Science for University Students. Part II. Translations. Сологуб Л.И. - 21 стр.

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The thickness is usually about 3 to 4 meters, and the sheet tends to keep moving.
At the geographic North Pole, the depth of the ocean is about 3500 meters.
Our best source of evidence concerning the last million years is found in
near-shore sediments, and particularly on fossil-bearing terraces. Molluscan
fossils are particularly useful. Different molluscan species have different
temperature affinities. In addition, they contain partially hydrolyzed proteins.
The degree of racemization of isoleucine is a function of times and
temperatures. The shells also contain strontium as a trace element which
provides a dating potential. Oxygen isotope ratios of shells reveal temperatures
present during their formation.
The importance of understanding the past, present, and future of the arctic
climate requires that support for such activities have a top priority. Desirable
efforts include more studies of fossils, an international program of deep drilling
in the Arctic, more weather monitoring, and additional satellite surveillance of
the polar region.
Philip H. Abelson
I. Read the editorial-text and state what information it carries.
II. Choose the right answer:
1) The problem which is raised by the author is the problem of
a. our attitude to world climate
b. our attitude to climate changes
c. our attitude to changes in the arctic atmosphere
2) The main thought if the text is that
a. The Arctic is a key to world climate
b. Prediction the future of the arctic climate is based on our knowledge
of the past
c. Changes in the arctic sphere are early precursors to climate change
elsewhere
3) The text also suggests that
a. those climate changes in the past were drastic
b. we should take into account climate feedback mechanisms
c. factors controlling arctic climate are simple enough
III. Find in the text the English counter-parts of these bits of the Russian
translation:
1. часть глобально большой нагревающей машины
2. нынешние гипотезы о влиянии парникового эффекта вероятнее
всего упрощены, а возможно и совершенно несостоятельны
3. существенный подъем уровня моря из-за таяния полярных льдов
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