Qingdao people go to Shenzhen

Definitely inappropriate. Shenzhen is very hot. Generally autumn (1 1) is better than Qingdao (September). I can't sleep without air conditioning. You don't need to wear a down jacket during the Spring Festival. Just wear a thin sweater and coat in the coldest weather (it will be hot). Winter is very short. The following is an excerpt:

The climate of Shenzhen is deeply influenced by monsoon, and it is mostly influenced by monsoon depression and tropical cyclone in summer, with southeast wind prevailing, high temperature and rainy. The rest seasons are mostly controlled by the polar cold ridge, and the northeast monsoon prevails, and the weather is relatively dry. The following are descriptions of different seasons.

I. Spring (February 6th to April 22nd)

The influence of cold air on Shenzhen in spring began to weaken, which was mostly controlled by weather conditions such as denatured cold ridge, static front and low trough. The weather is changeable in spring, and there is often a "warm and cold" weather. There is still strong cold air influence in early spring, and cold wave weather can still appear in late February a few years later.

When the temperature drops in spring, it is often accompanied by rainy weather. Spring is also the season with the least sunshine. In February-April, when the temperature is low and it is rainy, the monthly sunshine hours are only over 30 hours (65438+February 0959, 65438+March 0992, 65438+April 0984). What is associated with the low temperature and rainy weather in spring is the wet weather in the south, which often appears after the low temperature and rainy weather in late spring. Its climate is characterized by high temperature and high humidity, and sometimes the relative humidity continues at 100%. When the weather warms up in the south, coastal and inland rivers are often accompanied by heavy fog. Spring is the season of alternating winter and spring, and the weather process is complex and changeable. There is a saying that "a child's face changes three times a day in spring". Mesoscale weather is active in spring, and strong convective weather often occurs.

There is less rain in spring, and there will be different degrees of drought in most years.

2. Summer (April 23rd ~ 65438+1October 24th)

Summer is the prevailing period of southwest monsoon, and the subtropical westerly wind is gradually replaced by tropical easterly wind, and it is stably controlled. With the northward withdrawal of westerly jet, the precipitation in the first flood season ended. During this period, the multi-tropical cyclone activity in the northwest Pacific and South China Sea is the peak period of tropical cyclone influence or attack. In summer, under the stable control of subtropical high, high temperature weather often occurs, which is the period when extreme maximum temperature appears. However, due to the adjustment of sea breeze, the extreme maximum temperature in Shenzhen is only 38.7℃ (1July 980), and the extreme maximum temperature in general years is between 35℃ and 37℃. In September-65438+10, the cold air force in the north is strengthened, and the medium-intensity cold air can have an impact on Shenzhen. In some years, from late September of 10 to early October of 10, there may be cold dew wind weather that harms crops.

April to June is the first flood season in Shenzhen. Influenced by frontal trough, tropical clouds and easterly waves, the rain is increasing rapidly and there are many heavy rains. It may be seriously affected by tropical cyclones (typhoons) since May. July-September is the late flood season in Shenzhen, which is mainly affected by tropical cyclones (typhoons). From July to September, an average of 3-4 tropical cyclones (typhoons) affected Shenzhen. On average, summer rainfall accounts for 83.5% of the annual rainfall. The summer precipitation varies greatly from place to place, which is prone to local floods and short-term thunderstorms and windy weather. Due to the uneven heating of the underlying surface and the influence of topography, thunderstorm weather with clear local boundaries is prone to occur in summer, so there is a saying that "summer rain separates the cow's back"

The rainy season in Shenzhen generally ends in the middle and late September, and from September to 65438+ 10, Shenzhen is prone to drought.

Iii. Autumn (65438+1October 25th to 65438+1October 12 the following year)

Autumn is the transitional season in Xia Dong. The subtropical high quickly evacuated, the average position of the front on the ground has passed Nanling, the cold high quickly moved south to control Guangdong, and the temperature dropped rapidly. Autumn is a period of little rain and drought in Shenzhen. It is sunny and sunny in autumn. Due to less rainfall and large evaporation, autumn drought is prone to occur and develops rapidly. There are different degrees of autumn drought in Shenzhen almost every year.

From June 5438+00 to June 5438+0 1, there are two tropical cyclones (typhoons) affecting Shenzhen in average three years. Although the number of autumn platforms is small, it often has a serious impact.

There are many cold air influences in autumn, and there will be cold wave weather in a few years.

Four. Winter (65438+1October13 ~ February 5)

Winter is the heyday of Mongolian high in the north, with strong wind and strong subtropical westerly wind at the top. The front on the ground moves southward rapidly, and South China is often controlled by strong cold and high pressure ridges. Therefore, Shenzhen is often under the control of dry and cold airflow in winter, with the lowest temperature and scarce precipitation throughout the year.

Winter is the coldest season in Shenzhen, and about 70% of the years in Shenzhen have short winters. Although the average winter is only 24 days, most of the cold waves affecting Shenzhen occur during this period. The shortest cold weather in winter is only a few days, and the longest can last intermittently for more than three months (1987165438+1October 29th ~ 65438+March 5th 0988). There is little rain in winter and drought in autumn and winter in most years.

Verb (abbreviation of verb) The influence of urban construction on local climate

In just a few years, Shenzhen has developed from a border town to a metropolis, and the local climate has also undergone great changes.

1, urban heat island effect

With the development of urban construction, the urban heat island effect is becoming more and more obvious. 1986 ~ 1992 average temperature ratio 1953 ~ 1985 average temperature increased by 0.8℃, while 1993 ~ 1998 average temperature increased/kloc-0. The months when the temperature rises obviously are 10 ~ 12 and 10, while the temperature rises slightly from March to May. The increase of urban heat island effect temperature is mainly at night, and the ratio of day and night warming is roughly 1: 4.

2. Humidity reduction

Due to the continuous expansion of urban scale, factories, houses, public facilities, artificial pavements and good drainage in the urban area have destroyed vegetation and soil environment in a large area before the establishment of the special zone, which greatly reduced the water vapor entering the atmosphere due to evaporation, resulting in a decrease in relative humidity. The annual average relative humidity in Shenzhen is 79% in 1953 ~ 1979, 78% in Shenzhen urban area 1980 ~ 1985, and only 75% in 1986 ~ 1998.

3. Less sunshine

In cities, a lot of exhaust gas and smoke, automobile exhaust and dust raised on the ground make the air composition change and become turbid, which reduces the transparency of the atmosphere. After the solar radiation enters the atmosphere from the top of the atmosphere, it is weakened by absorption, scattering and reflection, especially the absorption of solar radiation by aerosols mainly containing sulfur dioxide, which reduces the direct solar radiation reaching the ground. Due to the air pollution over the city, the solar radiation is reduced more than that in the suburbs. The intensity of solar radiation directly affects the amount of sunshine. According to the statistics of Shenzhen Meteorological Observatory, the sunshine percentage decreased from 50% of 1954 ~ 1986 to 43% of1~1986, and from1987 ~/kloc-.

4. Light fog and haze increased sharply.

Light fog refers to a thin fog curtain composed of tiny water droplets or wet particles of hygroscopic substances. Horizontal visibility1~10km. Haze is an air turbidity phenomenon in which a large number of tiny dry dust particles, smoke particles and salt particles are uniformly suspended in the air, making the horizontal visibility less than 10 km.

In recent years, due to the large consumption of buildings, automobile exhaust, chemical production and domestic fuel in Shenzhen, the atmospheric structure of nitrogen-based pollution sources has greatly promoted the generation of haze and light fog. At the same time, their concentration tends to be stronger.

Light fog averaged 25 days in 1960s, increased to 54 days in 1970s and 79 days in 1980s, while 1990 ~ 1998 soared to 177 days.

In 1960s and 1970s, there were few haze days in Bao 'an, but since the establishment of Shenzhen Special Economic Zone, the number of haze days in Shenzhen has increased sharply, averaging about 6 days in 1980s, and 1990 ~ 1998 was 74 days.

5. Precipitation intensity increased.

Shenzhen is located in the south subtropical coastal area with abundant precipitation. The annual precipitation is mainly affected by the climate factors in large areas, and the urban construction has little effect on the annual precipitation. However, since the 1980s, the number of precipitation days has decreased, but the rainfall has not decreased, the extreme value of rainstorm has appeared constantly, and the precipitation intensity in urbanized Shenzhen has increased.