Randy is right. You mistakenly added a 'be' into the text so that the sentence gets grammatically confusing; but then again, even if the 'be' has been taken away, the text is still difficult to be understood, for there are quite a few astronomic terms within it; furthermore, even trivial names for them are included at the same time.The original text is as below: Hogerheijde and （his) colleagues found a spectral signature that can be attributed to ice (here the words should be 'water vapor', in place of 'ice', gathered from the foregoing paragraphs) reservoirs about five one-thousandths of the mass of Earth’s oceans. But for every gram of vapour they spotted directly, there should be thousands of grams still frozen. The team inferred that the total ice reservoir in the disc should amount to several thousands of Earth’s hydrosphere. ------------- http://footballpictures.pengeng-bente.com/232/first-icy-star-disc-hints-at-source-of-earths-water/ Hogerheijde和他的同事发现一种由冰（应为水蒸气）引起的光谱信号，表明这个星系上冰(应为"水蒸汽")的蕴藏量大约为地球上海水质量的千分之五。不过，除了这些直接观察到的水蒸汽外，每一克水蒸汽都还意味着还有数千克的冰。因此这个研究小组推断，这个星系里冰的总蕴藏量将达到地球水圈总水量的好几千倍。 The original text is pretty cursory, if I can say so.

The sentence uses the verb incorrectly. Omit "be". The intended meaning is as follows. The team inferred that the total ice reservoir in the disc should equal several thousands of Earth`s hydrosphere.