#astronomy December climate in Armagh – Astronotes

January 7, 2020 - Comment

DECEMBER 2019 WARMER AND SUNNIER THAN AVERAGE WITH SLIGHTLY LESS RAINFALL. CALENDAR YEAR 2019 WARMER, SLIGHTLY WETTER, AND DULLER THAN AVERAGE Armagh Observatory reviews that December 2019 was hotter and sunnier than common and with barely much less rainfall. Taken as an entire, calendar 12 months 2019 at Armagh was hotter and barely wetter than


DECEMBER 2019 WARMER AND SUNNIER THAN AVERAGE WITH SLIGHTLY LESS RAINFALL. CALENDAR YEAR 2019 WARMER, SLIGHTLY WETTER, AND DULLER THAN AVERAGE

Armagh Observatory reviews that December 2019 was hotter and sunnier than common and with barely much less rainfall. Taken as an entire, calendar 12 months 2019 at Armagh was hotter and barely wetter than common and, with fewer than common hours of robust sunshine, relatively uninteresting.

Complete December precipitation was 75.20 mm (2.96 inches) together with eight hint values, or 74.6 mm if hint values are ignored. That is almost three% lower than the common December rainfall at Armagh, making this month barely drier than common. This was the driest December at Armagh for 3 years, that’s, since December 2016. The wettest day was the 18th with 17.2 mm (Zero.68 inches) of rainfall. It’s attention-grabbing to notice temporary bathe of rain, sleet and snow was reported at round 01:40 on the morning of the 14th. A rainbow was observed at round 10:40 on the 23rd.

With a complete of 46.eight hours of robust sunshine, December 2019 was sunnier than common with roughly 15% extra robust sunshine than the common December at Armagh. This was the sunniest December at Armagh for 3 years, that’s, since December 2016. The sunniest day was the third with 5.5 hours of robust sunshine, adopted by the 16th with 5.three hours.

December 2019 was additionally hotter than common, with a imply month-to-month temperature of roughly 6.Zero levels Celsius (42.eight levels Fahrenheit). That is 1.45 C hotter than the than the long-term (1796–2010) common December temperature at Armagh, and 1.10 C greater than the newest (1981–2010) 30-year common for December at Armagh.

The warmest day (highest most air temperature) was 13.1 C on the 10th, adopted by 12.5 C on the fifth, and the coldest day (lowest most air temperature) was three.9 C on the 15th, adopted by 5.1 C on each the 14th and 17th. The warmest night time (highest minimal air temperature) was 9.6 C on the 29th, preceded by the second-warmest night time, specifically 9.three C on the 28th. The coldest night time (lowest minimal air temperature) was -2.1 C on the 18th adopted by -Zero.5 C on the 31st. There have been 18 floor frosts, the coldest of which was -10.eight C on the 25th, and three nights with air frost (minimal air temperature lower than or equal to zero).

Taking the 12 months as an entire, calendar 12 months 2019 at Armagh was hotter and barely wetter than common, however with fewer than common hours of robust sunshine. Nonetheless, such a basic assertion masks substantial month-to-month and seasonal differences, the broader significance of that are tough to ascertain over quick timescales, for instance these lower than the standard 30-year intervals utilized by meteorologists in discussions of local weather change. This highlights the significance of sustaining long-term information reminiscent of these held at Armagh Observatory.

As far as 2019 as an entire is worried, the annual imply temperature was 10.24 C (50.four F). That is 1.18 C hotter than the long-term (1796–2010) common annual temperature at Armagh and Zero.53 C hotter than the newest (1981–2010) 30-year common. This was the ninth-warmest 12 months on document at Armagh, that’s, since every day temperature measurements started on the Observatory in December 1794. Of the 20 calendar years from 2000 to 2019 inclusive, greater than half (i.e. 12) have recorded a mean annual temperature of 10.Zero C or extra, although the warmest three years at Armagh, specifically 2007, 2006 and 1949, all occurred greater than a decade in the past.

Complete precipitation was 866.90 mm (34.13 inches) together with 62 hint values, making calendar 12 months 2019 the wettest at Armagh for 4 years. Ignoring hint values, the 12 months offered roughly 6.5% extra precipitation than the long-term (1838–2010) common complete annual rainfall at Armagh (814.29 mm). It’s noteworthy that regardless of what are usually fairly massive variations in rainfall from month to month and from 12 months to 12 months, the entire annual precipitation at Armagh, like that for sunshine however in contrast to that for temperature, exhibits no strongly growing or lowering development over timescales of the order of 100 years or extra.

Calendar 12 months 2019 was relatively duller than common with recorded robust sunshine hours totalling 1202.7 throughout the 12 months. That is 88.three% of the long-term (1881–2010) common annual sunshine at Armagh and 96.four% of the newest (1981–2010) common. This was the dullest calendar 12 months at Armagh for 14 years, that’s, since a complete of 1170.6 hours of robust sunshine have been recorded in 2005.

These information consult with observations at Armagh Observatory, which has been recording the climate at Armagh since 1795.
FOR FURTHER INFORMATION PLEASE CONTACT: Mark Bailey on the Armagh Observatory, Faculty Hill, Armagh, BT61 9DG. Tel.: 028-37522928; FAX: 028-3752-7174; mark.bailey@armagh.ac.uk; URL: http://local weather.arm.ac.uk/.



Supply hyperlink

Comments

Comments are disabled for this post.