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Palmyra Atoll

Palmyra Atoll is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Palmyra Atoll rather than just read about it. In short: Palmyra Atoll (; formally the Palmyra Atoll Territory), or Palmyra Island, is a small, low-lying, uninhabited atoll in the central Pacific Ocean that is a Territory of the United States and insular area; it is the only officially incorporated territory in the Union. It is one of the Northern Line Islands (southeast of Kingman Reef and north of Kiribati), and is located almost due south of the Hawaiian Islands, rough…

Palmyra Atoll — main illustration
Palmyra Atoll — illustration

Key takeaways

  • Palmyra Atoll belongs to earth science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Palmyra Atoll to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Palmyra Atoll from memory before moving on to harder problems.

Reference excerpt

Palmyra Atoll (; formally the Palmyra Atoll Territory), or Palmyra Island, is a small, low-lying, uninhabited atoll in the central Pacific Ocean that is a Territory of the United States and insular area; it is the only officially incorporated territory in the Union. It is one of the Northern Line Islands (southeast of Kingman Reef and north of Kiribati), and is located almost due south of the Hawaiian Islands, roughly one-third of the way between Hawaii and American Samoa. North America is about 3,300 miles (5,300 kilometers) northeast and New Zealand the same distance southwest, placing Palmyra Atoll at the approximate center of the Pacific Ocean. The land area is 4.6 sq mi (12 km2), with about 9 miles (14 km) of sea-facing coastline and reef. There is one boat anchorage, known as West Lagoon, accessible from the sea by a narrow artificial channel and an old airstrip; during World War II it was turned into a Naval Air Station for several years and used for training and refueling. It was shelled by a submarine in December 1941, days after the attack on Pearl Harbor, but was not the site of a major battle. Palmyra has, over time, had many of its islets merged together, so the actual amount of contiguous land depends on the tide and locations of sandbanks. For example, Strawn, Menge, and Cooper Islands are one contiguous island. Likewise, there are many shoals and coral heads on the atoll, which is ringed by a coral reef. It is the second-northernmost of the Line Islands and one of three American islands in the archipelago, along with Jarvis Island and Kingman Reef. Palmyra Atoll is part of the Pacific Islands Heritage Marine National Monument, the world's largest marine protected area. The atoll comprises submerged sand flats along with dry land and reefs. It comprises three lagoons separated by coral reefs. The western reef terrace is one of the biggest shelf-reefs, with dimensions of 2 by 3 miles (3.2 by 4.8 km). Over 150 species of coral inhabit Palmyra Atoll, double the number recorded in Hawaii. Palmyra Atoll has no permanent population, but there is a steady stream of temporary staff and visitors for research, tourism, and other projects such as marine science or survey work. It is administered as an incorporated unorganized territory, presently the only one of its kind, by the United States Fish and Wildlife Service of the United States Department of the Interior. The territory hosts a variable transient population of 4–25 staff and scientists employed by various departments of the U.S. government and by The Nature Conservancy, as well as a rotating mix of Palmyra Atoll Research Consortium scholars. Submerged portions of the atoll are administered by the Department of the Interior's Office of Insular Affairs. In 2000, most of the land on the atoll, excluding only the Home and possibly Sand islets, was bought by The Nature Conservancy for US$30 million (GBP 21 million) from the Fullard-Leo family.

Geography The atoll consists of an extensive reef, three shallow lagoons, and a number of sand and reef-rock islets and bars covered with vegetation—mostly coconut palms, Scaevola, and tall Pisonia trees. Many of the islets are connected. Sand Island and the two Home Islets in the west; Quail, Whippoorwill, and Bunker Islands in the north; and Eastern, Fern, Bird, and Barren Islands in the east are not. The largest island is Cooper Island in the north, followed by Kaula Island in the south. The northern arch of islets is formed by Strawn Island, Cooper Island (or Cooper-Meng Island since the original Cooper and Meng Islands were joined in 1940), Aviation Island, Quail Island, Whippoorwill Island, Bunker Island, followed in the east by Eastern Island, Papala Island and Pelican Island, and in the south by Bird Island, Holei Island, Engineer Island, Tanager Island, Marine Island, Kaula Island, Paradise Island, the Home Islets, and Sand Island (clockwise). Palmyra Atoll is in the Samoa Time Zone (UTC−11:00), the same time zone as American Samoa, Midway Atoll, Kingman Reef and Jarvis Island.

Incorporation into the United States In The Insular Cases, the Supreme Court held incorporated territories to be integral parts of the United States, as opposed to mere possessions. The incorporated Palmyra Atoll is the southernmost point of the incorporated United States, with its southernmost shore at 5°52′15″N latitude. U.S.-controlled territories such as American Samoa (and the southernmost place, Rose Atoll) are farther south, but they are not incorporated territories.

Climate Average annual rainfall is approximately 175 in (4,400 mm) per year. Temperatures average 85 °F (29 °C) year round. The atoll has nearly the highest oceanicity index (i.e., the degree to which its climate is affected by the sea) and one of the lowest diurnal and annual temperature variations of any place on Earth. Nauru has more consistent nighttime temperatures with every month recording 77 °F (25 °C) average, as well as more evenly spread precipitation.

Official names Although Palmyra is a coral atoll with several islets, not a single island, it has been called Palmyra Island since its discovery in 1802. More recently it is for some purposes called Palmyra Atoll. The name of the federal territory retained by Congress since 1959 is Palmyra Island, but the official name of the National Wildlife Refuge within the territory is Palmyra Atoll, as is the corresponding division of the Pacific Islands Heritage Marine National Monument. Formal deeds, leases and federal orders for land there call it Palmyra Island. Further, the islets on the atoll are also named island, such as Kaula Island, Cooper Island, and others. The biggest single island is Cooper Island, located on the lagoon's north side.

Political status

… excerpt ends here. Continue reading the full article.

Illustrations

Palmyra Atoll illustration
Palmyra Atoll illustration
Palmyra Atoll: Orthographic projection over Palmyra Atoll
Orthographic projection over Palmyra Atoll
Palmyra Atoll illustration
Palmyra Atoll illustration

Worked examples

Example 1 — a first encounter with Palmyra Atoll

Start with the simplest possible case. Write down what Palmyra Atoll claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Palmyra Atoll before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Palmyra Atoll ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Palmyra Atoll

In research
Palmyra Atoll appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Palmyra Atoll in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Palmyra Atoll is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1862 establishments in Hawaii, Former installations of the United States Navy, IUCN Category Ia, so understanding it makes those chapters shorter.
In everyday life
Look for Palmyra Atoll outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Palmyra Atoll in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Palmyra Atoll means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Palmyra Atoll out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Palmyra Atoll in simple terms?

Palmyra Atoll (; formally the Palmyra Atoll Territory), or Palmyra Island, is a small, low-lying, uninhabited atoll in the central Pacific Ocean that is a Territory of the United States and insular area; it is the only officially incorporated territory in the Union. It is one of the Northern Line I…

Why does Palmyra Atoll matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Palmyra Atoll?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Palmyra Atoll.

Tags

  • 1862 establishments in Hawaii
  • Former installations of the United States Navy
  • IUCN Category Ia
  • Important Bird Areas of United States Minor Outlying Islands
  • Important Bird Areas of the Line Islands
  • Insular areas of the United States
  • Integral overseas territories
  • Island restoration
  • National Wildlife Refuges in the United States insular areas
  • Nature Conservancy preserves
  • Pacific Islands Heritage Marine National Monument
  • Pacific Ocean atolls of the United States

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