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At high latitudes, north of the main zone of boreal forest or taiga, growing conditions are not adequate to maintain a continuous closed forest cover, so tree cover is both sparse and discontinuous.
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At and high
At one time it was the ambition of every saxophone player in every high school band in America to blow like Bird.
At the rate of need indicated in the early weeks of the month, this could mean a shortage of as high as $17,000.
At the start of a new industrial age in the 18th century, it was believed that " people are the riches of the nation ", and there was a general faith in an economy that paid its workers low wages because high wages meant workers would work less.
At Mulhouse high school he got his " Abitur " ( the certificate at the end of secondary education ), in 1893.
At least for the younger individuals, a high running speed is plausible.
* 1889 – At high noon, thousands rush to claim land in the Land Run of 1889.
At the suggestion of his friend Benjamin Ruff, Carnegie's partner Henry Clay Frick had formed the exclusive South Fork Fishing and Hunting Club high above Johnstown, Pennsylvania.
At high speeds the ailerons could apply more torque than the Spitfire's thin wings could handle, and the entire wing would twist in the opposite direction.
At the same time annual inflation in the economy was variable and during the last five years ( 2003 – 2007 ) has seen a low of 2. 3 % and high of 7. 3 %.
At high temperatures, organobromine compounds are easily converted to free bromine atoms, a process which acts to terminate free radical chemical chain reactions.
At high levels of play, especially in singles, the sport demands excellent fitness: players require aerobic stamina, agility, explosive strength, speed and precision.
At high levels of play, the backhand serve has become popular to the extent that forehand serves have become fairly rare at a high level of play.
At high levels of play, doubles rallies are extremely fast.
At high levels of play, singles demands extraordinary fitness.
At high levels of play, the formations will generally be more flexible: the top women players are capable of playing powerfully from the back-court, and will happily do so if required.
At the current time, it is more economical to smelt copper ore rather than to use bioleaching, since the concentration of copper in its ore is in general quite high.
At the end of September 2003, the first part of High Speed 1, a high speed link to the Channel Tunnel and on to France and Belgium, was completed, significantly adding to the rail infrastructure of the country.
At least 10 – 20 high power ( 1000 × oil immersion ) fields are counted and an average determined.
At low pressure, there was enough space between the gas atoms that the ions could accelerate to high enough speeds that when they struck another atom they knocked electrons off of it, creating more positive ions and free electrons in a chain reaction.
At the same time, Greek fortifications began to feature high towers with shuttered windows in the top, presumably to house anti-personnel arrow shooters, as in Aigosthena.
At these very high vacuums the effect of photon radiation pressure on the vanes can be observed in very sensitive apparatus ( see Nichols radiometer ) but this is insufficient to cause rotation.
At the same time, Greek fortifications began to feature high towers with shuttered windows in the top, which could have been used to house anti-personnel arrow shooters, as in Aigosthena.
A high point for the group was their 1963 live album At Carnegie Hall, described by critic Richard Palmer as " arguably Dave Brubeck's greatest concert ".
At age 14 Sapir won a Pulitzer scholarship to the prestigious Horace Mann high school, but he chose not to attend the school which he found too posh, going instead to Peter Stuyvesant High School, and saving the scholarship money for his college education.
At and latitudes
At higher latitudes in summer, when the sun does not sink below the horizon, a day is counted from midday to midday, and in the winter, when the sun does not rise above the horizon, from midnight to midnight.
At low latitudes, the magnetic field lines are pushed inward.
At high latitudes, the magnetic field lines are push backwards and over the polar regions.
At latitudes to the north of + 51 ° N, Vega remains continually above the horizon as a circumpolar star.
At high latitudes ( near the Earth's poles ), they are very low, making communication difficult or impossible due to factors such as atmospheric refraction, Earth's thermal emission, line-of-sight obstructions, and signal reflections from the ground or nearby structures.
At latitudes above about 81 °, geostationary satellites are below the horizon and cannot be seen at all.
At higher latitudes dugongs make seasonal travels to reach warmer water during the winter.
At other latitudes, the plane of oscillation precesses relative to Earth, but slower than at the pole ; the angular speed, ω ( measured in clockwise degrees per sidereal day ), is proportional to the sine of the latitude, φ:
At auroral and polar latitudes, small space weather events which occur frequently disrupt HF communications.
) At all latitudes the celestial equator appears perfectly straight because the observer is only finitely far from the plane of the celestial equator but infinitely far from the celestial equator itself.
At the poles ( latitudes + 90 ° and − 90 °), the longitude becomes meaningless.
At low northern latitudes, particularly around latitude 25 ° north, it is possible to observe all Messier objects in one night during a window of a few weeks from mid-March to early April.
At lower latitudes many, but not all, species breed continuously.
At higher latitudes, these differences become even more marked.
At polar latitudes, Sporadic E can accompany auroras and associated disturbed magnetic conditions and is called Auroral-E.
At polar latitudes, Sporadic E can accompany auroras and associated disturbed magnetic conditions and is called Auroral-E.
At extreme latitudes, it is usually referred to as polar day.
At high latitudes a plumb-bob is helpful to sight Polaris against a reference object close to the horizon, from which its bearing can be taken.
At one time it could be found in all the taiga forests of northern and northeastern Eurasia within the cold temperate latitudes and the coniferous forest belt in the mountain ranges of warm temperate Europe.
At the poles ( latitudes + 90 ° and − 90 °), the longitude becomes meaningless.
At latitudes higher than 7 °, the Sun would trace a circular path about 15 degrees diameter in the sky, and never set.
At lower levels it forms a zone of cold around continental glaciers in areas of high latitudes, covering perhaps 20 % of the earth ’ s land surface.
At high latitudes, they travel twice as fast as scientists believed previously, showing the ocean responds much more quickly to climate changes than was known before these missions.
At greater latitudes, spring blooms take place later in the year.
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