The evolution of climateBrooks, C. E. P. (Charles Ernest Pelham)
Science
The evolution of climate
Brooks, C. E. P. (Charles Ernest Pelham)
Climatology; Paleoclimatology
In the dry interior of Australia there is evidence that at one time,
probably during the maximum glaciation, the rainfall was heavier than
the present, and numerous lakes were developed which have now been
dry for a very long time. It is possible that the artesian water
supply of Australia, which Gregory considers to be “fossil water”
accumulated under different conditions from the present, is a vestige
of the rainfall of this period. Further north, in Java, the beds in
which the famous _Pithecanthropus_ skeleton was found, believed to be
lower glacial, contain also plant remains similar to those now found
in the Khassian mountains of Assam, one of the rainiest climates in
the world. The climate of Java during the maximum glaciation was
thus decidedly rainier, and probably somewhat cooler than the present.
An extraordinary find which may be referred to here is that of
Professor Neuhauss, who discovered giant erratics, scratched and
polished, and moraines at _sea-level_ at the western end of Huon
Gulf, New Guinea. The region is very unstable, and is known to have
stood at a very much higher level, perhaps 10,000 feet or more, in
Quaternary times, and if the moraines indicate glaciers terminating
at 10,000 feet above the sea they are explicable by a slight fall of
temperature and increase of snowfall.
Turning now to New Zealand, we find extensive glacial remains on
South Island, though not on North Island. As in so many other
countries, the Quaternary opened with great elevation, which reached
at least 1500 feet over the whole group. North and South Islands
were united with each other, with Stewart Island and probably also
the outlying islands, even including the Chatham Islands, forming a
great land-mass several times the present area of New Zealand. On the
southern part of this land-mass extensive glaciers were formed; on
the east these did not reach the present sea-level, but on the snowy
south-west they extended far below it, so that the terminal moraines
are now completely submerged; possibly they were never formed, but
the debris was floated away seaward on icebergs. Further north
moraines are found near the present shore-line at many places between
Milford Sound and Hokitika, and morainic mounds cover a large part of
the low ground. Still further north they retreat inland, and in the
Nelson Province are not found below a level of 2000 feet at the foot
of Lake Rotoiti.
Public-domain text, read in full here on John Shaqi.
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