Geography of the Bahamas
From Wikipedia, the free encyclopedia
The Bahamas are a group of about 700 islands and cays in the western Atlantic Ocean, of which only between 30 and 40 are inhabited. The largest of the islands is Andros Island, located north of Cuba and 200 kilometres (120 miles) southeast of Florida. The Bimini islands are to its northwest. To the North is the island of Grand Bahama, home to the second-largest city in the country, Freeport. The island of Great Abaco is to its east. In the far south is the island of Great Inagua, the second-largest island in the country. Other notable islands include Eleuthera, Cat Island, San Salvador Island, Acklins, Crooked Island, and Mayaguana. Nassau is the capital and largest city, located on New Providence. The islands have a tropical savannah climate, moderated by the Gulf Stream. The total size is 13,878 km2 (5,358 sq mi). Due to the many widespread islands it has the 41st largest Exclusive Economic Zone of 654,715 km2 (252,787 sq mi).
 | |
| Continent | North America |
|---|---|
| Region | Atlantic Ocean |
| Coordinates | 24°15′N 76°00′W |
| Area | Ranked 155th |
| • Total | 13,878 km2 (5,358 sq mi) |
| • Land | 72.12% |
| • Water | 27.88% |
| Coastline | 3,542 km (2,201 mi) |
| Borders | None |
| Highest point | Cat Island 63 metres (207 ft) |
| Lowest point | Atlantic Ocean 0 m |
| Exclusive economic zone | 654,715 km2 (252,787 sq mi) |
The islands are surface projections of two oceanic Bahama Banks - the Little Bahama Bank and the Great Bahama Bank.[1] The highest point is only 63 metres (207 feet) above sea level on Cat Island; the island of New Providence, where the capital city of Nassau is located, reaches a maximum elevation of only thirty-seven meters. The land on the Bahamas has a foundation of fossil coral, but much of the rock is oolitic limestone; the stone is derived from the disintegration of coral reefs and seashells.[1] The land is primarily either rocky or mangrove swamp.[1] Low scrub covers much of the surface area.[1] Pineyards are found on four of the northern islands: Grand Bahama, Great Abaco, New Providence, and Andros.[1] On some of the southern islands, low-growing tropical hardwood flourishes.[1] Although some soil is very fertile, it is also very thin.[1] Only a few freshwater lakes and just one river, located on Andros Island, are found in the Bahamas.[1]
| Precipitation | Storm | Location | Ref. | ||
|---|---|---|---|---|---|
| Rank | mm | in | |||
| 1 | 747.5 | 29.43 | Noel 2007 | Long Island | [2] |
| 2 | 580.1 | 22.84 | Dorian 2019 | Hope Town | [3] |
| 3 | 500.3 | 19.70 | Matthew 2016 | Matthew Town, Inagua | [4] |
| 4 | 436.6 | 17.19 | Flora 1963 | Duncan Town | [5] |
| 5 | 390.1 | 15.36 | Inez 1966 | Nassau Airport | [5] |
| 6 | 337.1 | 13.27 | Fox 1952 | New Providence | [5] |
| 7 | 321.1 | 12.64 | Michelle 2001 | Nassau | [6] |
| 8 | 309.4 | 12.18 | Erin 1995 | Church Grove | [7] |
| 9 | 260.0 | 9.88 | Fay 2008 | Freeport | [8] |
| 10 | 236.7 | 9.32 | Floyd 1999 | Little Harbor Abacos | [9] |
The climate of the Bahama islands is mostly tropical savanna, with two seasons, a hot and wet summer (wet season) and dry winter (dry season).
During the wet season, which extends from May through October, the climate is dominated by warm, moist tropical air masses[1] as the Bermuda High brings a southeasterly flow from the deep tropics. Daily high temperatures are in the 31 °C (87.8 °F) range, with a dew point temperatures in the 75–77 °F (23.9–25.0 °C) range, creating the typical hot and sultry island weather. Brief but intense thundershowers are common with thunder and lightning. In the wet season, tropical storms and weak tropical lows may also contribute to the seasonal rainfall.
In the dry season, extending from November through April, the subtropical high retreats, and a mix of drier northeast trade winds and occasional westerlies coming down from the North American mainland impact the Bahamas. Sunny, arid conditions prevail in the Bahamas in the dry season, and at times drought conditions can impact farming and agriculture. High temperatures during the dry season are in the 25 °C (77.0 °F) range.
Annual rainfall averages 132 centimetres (52 in) and is usually concentrated in the May–June and September–October periods.[1] Rainfall often occurs in short-lived, fairly intense, but brief thundershowers accompanied by strong gusty winds, followed by a return to clear skies.[1]
Winds are predominantly easterly throughout the year but tend to become northeasterly from October to April and southeasterly from May to September.[1] These winds seldom exceed twenty-four kilometres per hour except during hurricane season.[1] Although the hurricane season officially lasts from June to November, most hurricanes in the Bahamas occur between July and October.[1] The strongest storm to strike the country was Hurricane Andrew in 1992, until Hurricane Dorian struck in 2019. Damage was estimated at US$250 million and mainly affected agricultural products.
The most intense hurricane to strike the Bahamas was Hurricane Dorian in 2019, with wind gusts of up to 355 kilometres per hour (221 mph) being recorded. 84 people died (74 of which were from the Bahamas), and there was catastrophic damage to buildings, homes, and boats, and sometimes complete destruction. Preliminary damage estimates are in the US$7 billion range.[10]
| Climate data for Nassau (Lynden Pindling International Airport), elevation: 7 m or 23 ft, extremes 1980-2012 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 32.1 (89.8) |
33.0 (91.4) |
33.0 (91.4) |
34.0 (93.2) |
38.0 (100.4) |
38.0 (100.4) |
36.0 (96.8) |
39.9 (103.8) |
36.0 (96.8) |
35.0 (95.0) |
33.0 (91.4) |
32.0 (89.6) |
39.9 (103.8) |
| Mean daily maximum °C (°F) | 25.6 (78.1) |
26.1 (79.0) |
26.9 (80.4) |
28.1 (82.6) |
29.9 (85.8) |
31.4 (88.5) |
32.4 (90.3) |
32.4 (90.3) |
31.9 (89.4) |
30.2 (86.4) |
27.9 (82.2) |
26.4 (79.5) |
29.1 (84.4) |
| Daily mean °C (°F) | 21.6 (70.9) |
21.9 (71.4) |
22.7 (72.9) |
23.9 (75.0) |
25.8 (78.4) |
27.7 (81.9) |
28.5 (83.3) |
28.5 (83.3) |
27.9 (82.2) |
26.6 (79.9) |
24.5 (76.1) |
22.6 (72.7) |
25.2 (77.4) |
| Mean daily minimum °C (°F) | 17.4 (63.3) |
17.9 (64.2) |
18.6 (65.5) |
19.8 (67.6) |
21.6 (70.9) |
23.6 (74.5) |
24.4 (75.9) |
24.4 (75.9) |
24.1 (75.4) |
23.0 (73.4) |
20.9 (69.6) |
18.9 (66.0) |
21.2 (70.2) |
| Record low °C (°F) | 6.0 (42.8) |
7.0 (44.6) |
7.0 (44.6) |
9.0 (48.2) |
9.0 (48.2) |
15.0 (59.0) |
17.0 (62.6) |
18.0 (64.4) |
18.0 (64.4) |
15.0 (59.0) |
11.0 (51.8) |
7.6 (45.7) |
6.0 (42.8) |
| Average precipitation mm (inches) | 49 (1.9) |
50 (2.0) |
65 (2.6) |
63 (2.5) |
115 (4.5) |
223 (8.8) |
150 (5.9) |
217 (8.5) |
182 (7.2) |
137 (5.4) |
79 (3.1) |
52 (2.0) |
1,382 (54.4) |
| Average precipitation days (≥ 1.0 mm) | 8 | 6 | 7 | 6 | 10 | 15 | 17 | 18 | 17 | 14 | 9 | 8 | 135 |
| Mean monthly sunshine hours | 226 | 224 | 251 | 282 | 282 | 240 | 267 | 260 | 222 | 236 | 219 | 211 | 2,920 |
| Source 1: Ogimet[11] | |||||||||||||
| Source 2: Climatebase.ru (extremes)[12] | |||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 73 °F
23 °C |
73 °F
23 °C |
75 °F
24 °C |
79 °F
26 °C |
81 °F
27 °C |
82 °F
28 °C |
82 °F
28 °C |
82 °F
28 °C |
82 °F
28 °C |
81 °F
27 °C |
79 °F
26 °C |
75 °F
24 °C |
| Climate data for Freeport (1971-2000) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 24.3 (75.8) |
24.4 (75.9) |
25.8 (78.4) |
27.4 (81.3) |
29.7 (85.4) |
31.2 (88.2) |
32.2 (90.0) |
32.3 (90.2) |
31.7 (89.0) |
29.7 (85.4) |
27.3 (81.2) |
25.1 (77.2) |
28.4 (83.2) |
| Mean daily minimum °C (°F) | 15.9 (60.7) |
15.6 (60.0) |
17.5 (63.5) |
19.2 (66.6) |
21.1 (69.9) |
23.2 (73.8) |
23.9 (75.1) |
23.9 (75.1) |
23.3 (74.0) |
21.4 (70.5) |
19.4 (66.9) |
17.0 (62.6) |
20.1 (68.2) |
| Average precipitation mm (inches) | 83.1 (3.27) |
72.6 (2.86) |
93.5 (3.68) |
66.8 (2.63) |
104.7 (4.12) |
176.0 (6.93) |
165.4 (6.51) |
207.8 (8.18) |
217.4 (8.56) |
142.8 (5.62) |
93.0 (3.66) |
73.7 (2.90) |
1,496.8 (58.92) |
| Average rainy days | 10 | 9 | 9 | 7 | 12 | 17 | 18 | 19 | 19 | 16 | 11 | 10 | 157 |
| Mean monthly sunshine hours | 217 | 226 | 279 | 270 | 279 | 270 | 279 | 279 | 240 | 248 | 210 | 217 | 3,014 |
| Mean daily sunshine hours | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 7 | 7 | 8 |
| Percent possible sunshine | 65 | 71 | 75 | 70 | 67 | 65 | 66 | 69 | 65 | 70 | 65 | 67 | 68 |
| Average ultraviolet index | 5 | 7 | 9 | 10 | 11 | 11 | 11 | 11 | 10 | 8 | 6 | 5 | 9 |
| Source 1: WMO [13] | |||||||||||||
| Source 2: Weather Atlas (rain days, sun, and uv)[14] | |||||||||||||
 |
Location
Atlantic Ocean, chain islands in the North Atlantic Ocean, southeast of Florida, northeast of Cuba and northwest of the Turks and Caicos Islands.
Geographic coordinates (capital city Nassau): 25°4′N 77°20′W
Area
- total: 13,880 km2
- county comparison to the world: 161
- land: 3865 square miles; 10,010 km2
- water: 3,870 km2
Area comparative
- Australia comparative: 6 times larger than the Australian Capital Territory
- Canada comparative: a little over twice the size of Prince Edward Island
- Poland comparative: slightly smaller than Świętokrzyskie Voivodeship
- United Kingdom comparative: slightly smaller than Northern Ireland
- United States comparative: slightly smaller than Connecticut
- France comparative: slightly larger than Île-de-France
- The Philippines comparative: slightly larger than Ilocos Region
- Germany comparative: slightly smaller than Schleswig-Holstein
- Russia comparative: slightly smaller than Karachay-Cherkess Republic
- Indonesia comparative: slightly smaller than North Sulawesi
- Ivory Coast comparative: slightly smaller than Comoé District
Land
Natural resources
Land use
- arable land: 0.8%
- permanent crops: 0.04%
- other: 98.8% (2012)
Coastline
- 3,542 kilometres (2,201 mi)
- A recent global remote sensing analysis suggested that there were 1,354km² of tidal flats in the Bahamas, making it the 24th ranked country in terms of tidal flat area.[15]
Sea territory
- 654,715 km2 (252,787 sq mi)
Terrain
- The terrain consists of long, flat coral formations with some low rounded hills.
Extreme points
- Northernmost point – Walker's Cay, Abaco Islands
- Southernmost point – Matthew Town Great Inagua island
- Westernmost point – Elbow Cays, Bimini
- Easternmost point – Mayaguana Island
- Lowest point – Atlantic Ocean 0 m
- Highest point – Mount Alvernia: 63 m
- Closest point to Cuba - Cay Lobos 22 km (13.7 mi)
Irrigated land
- 10 km2 (2003)
Total renewable water resources
- 0.02 km3 (2011)
Landforms
As an island nation, The Bahamas is made up of numerous archipelagos, beaches, straits, blue holes, and other landforms. The tallest mountain is Mount Alvernia, at only 207 feet above sea level. Notable bodies of water include Dean's Blue Hole, Lake Rosa, and the Goose River. The Bahamas also contains many creeks.
Environment
Natural hazards
- Hurricanes and other tropical storms that cause extensive flood and wind damage
Environment - Current issues
- Coral reef decay
- Solid waste disposal
Environment - International agreements
Party to these agreements:
- Biodiversity, Climate Change, Climate Change-Kyoto Protocol, Desertification, Endangered Species, Hazardous Wastes, Law of the Sea, Ozone Layer Protection, Ship Pollution, Wetl
Geography - note
- The Bahamas is strategically located adjacent to the United States and Cuba (Cay Confites to 14 miles).
- The Bahamas is an extensive island chain of which 30 islands are inhabited.
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