最近中文字幕完整版高清,宅男宅女精品国产av天堂,亚洲欧美日韩综合一区二区,最新色国产精品精品视频,中文字幕日韩欧美就去鲁

TheSalinityofOceanWaters

　　If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation--- conversion of liquid water to water vapor. In this manner the salinity is increased, since the salts stay behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.

　　The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.

　　Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.

　　A third process by which salinity may be altered is associated with the formation and melting of sea ice. When sea water is frozen, the dissolved materials are left behind. In this manner, sea water directly materials are left behind. In this manner, sea water directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

　　In the Weddell Sea Antarctica, the densest water in the oceans is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.

　　NOTE：

　　salinity / sэ'linэti; sэ`linэti/

　　n [U] the high salinity of sea water 海水的高含鹽量.

　　--->>>saline / 'seilain; US -li:n; `selin/

　　1.adj [attrib 作定語] (fml 文) containing salt; salty 含鹽的; 咸的:

　　* a saline lake 鹽湖 * saline springs 鹽泉

　　* saline solution, eg as used for gargling, storing contact lenses, etc 鹽溶液（如用于漱喉、存放隱形眼鏡等）.

　　2. n [U] (medical 醫(yī)) solution of salt and water 鹽水.

TheSalinityofOceanWaters 相關(guān)內(nèi)容：

PlateTectonicsandSea-floorSpreading
The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphere(n....
ModernAmericanUniversities
Before the 1850's, the United States had a number of small colleges, most of them dating from colonial days. They were small, church connected institutions whose primary concern was to shape the moral character of their...
childrensnumericalskills
people appear to born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth....
InternationalBusinessandCross-culturalCommunication
The increase in international business and in foreign investment has created a need for executives with knowledge of foreign languages and skills in cross-cultural communication....
TheHistoricalSignificanceofAmericanRevolution
The ways of history are so intricate and the motivations of human actions so complex that it is always hazardous to attempt to represent events covering a number of years, a multiplicity of persons, and distant...
thewarbetweenBritainandFrance
In the late eighteenth century, battles raged in almost every corner of Europe, as well as in the Middle East, south Africa ,the West Indies, and Latin America....
SkyscrapersandEnvironment
In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized....
AmericanRevolution
The American Revolution was not a sudden and violent overturning of the political and social framework, such as later occurred in France and Russia, when both were already independent nations....
考研英語作文