
(5.64)
210.5
(8.29)
75.7
(2.98)
1,408
(55.43)
Average rainy days (≥ 0.1 mm)1110661120211916151813166
Average relative humidity (%)81807777798484848485868482
Mean monthly sunshine hours 241.3231.3248.3237.5233.2183.7205.9212.5197.1207.4197.7214.52,610.4
Source 1: World Meteorological Organization [6]
Source 2: NOAA (sun, extremes and humidity) [7]
Climate data for Scarborough, Tobago
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)29
(85)
30
(86)
31
(87)
31
(88)
31
(88)
31
(87)
30
(86)
31
(87)
31
(87)
31
(87)
30
(86)
29
(85)
30
(86)
Mean daily minimum °C (°F)22
(72)
22
(72)
23
(73)
24
(75)
24
(76)
24
(76)
24
(75)
24
(75)
24
(75)
24
(75)
23
(74)
23
(73)
23
(74)
Average precipitation mm (inches)48
(1.9)
48
(1.9)
43
(1.7)
46
(1.8)
64
(2.5)
150
(5.8)
190
(7.4)
160
(6.4)
170
(6.7)
220
(8.7)
210
(8.1)
160
(6.3)
1,505
(59.27)
Source: Weatherbase [8]
Climate data for San Fernando
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)29.3
(84.7)
29.7
(85.5)
30.3
(86.5)
31.2
(88.2)
31.0
(87.8)
30.2
(86.4)
30.1
(86.2)
30.6
(87.1)
31.1
(88.0)
30.9
(87.6)
30.6
(87.1)
29.8
(85.6)
30.4
(86.7)
Daily mean °C (°F)25.0
(77.0)
25.0
(77.0)
25.6
(78.1)
26.5
(79.7)
26.9
(80.4)
26.3
(79.3)
26.2
(79.2)
26.4
(79.5)
26.7
(80.1)
26.6
(79.9)
26.3
(79.3)
25.5
(77.9)
26.1
(79.0)
Mean daily minimum °C (°F)20.7
(69.3)
20.4
(68.7)
20.9
(69.6)
21.8
(71.2)
22.8
(73.0)
22.5
(72.5)
22.4
(72.3)
22.3
(72.1)
22.4
(72.3)
22.4
(72.3)
22.0
(71.6)
21.2
(70.2)
21.8
(71.3)
Average rainfall mm (inches)77
(3.0)
42
(1.7)
43
(1.7)
56
(2.2)
84
(3.3)
193
(7.6)
214
(8.4)
235
(9.3)
182
(7.2)
157
(6.2)
184
(7.2)
132
(5.2)
1,599
(63)
Source: Climate-data.org [9]

Statistics

Trinidad and Tobago (orthographic projection).svg
Enlargeable comprehensive map TrinidadAndTobago2021OSM.png
Enlargeable comprehensive map

Area:
total: 5,128 km2 [3]
land: 5,128 km2 [3]
water: negligible [3]

Coastline: 362 km [3]

Maritime claims:
contiguous zone:24  nmi (44.4 km; 27.6 mi) [3]
continental shelf:200 nmi (370.4 km; 230.2 mi) or to the outer edge of the continental margin [3]
exclusive economic zone:200 nmi (370.4 km; 230.2 mi) [3]
territorial sea:12 nmi (22.2 km; 13.8 mi) [3]

Terrain: mostly plains with some hills and low mountains [3]

Extreme points:

Northernmost point: Marble Island, Tobago [ citation needed ]

Southernmost point: Icacos, Siparia region, Trinidad Island [ citation needed ]

Westernmost point: Icacos, Siparia region, Trinidad Island [ citation needed ]

Easternmost point: Easternmost tip of Little Tobago, Tobago [ citation needed ]

Lowest point: Caribbean Sea 0 m[ citation needed ]

Highest point: El Cerro del Aripo, Trinidad 940 m[ citation needed ]

Natural resources: petroleum, natural gas, asphalt [3]

Land use:
arable land: 4.9%
permanent crops: 4.3%

permanent pasture: 1.4%

forest: 44%
other: 45.4% (2018 est.) [3]

Irrigated land: 70 km2 (2012) [3]

Total renewable water resources: 3.84 billion m³ (2017) [3]

See also

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<span class="mw-page-title-main">Northern Range</span>

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<span class="mw-page-title-main">Caroni River (Trinidad and Tobago)</span> River in Trinidad and Tobago

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<span class="mw-page-title-main">Outline of Trinidad and Tobago</span> Overview of and topical guide to Trinidad and Tobago

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<span class="mw-page-title-main">Caroni Plain</span>

On the island of Trinidad in the Republic of Trinidad and Tobago, the Caroni Plain is a lowland area between the Northern Range and the Central Range. The lowland areas to the south of the Central Range are the Naparima Plain on the west and the Nariva Plain on the east. The lowland areas are either flat or consist of gently rolling hills. The 25-mile long Caroni river flows westward through the Caroni Plain and drains into the Caroni Swamp on the Gulf of Paria coast. The Caroni Plain was a major region of sugar and cocoa production in the 18th and 19th centuries and the first half of the 20th century.

<span class="mw-page-title-main">Trinidad and Tobago moist forests</span>

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References

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  2. Paleogeographic Evolution and Non-Glacial Eustacy, Northern South America. SEPM (Society for Sedimentary Geology). 1998. doi:10.2110/pec.98.58.0087. ISBN   978-1-56576-041-7. S2CID   131385286.
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  5. Tropical Cyclones Affecting Trinidad and Tobago 1725-2000 (PDF) (Report). Trinidad and Tobago Meteorological Service via the Internet Wayback Machine. 2002-05-02. Archived from the original on December 23, 2005. Retrieved 2011-10-13.{{cite report}}: CS1 maint: unfit URL (link)
  6. "World Weather Information Service–Port of Spain". World Meteorological Organization. Retrieved 10 December 2013.
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  8. "Weatherbase: Historical Weather for Scarborough, Trinidad and Tobago". Weatherbase. 2013. Retrieved on April 15, 2013.
  9. "San Fernando climate". Climate-data.org. Retrieved February 29, 2020.