The Northern Hemisphere[1] is the half of a planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.[a] that is north The word north is related to the Old High German nord, both descending from the Proto-Indo-European unit ner-, meaning "left" . (Presumably a natural primitive description of its concept is "to the left of the rising sun".) of equator An equator is the intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and containing the sphere's center of mass. The capitalized term Equator refers to the Earth's equator—the word hemisphere A sphere is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball. Like a circle in two dimensions, a perfect sphere is completely symmetrical around its center, with all points on the surface lying the same distance r from the center point. This distance r is known as the radius of the sphere. The literally means 'half sphere'. It is also that half of the celestial sphere In astronomy and navigation, the celestial sphere is an imaginary sphere of arbitrarily large radius, concentric with the Earth and rotating upon the same axis. All objects in the sky can be thought of as projected upon the celestial sphere. Projected upward from Earth's equator and poles are the celestial equator and the celestial poles. The north of the celestial equator The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. In other words, it is a projection of the terrestrial equator out into space. As result of the Earth's axial tilt, the celestial equator is inclined by ~23.5° with respect to the ecliptic plane. Earth Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets. It is sometimes referred to as the World, the Blue Planet,[note 6] or by its Latin name, Terra.[note 7]'s northern hemisphere contains most of its land area and most of its human population The world population is the population of humans on the planet Earth. It is currently estimated to be 6,866,400,000 by the United States Census Bureau. In 2009, the United Nations predicted that the population would reach 7,000,000,000 in 2011 (about 90%).

See also Arctic The Arctic is the region around the Earth's North Pole, opposite the Antarctic region around the South Pole. The Arctic includes the Arctic Ocean (which overlies the North Pole) and parts of Canada, Greenland (a territory of Denmark), Russia, the United States (Alaska), Iceland, Norway, Sweden and Finland, Temperate zone In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally relatively moderate, rather than extreme hot or cold. But in continental areas, such as Asia and central North America the variations between summer and winter can be extreme, Tropics The tropics is a region of the Earth by the Equator. It is limited in latitude by the Tropic of Cancer in the northern hemisphere at approximately 23° 26′ 16″ N and the Tropic of Capricorn in the southern hemisphere at 23° 26′ 16″ ( or 23.438° ) S. The tropics are also referred to as the tropical zone and the torrid zone (see, Seasons A season is a division of the year, marked by changes in weather, ecology, and hours of daylight and Climate Climates encompasses the statistics of temperature, humidity, atmospheric pressure, wind, rainfall, atmospheric particle count and other meteorological elements in a given region over long periods of time. Climate can be contrasted to weather, which is the present condition of these same elements and their variations over periods up to two weeks

Due to the Earth Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets. It is sometimes referred to as the World, the Blue Planet,[note 6] or by its Latin name, Terra.[note 7]'s axial tilt In astronomy, axial tilt is the angle between an object's rotational axis, and a line perpendicular to its orbital plane. It differs from inclination, winter lasts from the winter solstice The Winter Solstice occurs exactly when the Earth's axial tilt is farthest away from the sun at its maximum of 23° 26'. Though the Winter Solstice lasts only an instant in time, the term is also colloquially used as Midwinter or contrastingly the first day of winter to refer to the day on which it occurs. More evident to those in high latitudes, (typically December 22) to the vernal equinox An equinox occurs twice a year, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, the centre of the Sun being in the same plane as the Earth's equator. The term equinox can also be used in a broader sense, meaning the date when such a passage happens. The name "equinox" is derived from the Latin aequus (typically March 20), while summer lasts from the summer solstice A solstice is an astronomical event that happens twice each year when the Sun's apparent position in the sky reaches its northernmost or southernmost extremes. The name is derived from the Latin sol and sistere (to stand still), because at the solstices, the Sun stands still in declination; that is, the apparent movement of the Sun's path north or (typically June 21) through to the autumnal equinox An equinox occurs twice a year, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, the centre of the Sun being in the same plane as the Earth's equator. The term equinox can also be used in a broader sense, meaning the date when such a passage happens. The name "equinox" is derived from the Latin aequus (typically September 21).

The Arctic is the region north of the Arctic Circle The Arctic Circle is one of the five major circles of latitude that mark maps of the Earth. For Epoch 2010, it is the parallel of latitude that runs 66º 33′ 43″ north of the Equator. Its climate is characterized by cold winters and cool summers. Precipitation mostly comes in the form of snow. The Arctic experiences some days in summer on which the sun never sets, and some days in winter on which the sun never rises. The duration of these phases varies from one day for places right on the Arctic Circle to several months near the North Pole The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the northern hemisphere where the Earth's axis of rotation meets the Earth's surface. It should not be confused with the North Magnetic Pole itself.

Between the Arctic Circle and the Tropic of Cancer The Tropic of Cancer, also referred to as the Northern tropic, is the circle of latitude on the Earth that marks the apparent position of the Sun at the time of the northern solstice lies the Northern Temperate Zone In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally relatively moderate, rather than extreme hot or cold. But in continental areas, such as Asia and central North America the variations between summer and winter can be extreme. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold. However, a temperate climate can have very unpredictable weather.

Tropical The tropics is a region of the Earth by the Equator. It is limited in latitude by the Tropic of Cancer in the northern hemisphere at approximately 23° 26′ 16″ N and the Tropic of Capricorn in the southern hemisphere at 23° 26′ 16″ ( or 23.438° ) S. The tropics are also referred to as the tropical zone and the torrid zone (see regions (between the Tropic of Cancer and the equator An equator is the intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and containing the sphere's center of mass. The capitalized term Equator refers to the Earth's equator) are generally hot all year round and tend to experience a rainy season The wet season, or rainy season, is the time of year, covering one or more months, when most of the average annual rainfall in a region falls. The term green season is also sometimes used as a euphemism by tourist authorities. Areas with wet seasons are dispersed across portions of the tropics and subtropics. In contrast to areas with savanna during the 'summer' months, and a dry season The dry season is a term commonly used when describing the weather in the tropics. The weather in the tropics is dominated by the tropical rain belt, which oscillates from the northern to the southern tropics over the course of the year. The tropical rain belt lies in the southern hemisphere roughly from October to March, and during this time the during the 'winter' months.

In the northern hemisphere, objects moving across or above the surface of the Earth tend to turn to the right because of the Coriolis effect In physics, the Coriolis effect is an apparent deflection of moving objects when they are viewed from a rotating reference frame. In a reference frame with clockwise rotation, the deflection is to the left of the motion of the object; in one with anti-clockwise rotation, the deflection is to the right. The mathematical expression for the Coriolis. As a result, large-scale horizontal flows of air or water tend to form clockwise-turning gyres A gyre in oceanography is any large system of rotating ocean currents, particularly those involved with large wind movements. Gyres are caused by the Coriolis Effect; planetary vorticity along with horizontal and vertical friction, which determine the circulation patterns from the wind curl . The term gyre can be used to refer to any type of north of the equator. These are best seen in ocean circulation patterns in the North Atlantic The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about 106,400,000 square kilometres , it covers approximately twenty percent of the Earth's surface and about twenty-six percent of its water surface area. The first part of its name refers to the Atlas of Greek mythology, making the Atlantic the " and North Pacific The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east Oceans. South of the equator The Southern Hemisphere is the half of a planet that is south of the equator—the word hemisphere (from the Greek word σφαιρα +ημι(half)) literally means 'half ball'. It is also that half of the celestial sphere south of the celestial equator, the directions are reversed.

For the same reason, flows of air down toward the northern surface of the Earth tend to spread across the surface in a clockwise pattern. Thus, clockwise air circulation is characteristic of high pressure High pressure science and engineering is studying the effects of high pressure on materials and the design and construction of devices, such as a diamond anvil cell, which can create high pressure. By high pressure it is usually meant pressures of thousands or millions (megabars) of times atmospheric pressure (about 1 bar) weather cells in the northern hemisphere. Conversely, air rising from the northern surface of the Earth (creating a region of low pressure) tends to draw air toward it in a counterclockwise pattern. Hurricanes A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones feed on heat released when moist air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic and tropical storms A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones feed on heat released when moist air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic (massive low-pressure systems) spin anti-clockwise A clockwise motion is one that proceeds 'like the clock's hands': from the top to the right, then down and then to the left, and back to the top. In a mathematical sense, a circle defined parametrically in a positive Cartesian plane by the equations x = sin t and y = cos t is traced clockwise as t increases in value. Described another way, in the northern hemisphere (by contrast, they spin clockwise A clockwise motion is one that proceeds 'like the clock's hands': from the top to the right, then down and then to the left, and back to the top. In a mathematical sense, a circle defined parametrically in a positive Cartesian plane by the equations x = sin t and y = cos t is traced clockwise as t increases in value. Described another way, in the southern hemisphere).

The shadow of a sun dial moves clockwise in the northern hemisphere (opposite of the southern hemisphere). During the day the sun tends to raise to its maximum at a southerly position, whereas in the southern hemisphere it raises to a maximum that is northerly in position (as it tends towards the direction of the equator). In both hemispheres the sun rises in the east and sets in the west.

Also the Moon The Moon is Earth's only natural satellite[nb 4] and is the fifth largest satellite in the Solar System. It is the largest natural satellite in the Solar System relative to the size of its planet, a quarter the diameter of Earth and 1/81 its mass, and is the second densest satellite after Io. It is in synchronous rotation with Earth, always appears "upside down" compared to a view from the southern hemisphere and the view of the stars is much different. The North Pole faces away from the galactic centre of the Milky Way The Milky Way Galaxy, commonly referred to as just the Milky Way, or sometimes simply as the Galaxy, is the galaxy in which the Solar System is located. The Milky Way is a barred spiral galaxy that is part of the Local Group of galaxies. It is one of billions of galaxies in the observable universe. Its name is a translation of the Latin Via Lactea,; this results in there being far fewer and less bright visible stars in the northern hemisphere compared to the southern hemisphere The Southern Hemisphere is the half of a planet that is south of the equator—the word hemisphere (from the Greek word σφαιρα +ημι(half)) literally means 'half ball'. It is also that half of the celestial sphere south of the celestial equator, making the northern hemisphere more suitable for deep-space observation, as it is not 'blinded' by the Milky Way.

Contents

List of continents and countries

Continents

See also

References

  1. ^ Merriam Webster's Online Dictionary (based on Collegiate vol., 11th ed.) 2006. Springfield, MA: Merriam-Webster, Inc.
Hemispheres of the Earth
Northern hemisphere • Southern hemisphere • Eastern hemisphere • Western hemisphere • Land hemisphere • Water hemisphere

Categories: Hemispheres

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'Northern Hemisphere' News
Supply concerns push global wheat prices up - Economic Times
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Supply concerns push global wheat prices up - Economic Times
Tue, 27 Jul 2010 19:16:08 GMT+00:00
Economic Times World wheat prices staged an impressive rally during July, with production setbacks in the Northern Hemisphere sending prices to their highest level in over ...
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Winter temperatures, global warming, and the Arctic oscillation
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Sat, 06 Feb 2010 03:20:07 PST

temperatures, while red indicates warmer temperatures. Much of the Northern Hemisphere experienced cold land surface temperatures, but the Arctic ... current.com.

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