How water is transformed globally between the ocean, land and the atmosphere?

Water is the most important nature factor for human life. It influences the human life directly. It is also the main driver of the climate. Although we do not have the global water budget information yet, but very close to have it. What we need is from space to monitor globally the atmosphere water content, the ocean salinity, the precipitation, the land soil moisture, the ground water run off, the polar ice melt, the underground water distribution and variations. We already have GRACE mission to monitoring the underground water distribution and variations, the polar ice melting, SMOS mission and SMAP mission will be launched soon to monitoring the land soil moisture and ocean salinity, FY3 and other weather satellites to monitoring the atmosphere water content, etc. However, the data are not integrately studied together and a more complete constelation of these kinds of satellites with higher tempo resolution are needed if we want a complete answer of this question. A global cooperation with participation of many governments like US, Europe, Russia, China, Japan and India is necessary!

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