China News Service Haikou, July 11 (Liu Xin) The Hainan Meteorological Bureau continued to issue a high-temperature fourth-level warning on the 11th. It is expected that on the 12th, there will be high temperatures above 37 degrees in most towns and villages in 9 cities and counties in Hainan during the day. According to the introduction of the Hainan Meteorological Bureau, this is the 5th consecutive day that the bureau issued a high temperature warning and it will continue.
Since May, Hainan has experienced long-range and high-temperature weather continuously. According to the statistics of 19 national meteorological observatories in Hainan Province, from May 1 to July 9, there were 3 large-scale high-temperature weather processes in Hainan Province, which occurred on May 2 to 27 and May 29, respectively. ~June 13, June 17~July 9. There were 15 cities and counties with high-temperature weather above ≥35℃. The most accumulated high-temperature days were Changjiang 64 days, and a total of 8 cities and counties exceeded the highest record in local history over the same period.
In response to the long-term high-temperature weather that persisted for a long time this year, Li Xun, chief forecaster of the Hainan Meteorological Observatory, said that Hainan belongs to a tropical maritime monsoon climate. It is now the time when the summer monsoon is prevailing and the low altitude of Hainan Island is southwesterly. The southwestern airflow came from the Indian Ocean. After being blocked by the terrain of the Indochina Peninsula, the water vapor conditions were poor and the airflow became dry and hot. After passing through the Wuzhi Mountain in the central part of Hainan Island, this dry and hot southwest airstream became more dry and hot due to the superposition of the wind effect and the effect of the subtropical high subsidence airflow, resulting in a large-scale continuity in the northwest and north of Hainan Island. Hot weather. (The Foehn effect: the airflow passes through the mountain terrain, the water vapor is blocked by the terrain, the airflow becomes dry after climbing upwind, and sinks and warms on the leeward slope, and the temperature rises by about 6.5°C every 1000 meters.) In comparison, Hainan The eastern and southern regions of the island are located on the windward slope of the southwestern airflow due to the topography, and the temperature is not as high as that in the northwestern region. This weather situation is dominated by the summer monsoon and is difficult to dissipate. Due to insufficient water vapor conditions, the impact of thunderstorms in the afternoon is small, and there is no obvious cooling effect. There are currently few typhoons affecting Hainan Island. Therefore, the high-temperature weather will continue in mid-July, and it may be relieved in late July.
Li Xun reminded that the public should try to avoid outdoor activities in the afternoon high temperature period; heatstroke protection should be done in hot weather, try to wear light or plain clothing, wear a sun hat or umbrella, drink plenty of water; when working outdoors To avoid exposure to sunlight for a long time, and take sun protection measures; workers in outdoor or high temperature conditions should take necessary protective measures. (Finish)