Eventually an ice cloud like this one is created.

最后形成像这样的冰晶云。

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The DC-8 flights were meant to supplement the information gathered since 2003 by NASA's ICE Cloud and Land Elevation Satellite, or ICESat.

的DC - 8飞机是为了补充，因为由美国航空航天局的冰云和土地高程卫星，这颗卫星或2003年收集的信息。

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Then updraft wind currents carry the light, positively charged ice crystals up to the top of the cloud.

然后上升气流将轻盈的、带正电荷的冰晶带到云的顶部。

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But officials said the flights also will serve as a partial replacement for one satellite: NASA's Ice, Cloud and Land Elevation Satellite, known as ICESat.

CNN: NASA flights will study Antarctic ice changes

Less ice on rivers, lakes and the sea will lead to more evaporation, probably increasing cloud cover at mid-levels, which should have a cooling effect.

ECONOMIST: The science

In China, they use artillery shells, rockets and airplanes to spray existing cloud systems with silver iodide, a compound that triggers moisture in the clouds to form ice crystals, which then fall to earth as snow or rain.

WSJ: Blizzard Renews Storm Over China Making Snow