Read e-book online A beginning textbook of Lhasa Tibetan PDF

By Ellen Bartee

The aim of this textbook is to educate the scholar how one can communicate the Lhasa number of Tibetan. as the start line of this ebook is especially basic, ite offers an outstanding chance for the scholar to instantly depend on Tibetan script instead of romanized script. This, we think, may help to immerse the scholar in Tibetan.

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The large ozone amounts in connection with cold surface anticyclones in China (Lejay, 1937) are to be explained on the basis that the anticyclones are shallow and that a trough exists near the tropopause. The near coincidence of ozone maximum and surface pressure center at Oxford in the case of old, occluded cyclones (Dobson, Brewer, and Cwilong, 1946) results from the nearly vertical axes of these systems. Moreover, the largest day-to-day changes, except in regions affected by the polar night, occur during the winter months and near 60°N in connection with the strongest and deepest pressure systems.

The process can repeat itself as long as d 2n 3/dz 2 > 0 in lower levels. Reed's hypothesis is very satisfactory qualitatively because it involves the same processes that satisfactorily explain the day-to-day changes. Moreover, the process described should be most effective in connection with the greatest cyclonic activity, that is, during the winter and in the low-pressure belt near 60°N. Thus, the rapid rise of ozone during the winter months would be due to the strong cyclonic activity. During late spring and the summer, this ozoneformation process would become progressively less effective and some destructive process, which Reed assumes to involve the action of dust particles in the lower stratosphere and upper troposphere, would cause the observed ozone decrease.

Air moves northward more or less parallel to the tropopause, diverging vertically as the tropopause drops and converging horizontally as the meridians converge. At high latitudes, as the tropopause levels off, the air must penetrate the troposphere or rise and return at high levels (perhaps 30-50 km) to equatorial regions. The ozone leaving equatorial regions is continually replenished by photochemical processes and is fed into lower levels at middle latitudes where it is protected from photochemical destruction.

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A beginning textbook of Lhasa Tibetan by Ellen Bartee

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