F 13
Owing to the war, Messrs. L. Leroy & Cie., Paris, were unable to supply the distributing apparatus ordered in January, 1916.
IX. SPECIAL INVESTIGATIONS.
Winter Droughts at Hongkong. An investigation into the weather conditions in China, Siberia, India, South Africa and South America prior to winter droughts at Hongkong, yielded no evidence of a correlation by which these droughts might be predicted.
The Wind at the Victoria Peak.--The tabulation of the anemograph records at Victoria Peak, Hongkong, has been commenced.
An examination of the records has shown how necessary are the modifications to the Standard pattern of Beckley's Anemograph, mentioned in the Introduction to the Monthly Meteorological Bulletin for January, 1913. A start has been made by graduating the drums of the crown wheels which drive the velocity and direction pencils, the former to miles and the latter to points. A worm wheel has also been fitted to record the revolutions of the velocity pencil on a dial. The other necessary modifications have not yet been made. A discussion of the records promises to be of considerable interest. The two years already tabulated show that the diurnal inequality of the wind velocity at Victoria Peak is quite different to that at Kowloon.
The Climate of Hongkong.—A memoir on the climate of Hongkong was published on July 12.
Rainfall Maps of China.-Provisional monthly rainfall maps of China have been constructed; principally from data published by the Zikawei Observatory, and the records from stations of the Chinese Maritime Customs.
The results show that the wettest area is near the mouth of the Yangtze in January, becoming more and more south until in May the wettest district is a little to the north of Hongkong. In June it is farther north, and in July is in the neighbourhood of Pakhoi, in August and September it is apparently slightly to the south of Hongkong. In October and November it lies over the lower Yangtze Valley, and in December its position is doubtful, but probably somewhere between the lower Yangtze Valley and the south coast of China.
The driest area is in the neighbourhood of the Gulf of Pechili in each month. The wettest month is June and the driest is December.
Returns from many more stations are necessary before detailed rainfall maps can be constructed. On May 18 a five-inch raingauge was sent to the Rev. O. Van De Velde, of the Roman Catholic Mission at Hokiao, Ortos, Mongolia, who had for several years noted the number of rainy days at his station, and after each fall of rain measured the depth to which it had penetrated into the ground, having no raingauge. Father Van De Velde now measures the rain or snow fall daily, and very kindly forwards the returns to Hongkong every month.
F 13
Owing to the war, Messrs. L. Leroy & Cie., Paris, were unable to supply the distributing apparatus ordered in January, 1916.
IX. SPECIAL INVESTIGATIONS.
Winter Droughts at Hongkong. An investigation into the weather conditions in China, Siberia, India, South Africa and South America prior to winter droughts at Hongkong, yielded no evidence of a correla- tion by which these droughts might be predicted.
The Wind at the Victoria Peak.--The tabulation of the anemo- graph records at Victoria Peak, Hongkong, has been commenced.
An examination of the records has shown how necessary are the modifications to the Standard pattern of Beckley's Anemograph, mentioned in the Introduction to the Monthly Meteorological Bulle- tin for January, 1913. A start has been made by graduating the drums of the crown wheels which drive the velocity and, direction pencils, the former to miles and the latter to points. A worm wheel has also been fitted to record the revolutions of the velocity pencil on a dial. The other necessary modifications have not yet been made. A discussion of the records promises to be of considerable interest, The two years already tabulated show that the diurnal inequality of the wind velocity at Victoria Peak is quite different to that at Kowloon.
The Climate of Hongkong.—A memoir on the climate of Hong- kong was published on July 12.
Rainfall Maps of China.-Provisional monthly rainfall maps of China have been constructed; principally from data published by the Zikawei Observatory, and the records from stations of the Chinese Maritime Customs.
The results show that the wettest area is near the mouth of the Yangtze in January, becoming more and more south until in May the wettest district is a little to the north of Hongkong. In June it is farther north, and in July is in the neighbourhood of Pakhoi, in August and September it is apparently slightly to the south of Hongkong. In October and November it lies over the lower Yangtze Valley, and in December its position is doubtful, but probably some- where between the lower Yangtze Valley and the south coast of China.
The driest area is in the neighbourhood of the Gulf of Pechili in each month. The wettest month is June and the driest is December.
Returns from many more stations are necessary before detailed rainfall maps can be constructed. On May 18 a five-inch raingauge was sent to the Rev. O. Van De Velde, of the Roman Catholic- Mission at Hokiao, Ortos, Mongolia, who had for several years noted the number of rainy days at his station, and after each fall of rain measured the depth to which it had penetrated into the ground, having no raingauge. Father Van De Velde now measures the rain or snow fall daily, and very kindly forwards the returns to Hongkong every month,
No comments yet.
Private notes are available after approval.