土壤水分是水文学、气象学、土壤学、生态学以及农业科学等研究领域中的一个重要的参数。

Soil moisture is an important factor in research fields of hydrology, meteorology, pedology, ecology, agricultural science and so on. But it is a difficult one to gain.

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积雪是一种重要的地球表层覆盖物，是气象学和水文学中一个非常重要的参数。

Snow cover is an important mulch of ground surface, as well as an important parameter of meteorology and hydrology.

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陆面过程的参数化方法是大气物理学家研究的重点，也是水文学家越来越关注的问题。

Methods for land surface process parametrization are a focal point for atmospheric physicists to investigate, and also a problem for hydrologists to be increasingly concerned about.

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