F 3
Barometric pressure was considerably above normal in January, March and June, and considerably below normal in February, August and October. The mean pressure for the year was 29ins·836 as against 29·845 in 1914 and also 29ins845 for the past 32 years. The highest pressure was 30·375 on January 17 against 30·367 in 1914 and 30·509 for the past 32 years. The lowest pressure was 29in·354 on July 28, as against 29ias256 in 1914, and 28ins·735 for the past 32 years.
It is interesting to note that the lowest pressure for the year (and simultaneously the highest temperature) occurred when the centre of a violent typhoon was about 700 miles to the north-north-east of Hongkong. The wind at the time was light and variable.
The mean temperature for the year was 73°·4 or the same as in 1914, and 1°·7 above normal. It was above normal in each month except in May, when it was 1°·3 below. The highest temperature was 93°·4 on July 28, as against 94°·0 in 1914 and 97°·0 for the past 32 years. The lowest temperature was 41°·7 on January 16, as against 47°·4 in 1915 and 32°·0 for the past 32 years.
According to the records of the Beckley anemograph the wind was again below normal in each month of the year. The mean velocity was 11·4 m.p.h. as against 11·6 m.p.h. in 1914 and 12·8 m.p.h. for the past 32 years. The greatest velocity for one hour was 56 miles at 4 p.m. on November 5, as against 42 miles in 1914 and 108 miles for the past 32 years. The maximum squall velocity, as recorded by the Dines-Baxendell anemograph, was at the rate of 69 miles per hour on November 5, as against 55 m.p.h. in 1914, and 105 m.p.h. for the past 5 years.
In connection with the continued defect in the wind velocity, as recorded by the Beckley anemograph, the following extract from the annual Report of the Director of the Royal Alfred Observatory, Mauritius, for 1914, is of considerable interest :--
'There is now reason to believe that the low velocities during the years 1901-1911 are almost entirely climatic and due probably to a periodic oscillation in this element.'
In support of this statement the Director publishes a table giving the mean monthly velocity of the wind for each lustrum since 1876.
The mean annual values are as follows:-
1876-80 12·39 m.p.h.
1881-85 10·90
1886-90 10·43
1891-95 10·82
1895-1900 10·93 m.p.h.
1901-05 10·00
1906-10 9·72
1910-14 10·87
The mean for the whole period, 1876-1910, is 11·09 m.p.h., so that the total defect of wind from 1901-1910 was 107,807 miles.
F 3
Barometric pressure was considerably above normal in January, March and June, and considerably below normal in February, August and October. The mean pressure for the year was 29ins*·836 as against 29-845 in 1914 and also 29ins845 for the past 32 years. The highest pressure was 30375 on January 17 against 30, 367 in 1914 and 30509 for the past 32 years. The lowest pressure was 29in-354 on July 28, as against 29ias 256 in 1914, and 28ins, 735 for the past 32 years.
It is interesting to note that the lowest pressure for the year (and simultaneously the highest temperature) occurred when the centre of a violent typhoon was about 700 miles to the north-north- east of Hongkong. The wind at the time was light and variable.
•
The mean temperature for the year was 73°-4 or the same as in 1914, and 1°7 above normal. It was above normal in each month except in May, when it was 1°3 below. The highest temperature was 93°4 on July 28, as against 94°0 in 1914 and 97°0 for the past 32 years. The lowest temperature was 41°7 on January 16, as against 47°4 in 1915 and 32°0 for the past 32 years.
According to the records of the Beckley anemograph the wind was again below normal in each month of the year. The mean velocity was 114 m.p.h. as against 116 m.p.h. in 1914 and 128 m.p.h. for the past 32 years. The greatest velocity for one hour was 56 miles at 4 p.m. on November 5, as against 42 miles in 1914 and 108 miles for the past 32 years. The maximum squall velocity, as recorded by the Dines-Baxendell anemograph, was at the rate of 69 miles per hour on November 5, as against 55 m.p.h. in 1914, and 105 m.p.h. for the past 5 years.
In connection with the continued defect in the wind velocity, as recorded by the Beckley anemograph, the following extract from the annual Report of the Director of the Royal Alfred Observatory, Mauritius, for 1914, is of considerable interest :--
(C
'There is now reason to believe that the low velocities during the years 1901-1911 are almost entirely climatic and due probably to a periodic oscillation in this element."
In support of this statement the Director publishes a table giving the mean monthly velocity of the wind for each lustrum since 1876.
The mean annual values are as follows:-
1876-80
12.39 m.p.h.
1881-85
10.90
1886-90
10:43
1891-95
10.82
1895-1900 1901- 05
10.93 m.p.h.
10:00
1906- 10
9.72
11
1910- 14
10.87
"
The mean for the whole period. 1876-1910, is 11:09 m.p.h., so that the total defect of wind from 1901-1910 was 107,807 miles.
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