Flight levels solve this problem — of aircraft flying at the same altitude, though their altimeters indicate different barometric heights — by defining altitudes based on a standardised air pressure at sea-level.

Its cool heights offer respite for humans from the hot plains below and its higher altitudes provide a refuge for flora and fauna.

Aircraft heights for air traffic control and related purposes are measured in feet in the U. S. In fact, most of the world has used feet for aviation altitudes since the end of WW2 ( meters before 1945 in all European countries except the UK ), with the notable exceptions of China, North Korea, Russia and many other CIS ( former Soviet ) countries.

PPCs operate safely at heights ranging from a few feet off the ground ( while ground skimming, a popular use of the aircraft ) to altitudes as high as 18, 000 + feet ( 5. 5 km ).

The joint Polish / Peruvian " Cañon del Colca 2005 " expedition verified the altitudes of the river and the surrounding heights via GPS.

Mountains and mountain ranges in the province include the Yandang Mountains, Tianmu Mountain, Mount Tiantai, and Mount Mogan, which reach altitudes of.

The province is characterized by numerous disconnected mountain ranges trending north and south, from in length, the higher ranges reaching altitudes of, separated by broad, intermontane desert plains or basins at altitudes varying from sea-level ( or a little less ) in the southwest, to farther inland.

The central part of the province is dominated by a series of plateaus and isolated hills, with altitudes ranging from 600 meters ( 2000 ft ) above sea level to 1000 meters ( 3300 ft ).

Especially noteworthy is the plateau called " Meseta de Somuncura " in the central-eastern part of the province, with altitudes generally above 1000 meters ( 3300 ft ) and some spots reaching 1300 meters ( 4200 ft ).

It is also further influenced by the different altitudes found in the province.

The city of Nampula lies in the center of the province of Nampula and is surrounded by plains and rocky outcrops and is just tucked in the rolling hills and rising mountains like altitudes of the interior.

Much of the province is at altitudes of over 2000 meters.

In Spain, it appears at altitudes of in the Sierra de Grazalema in the province of Cádiz and the Sierra de las Nieves and Sierra Bermeja, both near Ronda in the province of Málaga.

The climate of the canton is subtropical because of its mid-high altitude, as opposed to the climate of higher altitudes in the province between the Western and Central Cordilleras, which enclose the highlands of the Ecuadorian Andes.

In mid-June cows are moved to the highest pastures close to the snowline, where they are watched by herdsmen who stay in the high altitudes often living in stone huts or wooden barns during the summers.

For example, autopilot systems that are prolific today were started to help bomber planes fly steadily enough to hit precision targets from high altitudes.

Plate anemometers have been used to trigger high wind alarms on bridges. They are used on these high places because they are in a plate shape ; has a good measurement status on higher altitudes.

They are altitudinal migrants, generally nesting in the lower grasslands of an elevation of around 1, 300 to 2, 000 m and moving down to lower altitudes for winter.

The other rainy season is between December and June, when the northeast trade winds are common during this season, only altitudes above 600m tend to receive regular rain.

The higher altitudes of the islands are accessible on the islands of Fogo, where there is a road to the volcano and walks up to the crater, and the mountainous Santo Antão where there are hiking routes.

Aquilegia ( Columbine ) is a genus of about 60-70 species of perennial plants that are found in meadows, woodlands, and at higher altitudes throughout the Northern Hemisphere, known for the spurred petals of their flowers.

These adapted traits are a very small component of the Homo sapiens genome, but include various characteristics such as skin color and nose form, in addition to internal characteristics such as the ability to breathe more efficiently at high altitudes.

* Wind speeds are greater at higher altitudes

The zones are the lighter bands, and are at higher altitudes in the atmosphere.

For example, recent studies have suggested genetic variants in deer mice that help explain how deer mice that live in the mountains are able to survive in the thin air that accompanies high altitudes.

As gas density increases at lower altitudes, the recombination process prevails, since the gas molecules and ions are closer together.

On the Sea of Japan side are plateaus and low mountain districts, with altitudes of 500 to 1, 500 meters.

The chief mountain range, however, lies north of the Zambezi, and east of Lake Chilwa, namely, the Namuli Mountains, in which Namuli Peak rises to, and Molisani, Mruli and Mresi attain altitudes of These mountains are covered with magnificent forests.

The receiving stations at Elephant Butte and Hawkinsville are considered to be " High Altitude " stations with longer and more complex antenna systems that are designed to see targets at higher altitudes than the other four receiving stations.

The high ozone concentrations at high latitudes are due to the accumulation of ozone at lower altitudes.

But the higher altitudes are a constant 70 ° F ( 21 ° C ).

Mesons are found at high altitudes, but muons can be measured even at sea level.

These features and the fact that there are many summit passes — some at altitudes up to 2, 256 meters — have made the Carpathians less of a barrier to movement than other European ranges.

The Western Carpathians are the most densely settled, and it is in the northernmost area of this range, the Apuseni Mountains, that permanent settlements can be found at the highest altitudes.

* Section Momi ( east & central Asia, Himalaya, generally at low to moderate altitudes )

Riverine woodlands of willows, poplars are among the habitats of the Turkestan group in central Asia, as well as low scrubland, oases ; at higher altitudes it occupies habitats ranging from dense deciduous and coniferous forests to open areas with scattered trees.

It winters at lower altitudes within the breeding range and south to southern Ontario and Massachusetts, casually to central Minnesota, southeastern Wisconsin, northwestern Pennsylvania, and central New York.

The central and north part of Chatham Island are mostly flat, with altitudes raging from a few metres on the northeast and center to 50 m on the northwest, but with a few scattered hillocks.

In the south of its range ( southern Europe and central Asia ), it only occurs at high altitudes in mountains.

Tilia cordata ( Small-leaved Lime, occasionally Small-leaved Linden or Little-leaf Linden ) is a species of Tilia native to much of Europe and western Asia, north to southern Great Britain ( north to about Durham ), central Scandinavia, all over Romania, east to central Russia, and south to central Spain, Italy, Bulgaria, Turkey, and the Caucasus ; in the south of its range it is restricted to high altitudes.

Sweetgum is one of the most common hardwoods in the eastern United States, where it occurs naturally at low to moderate altitudes from southwestern Connecticut south to central Florida, and west to Illinois, southern Missouri, and eastern Texas, but not colder areas of Appalachia or the Midwestern states.

Tribe Parnassiini contains two monotypic genera, Hypermnestra, largely confined to central Asia and the genus Parnassius ( the Apollos ), a distinctive group of many species, all of which are alpine and capable of living at high altitudes.

) Floderus )-high altitudes in the mountains of central and northern Europe ( Alps, Carpathians, Scotland, Scandinavia ), leaves densely silky-hairy on both sides, 3-7 cm long, stipules early deciduous

L. A. Hetrick, writing in 1970, found it very widespread in central and northern Florida and described its flights as reaching altitudes of and extending several kilometers over the Gulf.

Endemic to central Honshū, where it grows at higher altitudes than C. japonicum.

* Windmill Palm ( Trachycarpus fortunei, T. takil )-the best known cold-hardy palms, these tough species are native to the Himalaya and east to central China, where although not growing so far north ( to about 31 ° N ) as the Needle Palm, they do grow at high altitudes where temperatures are cool.

The altitudes listed for the biotic zones are for the central Sierra Nevada.

Trachycarpus fortunei ( Chusan Palm, Windmill Palm or Chinese Windmill Palm ) is a palm native to central China ( Hubei southwards ), south to northern Burma and northern India, growing at altitudes of 100 – 2400 m. It is a fan palm, placed in Arecaceae subfamily Coryphoideae ; tribe Trachycarpeae.

Sorbus chamaemespilus ( False Medlar or Dwarf Whitebeam ) is a species of Sorbus native to the mountains of central and southern Europe, from the Pyrenees east through the Alps to the Carpathians and the Balkans, growing at altitudes of up to 2500 m.

In the United States, at altitudes of 900 – 2700 m ( 2, 900-8, 800 ft ) from the Cascades of central Oregon south through California ( Klamath Mountains, Sierra Nevada ) to northern Baja California, Mexico.

Alnus jorullensis ( Mexican alder ) is an evergreen or semi-evergreen alder, native to central and southern Mexico and Guatemala as well as to the Andes of South America, growing at high altitudes in mountains there.

Dryopteris expansa, alpine buckler fern or spreading wood fern, is a species of fern native to cool temperate and subarctic regions of the Northern Hemisphere, south at high altitudes in mountains to Spain and Greece in southern Europe, to Japan in eastern Asia, and to central California in North America.

The mountain papaya, Vasconcellea pubescens, also known as mountain paw paw, is a species of the genus Vasconcellea, native to the Andes of northwestern South America from Colombia south to central Chile, typically growing at altitudes of m. It has also been known as Carica pubescens.

Acer griseum ( Paperbark Maple ; ) is a species of maple native to central China, in the provinces of Gansu, Henan, Hubei, Hunan, Shaanxi, Shanxi, and Sichuan, at altitudes of 1, 500 – 2, 000 m.