What are the climatic characteristics of Huludao?

The average temperature in 2009 was higher than in previous years, and the frost-free period was longer than in previous years. The annual precipitation is less, and the temporal and spatial distribution is extremely uneven. The first soaking rain occurred on April 19. The sunshine hours in most areas are more than in previous years. The types of meteorological disasters in the whole year decreased compared with previous years, but extreme events occurred frequently. The main meteorological disasters are drought in summer and autumn, local strong convection in summer, continuous high temperature in mid-August and cold wave at the end of the year. The drought in summer and autumn in Lianshan, Jianchang and Nanpiao is the most serious year since 1959 has meteorological records. The drought has greatly reduced grain production and caused great losses to people's production and life. Temperature The average annual temperature in the city is (9.8 ~ 10.5)℃, which is higher than that in previous years (0.6 ~ 1.2)℃. The annual extreme maximum temperature is (34.7 ~ 37.3)℃, which occurs from August of 12 to August of 13. The annual extreme minimum temperature is -( 17.9 ~ 2 1.3)℃, and most areas appear in late February of 12. In June 5438+ 10, the average temperature was (-5.9 ~-7.5)℃, which was higher than that in the same period of last year (1.3 ~ 2.5)℃. The average temperature in February was (-3. 1 ~-2.8)℃, which was higher than that in the same period of last year (1.8 ~ 2.9)℃. The average temperature in spring (March-May) is (10.5 ~12.1)℃, which is higher than that in the same period of last year (1. 1 ~ 2. 1)℃, with the national average temperature in late March. The extreme maximum temperature in this season is (32.7 ~ 34.5)℃, which appears in May 18 in coastal areas and May 19 in Jianchang areas. The extreme minimum temperature in this season is -(8.3 ~ 8.8)℃ in coastal areas and-11℃ in northwest mountainous areas, both of which occurred on March 2. The average temperature in summer (June to August) is (23.0 ~ 23.8)℃, which is higher than that in the same period of last year (0.4 ~ 0.7)℃. The extreme maximum temperature of conventional observation stations in four counties (cities) is (34.7 ~ 37.3)℃. In autumn (September ~165438+1October), the average temperature is (9.5 ~ 1 1.0)℃. The coastal areas are close to the same period of the previous years, and the northwest mountainous areas are slightly higher than the same period of the previous years. The extreme minimum temperature is close to the same period of the year, with-(10.8 ~11.9)℃ in coastal areas and-15.2℃ in northwest mountainous areas. In 65438+February, the average temperature was (-5. 1 ~-7.6)℃, which was lower than that in the same period of last year (0.7 ~ 1.5)℃, and the extreme minimum temperature was (-17.7 ~-21.3). Precipitation in 2009, the distribution of precipitation in the whole city was uneven, and the precipitation in Xingcheng was the largest, which was 510.4 mm; The minimum length of lianshan is 370.4 mm, which is less than that in previous years (1 ~ 4). 65438+ 10. The precipitation in June was (1.5 ~ 2.6) mm, and the precipitation in the same period in previous years was (1.9 ~ 2.9) mm. The precipitation was concentrated in a citywide snowfall on the 22nd. The precipitation in February was (14.5 ~ 28.2) mm, and the precipitation in the same period over the years was (1.9 ~ 2.4) mm, which was (12.6 ~ 24.8) mm more than that in the same period over the years. In spring (March to May), the precipitation shows a trend of less, more and less. The average precipitation is 83.5 mm, which is more than 30% in Lianshan, more than 1% in Jianchang and less than 1 ~ 20% in other areas. Compared with previous years, it is slightly less in March, more in April and more in early May. The first soaking rain in spring (rainfall ≥ 10 mm) occurred in April of 19, with an average rainfall of 23 mm, and the precipitation in summer (June-August) was (196.3-359.9) mm, with extremely uneven distribution in time and space. Except for Xingcheng, which decreased by 65438 0% compared with the same period of last year, it was less in other places (3 ~ 5%). In autumn (September ~165438+1October), the precipitation is (47.6 ~ 1 1.3) mm, which is more in Suizhong than in the previous year 1%, and less in other places (4 ~ 6)%. The first snow appeared in the evening of165438+1October 12, with precipitation of (2.7 ~ 6.2) mm and snow depth of (3.7 ~ 7.8) cm. The precipitation in June and February of 5438 was (0.8 ~ 4.8) mm, and the distribution of snowfall was extremely uneven. Lianshan and Suizhong are basically the same as in previous years, and Jianchang and Xingcheng are less than in previous years (6 ~ 8). There is plenty of sunshine in all parts of Rizhao, and the annual sunshine hours are (2636 ~ 1996) hours. Lianshan is close to the same period of previous years, and other areas have more (187 ~ 293) hours than the same period of previous years. The sunshine hours in June 5438+ 10 were (220 ~ 247) hours, which was (14 ~ 30) hours more than the same period of last year. The sunshine hours in February are (162 ~ 22 1) hours. Xingcheng and Suizhong are (7 ~ 17) hours more than the same period of last year, Lianshan is 8 hours less than the previous year, and Jianchang is 46 hours less than the previous year. The sunshine hours in spring are (762 ~ 864) hours, and the coastal areas are (32 ~ 97) hours more than the same period of last year, and Jianchang is close to the same period of last year. Xingcheng and Suizhong are more obvious, especially in the coastal areas in May, where the sunshine is obviously more (30 ~ 50 hours). There is no shortage of photos everywhere in spring. The sunshine hours in summer are (687 ~ 790) hours, which are significantly more (59 ~ 158) hours in coastal areas than in the same period of previous years, and about 36 hours less in northwest mountainous areas. The sunshine hours in autumn are (595 ~ 672) hours, among which Lianshan and Jianchang are (52 ~ 7 1) hours less than the same period of last year, while Xingcheng and Suizhong are close to the same period of last year. In 65438+February, the sunshine hours in various places were (18 1 ~ 2 15) hours, among which Xingcheng and Suizhong were more (13 ~ 15) hours than in previous years, while Lianshan and Jianchang were less. Major Meteorological Disasters In 2009, the types of meteorological disasters in the city decreased compared with previous years, but extreme events occurred frequently. The main meteorological disasters are drought, local strong convection, high temperature, cold wave and fog, among which drought has the widest influence and serious losses. 1. Drought: There are different degrees of drought all over the city this year. Since late June, there has been less precipitation in most areas. From mid-July to mid-August, the summer drought is more serious, the northwest mountainous area is moderately to severely dry, and most coastal areas are lightly to moderately dry. From late August to mid-September, the precipitation in most areas continued to be less, which caused the drought in areas that have been alleviated (such as Xingcheng) to hang in autumn, and the drought in the original dry areas (such as Lianshan, Jianchang and Nanpiao) was further aggravated, from summer drought to summer and autumn drought. The results of this year's drought grading assessment show that the droughts in Lianshan, Nanpiao and Jianchang are severe this summer and autumn, which is moderate to severe, and it is the worst year since 1959 has meteorological records. 2. Local strong convective weather: This year, there were 7 obvious local strong convective weather in * * * of the city, including 4 times with large disaster area and serious losses. On June 9th, 25 villages in Ge Jia, Dawangmiao and Gaodianzi in Suizhong were hit by hail. There were 400,000 affected fruit trees, crops 16 square kilometers and 236 greenhouses, with a direct economic loss of 74.98 million yuan. On June 14, four towns (22 villages) in Suizhong, namely Xiping, Gao Tai, Dawangmiao and Gaodianzi, were suddenly attacked by hail, accompanied by short-term heavy precipitation, with the hail lasting for about 20 minutes and the heavy precipitation lasting for 38 minutes. The disaster * * * caused a reduction of agricultural products by 3 1.459 tons and a direct economic loss of 5 1.82 million yuan. On June 29th, Lianshan town (village *** 17) was hit by hail. The affected area of crops is 36.2 square kilometers, and the direct economic loss is 40.396 million yuan. On August 27th, from 14: 35 to 16: 00, 39 villages in five towns and villages, including Dawangmiao, Jia Fan, Mingshui, Qiu Zi ditch and Jiabeiyan, suffered from gale and hail disaster. As a result, the output of agricultural products decreased by 63,876 tons and the direct economic loss was 79,665,438+10,000 yuan. 3. High temperature: from August 1 1 to August 65438+5, there was a large-scale continuous high temperature weather in the city, with the highest temperature exceeding 35℃ in Lianshan for five consecutive days, Jianchang for four consecutive days, and Suizhong 1 day. The observation results of automatic encryption stations in towns and villages show that the highest temperature is in June 5438+03 and June 5438+04, and the highest temperature in most parts of the city exceeds 35℃, among which more than 30 automatic encryption stations reach above 37℃. 4. Cold wave: In 2009, the city experienced five cold waves, of which the temperature dropped by about 10℃ from February 25th to 26th. The meteorological department made an accurate forecast in advance, and issued six cold wave blue warnings and two cold wave yellow warnings, which did not cause obvious disasters. 5. Dense fog: In 2009, the number of dense fog days in the city was 29, a decrease from the previous year. The minimum visibility is only 30m, which occurred in Xingcheng on June 65438+1October 65438+May 5, lasting for 4 hours. The longest foggy weather occurred in Suizhong on March 4th, with a duration of 14 hour and a minimum visibility of 200m.