Geographical environment of Mazu township

Mazu Township is located in the northwest of Taiwan Province Strait, between 1 19゜54 and ゜ east longitude120 30', and between 25 ゜ 56' and 26 ゜ 23' north latitude, with a total area. It is away from Taiwan Province Island 1 14 nautical miles, Jinmen 152 nautical miles, Penghu 54 nautical miles, Minjiang Estuary 180 nautical miles and Fujian Coast 10 nautical miles. Total coastline of each island133km.

Mazu township is a granite cone island in geological conditions, with large and steep terrain. The cliff of Beigan Island is 294 meters above sea level, which is the highest peak of Mazu Islands. The first peak in Nangan is Yuntai Mountain, which is 248 meters high and has been listed as one of Xiaobai Mountains in Taiwan Province Province.

There are many valleys and bays, and granite rocks in coastal areas are weathered by waves, with many cliffs, dangerous reefs, sea caves and sea gates. Some bays and bays are alluvial and piled up to form beaches, gravel beaches and pebble beaches. There are only four townships in the county, but there is no beach in Dongyin.

Extreme East: East coast of Shiwei East Island, east longitude 120 degrees 30 minutes 08 seconds; Extreme south: south bank of Lin 'ao Reef, Dongju Island, 25 degrees 56 minutes 04 seconds north latitude; Extreme west: west bank of Jinsha Village, Nangan Island, east longitude 1 19 degrees 54 minutes 04 seconds; The northernmost point: the northern shore of the solid reef in the northern part of Yinxi Island, 26 degrees 23 minutes 08 seconds north latitude. Mazu Township has a subtropical maritime climate with four distinct seasons, cold and humid winter, foggy exchanges in spring and summer, and generally stable weather in autumn. The latitude of Mazu is slightly higher than the northern part of Taiwan Province Province (about one degree), but due to the continental climate close to Chinese mainland, the temperature is lower than that of Taibei, with an annual average temperature of 18.6℃, and the temperature difference between morning and evening is large. The annual temperature is the lowest in February and February, and gradually rises after March. The highest temperature is in July and August, and the monthly average temperature is about 29℃, then it gradually decreases, and the lowest monthly average temperature is only about 10℃ in February.

The wind speed is between 10 and March of the following year, and the continental cold air mass moves southward with a strong northeast monsoon, so the wind speed is the largest. Especially from March to May, southerly winds began to blow, forming foggy weather. This is the famous advection fog. Every spring, the south wind brings warm and humid air from the Taiwan Province Strait, which contacts with the lower temperature of Mazu ground and water, forming dense fog. The thickness of advection fog can reach 700-800 meters or more, and solar radiation can only eliminate part of the top of the clouds at most during the day when the weather is good. Therefore, if advection fog continues for a long time, the visibility will drop sharply, which is also the reason why flights in Mazu area often stop this season.

The annual rainfall in Mazu Township is mostly concentrated in April-May, while typhoons mostly occur in July and August. The average annual rainfall is about 1.060mm, which is less than half of that in Taiwan Province Province. The rainy season is concentrated in the rainy season and typhoon season from April to September.