In situ in the context of "Forest"

Play Trivia Questions online!

or

Skip to study material about In situ in the context of "Forest"

Ad spacer

⭐ Core Definition: In situ

In situ is a Latin phrase meaning 'in place' or 'on site', derived from in ('in') and situ (ablative of situs, lit.'place'). The term refers to studying or working with something in its natural or original location rather than moving it elsewhere. This approach preserves environmental factors and relationships that might be lost when materials or specimens are relocated to controlled settings. In comparison, ex situ ('out of place') methods involve removing materials or specimens for study, preservation, or modification under controlled conditions, often at the expense of their original context. The earliest recorded use of in situ in English dates back to the mid-17th century. Its use in scientific literature expanded from the late 19th century onward, beginning in medicine and engineering, and later spreading to a wide range of disciplines.

The natural sciences typically use in situ methods to study phenomena in their original context. In geology, field studies of soil composition and rock formations may provide direct insights into Earth's processes. Biologists observe organisms in their natural habitats to understand behaviors and ecological interactions that cannot be reproduced in a laboratory. In chemistry and experimental physics, in situ techniques make it possible to watch substances and reactions as they occur, capturing transient phenomena in real time.

↓ Menu

>>>PUT SHARE BUTTONS HERE<<<

👉 In situ in the context of Forest

A forest is an ecosystem characterized by a dense community of trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' Food and Agriculture Organization (FAO) defines a forest as, "Land spanning more than 0.5 hectares with trees higher than 5 meters and a canopy cover of more than 10 percent, or trees able to reach these thresholds in situ. It does not include land that is predominantly under agricultural or urban use." Using this definition, Global Forest Resources Assessment 2020 found that forests covered 4.06 billion hectares (10.0 billion acres; 40.6 million square kilometres; 15.7 million square miles), or approximately 31 percent of the world's land area in 2020.

Forests are the largest terrestrial ecosystems of Earth by area, and are found around the globe. 45 percent of forest land is in the tropical latitudes. The next largest share of forests are found in subarctic climates, followed by temperate, and subtropical zones.

↓ Explore More Topics
In this Dossier

In situ in the context of Seven Wonders of the Ancient World

The Seven Wonders of the Ancient World, also known as the Seven Wonders of the World or simply the Seven Wonders, is a list of seven notable structures present during classical antiquity, first established in the 1572 publication Octo Mundi Miracula using a combination of historical sources.

The seven traditional wonders established by the Octo Mundi Miracula are the Great Pyramid of Giza, the Colossus of Rhodes, the Lighthouse of Alexandria, the Mausoleum at Halicarnassus, the Temple of Artemis, the Statue of Zeus at Olympia, and the Hanging Gardens of Babylon. Using modern-day countries, two of the wonders were located in Greece, two in Turkey, two in Egypt, and one in Iraq. Of the seven wonders, only the Pyramid of Giza, which is also by far the oldest of the wonders, remains standing, while the others have been destroyed over the centuries. Remains exist from the Lighthouse, Temple of Artemis and the Mausoleum – either in situ or in museums. There is scholarly debate over the exact nature of the Hanging Gardens, and there is doubt as to whether they existed at all.

↑ Return to Menu

In situ in the context of Weathering

Weathering is the deterioration of rocks, soils and minerals (as well as wood and artificial materials) through contact with water, atmospheric gases, sunlight, and biological organisms. It occurs in situ (on-site, with little or no movement), and so is distinct from erosion, which involves the transport of rocks and minerals by agents such as water, ice, snow, wind, waves and gravity.

Weathering processes are either physical or chemical. The former involves the breakdown of rocks and soils through such mechanical effects as heat, water, ice, and wind. The latter covers reactions to water, atmospheric gases and biologically produced chemicals with rocks and soils. Water is the principal agent behind both kinds, though atmospheric oxygen and carbon dioxide and the activities of biological organisms are also important. Biological chemical weathering is also called biological weathering.

↑ Return to Menu

In situ in the context of Statue of Ramesses II

The Statue of Ramesses II is a colossal 3,200-year-old figure of Ramesses II, depicting him standing. It is 11 meters tall, made from red granite, and weighs 83 tons.
The statue was discovered in 1820, broken into six pieces, at Mit Rahina near ancient Memphis, Egypt, where it lay for several decades.

Early attempts at restoration in situ failed, but in 1955, Egyptian Prime Minister Gamal Abdel Nasser moved the fragments to the large Bab Al-Hadid Square in Cairo, outside Cairo's main railway station; the square was then renamed Ramses Square. There the statue was restored to its full height and erected on a three-metre pedestal at the edge of a fountain. It was stabilized by iron bars inside the body.

↑ Return to Menu

In situ in the context of World Ocean Atlas

The World Ocean Atlas (WOA) is a data product of the Ocean Climate Laboratory of the National Centers for Environmental Information (U.S.). The WOA consists of a climatology of fields of in situ ocean properties for the World Ocean. It was first produced in 1994 (based on the earlier Climatological Atlas of the World Ocean, 1982), with later editions at roughly four year intervals in 1998, 2001, 2005, 2009, 2013, 2018, and 2023.

↑ Return to Menu

In situ in the context of Earth observation

Earth observation (EO) is the gathering of information about the physical, chemical, and biological systems of the planet Earth. It can be performed via remote-sensing technologies (Earth observation satellites) or through direct-contact sensors in ground-based or airborne platforms (such as weather stations and weather balloons, for example).

According to the Group on Earth Observations (GEO), the concept encompasses both "space-based or remotely-sensed data, as well as ground-based or in situ data". Earth observation is used to monitor and assess the status of and changes in natural and built environments.

↑ Return to Menu

In situ in the context of Space physics

Space physics, also known as space plasma physics, is the study of naturally occurring plasmas within Earth's upper atmosphere and the rest of the Solar System. It includes the topics of aeronomy, aurorae, planetary ionospheres and magnetospheres, radiation belts, space weather, solar wind, the Sun, and more recently the Interstellar medium.

Space physics is both a pure science and an applied science, with applications in radio transmission, spacecraft operations (particularly communications and weather satellites), and in meteorology. Important physical processes in space physics include magnetic reconnection, plasma waves and plasma instabilities. It is studied using direct in situ measurements by sounding rockets and spacecraft, indirect remote sensing of plasmas with radar (through methods such as Incoherent scatter and GPS scintillation), and theoretical studies using models such as magnetohydrodynamics (fluid theory), or kinetic theory.

↑ Return to Menu