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The Water Cycle in Many Languages

New water cycle discovered on Mars. Modelling solves mystery of continuing vapour loss.

The water cycle (article) | Ecology | Khan Academy

Andrew Masterson reports. Signs of hidden lake found beneath Martian ice caps Space. Explore Mars. Andrew Masterson is editor of Cosmos.

Evidence for global-scale human impacts on the terrestrial water cycle

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Chemical processes in the water cycle

New Tongan island offers clues to water on Mars. New perspective on an old Martian maze The Noctis Labyrinthus region of Mars, the "labyrinth of the night". Boiling water may trigger dry avalanches on Mars Are explosive effects of evaporation behind the salty streaks? We also add fluoride to protect the health of your teeth. This is done under advice from NSW Health.


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To ensure your water remains protected right to your tap, we add small amounts of chlorine to our reservoirs. This step is called secondary chlorination. If you have some water in your house, you can pour it over the frozen pipes to thaw them. Don't use hot water! If you don't have any stored water, the pipes will naturally thaw as the day gets warmer. The meter tap controls the water supply to your property - it's not a standard garden tap.

Cloudy water is caused by tiny air bubbles. The water is safe to drink. From time to time, the water may appear 'cloudy' when you turn on your tap. Cloudy water is just tiny air bubbles caused by water of different temperatures entering our system. This is completely natural, particularly in the warmer months. Your water is safe to drink. When you fill a glass, the water will clear from the bottom up and should be completely clear in a few seconds. If you're concerned, let the water rest for 30 seconds.

Water Cycle

Please contact us if you're still concerned about your water quality. This includes both residents and businesses. If we all do our bit and save a little, it will make a big difference across Greater Sydney. Changes to the colour of your drinking water can happen from time to time and are normally safe. They can happen because:.

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Salinity and temperature determine the density of ocean water, and density influences the circulation. Precipitation also affects the height of the ocean surface indirectly via salinity and density. The ocean surface is constantly being stirred up by wind and changes in density or buoyancy. The ocean naturally has different physical characteristics with depth. As depth increases, temperature decreases because the sun only heats surface waters. Warm water is lighter or more buoyant than cold water, so the warm surface water stays near the surface.

However, surface water is also subject to evaporation. When seawater evaporates, water is removed, salt remains, and relatively salty water is left behind. This relatively salty water can float at the surface; for example, in the tropics it floats because is it so warm and buoyant.


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  • At higher latitudes, sea water tends to be salty because of poleward transport of tropical water and to a lesser extent, sea ice formation. When sea ice forms, the salt is not crystallized in the ice, leaving the remaining waters relatively salty. Also, near the poles, the seawater is cold and dense. The interaction between water temperature and salinity effects density and density determines thermohaline circulation, or the global conveyor belt.

    The global conveyor belt is a global-scale circulation process that occurs over a century-long time scale.

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    Water sinks in the North Atlantic, traveling south around Africa, rising in the Indian Ocean or further on in the Pacific, then returning toward the Atlantic on the surface only to sink again in the North Atlantic starting the cycle again. Generalized model of the thermohaline circulation: 'Global Conveyor Belt' This illustration shows cold deep high salinity currents circulating from the north Atlantic Ocean to the southern Atlantic Ocean and east to the Indian Ocean.

    Deep water returns to the surface in the Indian and Pacific Oceans through the process of upwelling. The warm shallow current then returns west past the Indian Ocean, round South Africa and up to the North Atlantic where the water becomes saltier and colder and sinks starting the process all over again. Water is an integral part of life on this planet, and NASA plays a major role at the forefront of water cycle research. By studying each and every variable of Earth's water and energy cycles, "As Only NASA Can", a crucial understanding of the water cycle's effect on global climate is currently underway.

    Through NASA's water cycle research, we can understand how water moves through the Earth system in the hydrological cycle and we will be in a better position to effectively manage this vital renewable resource and help match the natural supply of water with human demands. NASA is the only national agency that has the ability to support a full range of water cycle research, from large-scale remote sensing to in-situ field observations, data acquisition and analysis, and prediction system development.

    Within the next decade, an experimental global water and energy cycle observation system combining environmental satellites and potential new exploratory missions - i. These proposed new approaches are tantalizing, for knowledge of global fresh water availability under the effects of climate change is of increasing importance as the human population grows. Space measurements provide the only means of systematically observing the full Earth while maintaining the measurement accuracies needed to assess global variability.

    This is because whereas some parts of the water cycle increase salinity, other parts decrease it.