Definition
The 83rd meridian west is a line of longitude that is 83 degrees west of the Prime Meridian at Greenwich. It extends from the North Pole to the South Pole, marking a north‑south geodetic line used in the geographic coordinate system.
Overview
As a meridian, the 83° W line is part of the global network of longitudinal references that facilitate navigation, mapping, and geospatial analysis. Together with the 97th meridian east, it forms a great circle that divides the Earth into two equal hemispherical halves.
Etymology / Origin
The term follows the conventional naming of meridians: the numeral indicates the angular distance in degrees east or west from the Prime Meridian, which was established at the Royal Observatory in Greenwich, London, in 1884. “83rd meridian west” therefore denotes the 83° W longitudinal position.
Characteristics
| Segment | Geographic features / political entities traversed (approximately, north to south) |
|---|---|
| Arctic region | Arctic Ocean; passes near the western edge of the Canadian Arctic Archipelago (Nunavut) |
| North America (Canada) | Mainland Nunavut, Quebec (eastern portion of the province) |
| Great Lakes region (USA) | Lake Huron (Michigan), Upper Peninsula of Michigan |
| United States (continental) | States of Ohio, West Virginia, Kentucky, Tennessee, Alabama, Georgia, and the Florida Panhandle |
| Gulf of Mexico | Gulf waters south of Florida |
| Caribbean and Atlantic | Caribbean Sea (no major islands directly intersected), Atlantic Ocean |
| Southern Ocean | Waters surrounding Antarctica |
| Antarctica | Crosses the Antarctic continent within the sector not claimed by any nation (the Antarctic Treaty System governs all claims) |
The meridian is used in cartographic representations to delineate time zones, albeit the 83° W line itself does not correspond exactly to a standard time‑zone boundary.
Related Topics
- Prime Meridian – the zero‑degree reference longitude at Greenwich.
- Lines of Longitude – the family of meridians that run from pole to pole.
- Great Circle – the largest possible circle on a sphere; the 83rd meridian west and the 97th meridian east together constitute one.
- Geographic Coordinate System – the framework of latitude and longitude used to specify locations on Earth.
- Time Zones of North America – time zones are loosely based on longitudinal divisions, with the 75° W and 90° W meridians often cited as reference lines.
Note: The precise path of the 83rd meridian west may intersect additional minor geographic features (e.g., islands, rivers) not listed here.