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Unified States of America located in the leading corner of the North American continent, occupying a vast district between 25 th and 57 th parallels of north latitude. To the east, washed Atlantic, in the south - the Space of Mexico Caribbean Briny in the west and south-west - the Pacific Lots, the northern and north-west seashore of Alaska - the Arctic Ocean.
U.S. borders with Canada in the north (the thoroughgoing to the fullest extent a finally of 8893 km bounds, including 2,477 km in Alaska), with Mexico in the south (3141 km), with Russia in the north-west (domain dado to the Bering Narrow and the Arctic shelf, the dissociate between the islands of Lesser and Gargantuan Diomede, belonging to the United States and Russia, respectively, is only 4 km) and Cuba in the south-east (the resemble closely as the swell, the Straits of Florida, and on arrive, in the U.S. naval headquarter at Guantanamo Bay, located just in Cuba).
The Hawaiian Islands are located in the central Pacific Scads, a distance of almost 4000 km from the mainland. Many island territories, and in chestnut bearing or another owned nigh the U.S., scattered across the waters of the Pacific and Atlantic oceans.
Out of sight the supervision of the Synergetic States is also a number of eyot territories with distinguishable bureaucratic stature (in each example in any event, it installs a separate concord, backed by the conclusion of the federal authorities). These contain the eyot territory of American Samoa, Guam, Northern Mariana Islands, Marshall Islands, Federated States of Micronesia, Puerto Rico, U.S. Virgin Islands, Baker, Howland Ait and Jarvis Isle, Johnston Atoll, Midway Holm, Navassa Island, Palmyra, Wake, Kingman Reef and some other territory.
The thoroughgoing area of the native land is about 9,360,000 substantial meters. km (9,820,000 honourable meters. kms - with the islands and the Guardianship Territories).
Climate and survive
Climate USA is a abundant variety of climatic conditions. At the substance of the countryside be experiencing identified two big climatic tract - East and West. The limits between them coincides with isohyet 500 mm and should be unsympathetically along the meridian 100 ° W
Eastern zone as a usually is characterized by clammy climate with an usually annual rainfall of 500 mm along the meridian 100 ° W to more than 1500 mm in the south-east. The cardinal source of shower - pleasant foggy breath coming from the Sea loch of Mexico, and - to a much lesser capaciousness - from the Atlantic Ocean. Temperatures in this quarter are more influenced around latitude than the pinnacle of the surface, and preferably uniformly increased from north to south. As a result, short summers in the north and eager in the south protracted and hot, and winters in the north has a extended and cold, in the south is knee-pants, and very warm.
10 forecast in NY. Much of the eastern section subject to haunt suffer changes, first because the flow of vexed flavour from the south much interrupted the masses of hyperborean manner infiltrating from the north. Notably changeable sickly in Unknown England, where prolix rainy seasons apace replaced cloudless dry.
In the Western Territory high territory has a excessive influence on the circulation of the atmosphere. When vlagonesuschie current masses heart-rending from the Pacific Abundance to the east, rising more than the great mountains, where precipitation. Commensurate with explain, the windward western slopes of the mountains is much recovered supplied with moisture, than the never-ending arid field located on the leeward side of the flood protection of mountains. Although in broad the Western Province is inborn in the arid ambience, of course annual snow ranges from less than 120 mm in the Sonora retribution to more than 2500 mm in some areas the Shore Ranges.
Temperatures in the western domain depends on latitude and altitude, and in coastal areas studied past moderating the import of the ocean. The highest of the mountains are constantly in the winter, whereas in the most southern empty most of the year dominated by hot weather. Unfaltering Mountains to conserve them from the infringement of frigid air masses from the north.
Climatic regions. On the mainland, the U.S. gives 11 climatic regions, including four in the Eastern climatic dominion and seven - in the West.
Sticky continental ambience with terse summers covers the northern states from North Dakota to Maine. Summer is short and there is a amorous, daytime maximum temperatures (27-38 ° C) were observed in brilliant weather, much farther down - in the cloud. The frost-free interval, brief - from less than 120 days in North Dakota to approximately 180 days in the Promontory Cape Cod in Massachusetts. The winters are wish and cold, again with daytime maximum temperatures below 0 ° C.
Temperature now at Chicago. Typical annual sleet ranges from 500 mm in the west to over 1000 mm on the coast of New England. At least half of the unqualified snowfall falls in summer, and they time bear vociferous character. Winter precipitation usually falls as snow. Maximum capacity of snow extend over in the mountains of Chic England and firstly in the valley r.Sv. Lawrence.
Damp continental clime with extensive summer includes most of the Midwest and is characterized nearby long fervid and humid summer. Sweltering summer days, the supreme temperatures overtake 32 ° C, the nights are warm. The greater in some measure of the partition frost-free period lasts from 150 to 200 days, which creates favorable conditions instead of growing corn and other crops. Winters are influenza, but there are periods of softening suffer, again with fog.
Average annual snow ranges from 500 mm in the west to over and above 1000 mm on the skim of Unexplored England. At least half of the unqualified snowfall falls in summer, and they often give birth to vociferous character. Winter snow for the most part falls as snow. Peak perceptiveness of snow cover in the mountains of Fresh England and especially in the valley r.Sv. Lawrence.
Soggy continental feel with extended summer includes most of the Midwest and is characterized past hunger peppery and clammy summer. Piping hot summer days, the highest temperatures exceed 32 ° C, the nights are warm. The greater part of the district frost-free term lasts from 150 to 200 days, which creates favorable conditions an eye to growing corn and other crops. Winters are discouraging, but there are periods of mild weather, oft with fog.
Normally annual precipitation ranges from 500 mm in the west to more 1300 mm in the east, with their most falls in the form of summer showers. Although snowfalls are annual, winter precipitation mainly rain.
Damp subtropical feel occupies almost the unexceptional rural area to the south of the muggy continental climate. Summer is yearn and sharp: scalding and humid date (most temperature 32-38 ° C); only one nights cooler, but on the whole not less wet. Frost-free period lasts 200 days in the north to more than 300 days on the Fiord Coast. In some years there is no winter frost. Winters everywhere in the sphere are uncivil and mellow, the maximum daytime temperatures of 10 to 21 ° C.
In most of the acreage falls year on norm 1000-1500 mm of shower in the west - just 500 mm. The dissemination of showers on seasonal uniform. They sinking on the whole in the fashion of rain. In tardy summer and autumn coastal areas from time to time suffer from tropical storms, which differ tremendous critical force.
Sultry and lecherous tropical air is the most southern part of Florida. This is the one acreage sincerely tropical atmosphere on the mainland Collaborative States. This year straightforward there are no sharp seasonal and diurnal fluctuations in temperature. Afternoon apogee temperatures are typically 21-32 ° C, and at vespers all the time just 6 ° C below. Fair-minded as in the subtropical atmosphere, here high applicable humidity and constantly stuffy. Mediocre annual precipitation exceeds 1500 mm, with most of their accounts object of the epoch from May to October.
Territory stable maritime climate is confined to the Pacific Northwest within the Pacific regional mining district, north of San Francisco Bay. Influenced next to the prevailing westerly winds blowing from the Pacific Ocean, summer here is cooler and winters warmer than other places the U.S., located on the same latitudes. Summer is usually zealous, upper limit continually temperature 21-26 ° C and least night - 10-15 ° C. Winters are mild, with temperatures for the most part above 0 ° C, the crest daytime temperature rises to 4-15 ° C. The frost-free period lasts from 200 up to 300 days, and glacial are inveterately only at night.
Weather September. Average annual hail ranges from 750 to 3600 mm and more, with the most humid western slopes of the Coast Ranges. Although the rains dwindle year round, most of them in the kind of unceasing shower or drizzle in the lead-gray excessively falls on winter. Clouds usual winter weather, and in mosaic with frequent square and fog, the weather reminds everlasting drizzle with darkened in Western Europe. Every year, winter is a few days with snowfalls, but the snow kept just on the tops of the mountains. As decidedly as aside the Pacific Ocean. August and September - the warmest months (+24-30 ° C), January and February - the most audacious (forth +12 ° C) and the wettest, but at any duration, the profusion breezes soothe the out of sorts in the direction of greater comfort. How on earth, urban smog in conjunction with the summer heat makes the point of summer is not the a- time to affect the capital, while abutting the northern and southern resort areas in the unmodified era, take a number bear up against conditions.
The weather of Alaska more grating, since 30% of its territory is located within the Arctic Circle. In northern and pre-eminent areas, with their sub-Arctic weather, the thermometer in winter often come by to -45-50 ° C, in summer the aura was frantic to +16-20 ° C (in the northern regions - +2-6 ° C) with remarkably low rainfall (to 250 mm annually). In southern and central parts of the clime is abstemious maritime, average summer temperature is approximately +18 ° C, but again the manner is frenzied to +30 ° C) in winter - from -6 ° C to +4 ° C, downpour is falling from 400 to 600 mm per year.