【Commentary】Beginning on April 4, a large-scale sand and dust weather hit, and many places such as Inner Mongolia and Beijing reached the level of sandstorms, which is the eighth sand and dust weather process encountered by China this year. Sand and dust weather is frequent, is the ecological shelter forest built in recent years still working? Gui Hailin, chief forecaster of the Central Meteorological Observatory, gave an affirmative answer to this.
【During the same period】Chief forecaster of the Central Meteorological Observatory Gui Hailin
Shelter forest it actually plays a great role in sand and dust, shelter forest actually for China's sand and dust source of sand, in fact, from our monitoring point of view, has been greatly reduced, but due to sometimes the weather system its location and some overseas sand source of a cooperative effect, in this suitable conditions, will still occur across the international sand and dust phenomenon. Therefore, when sand and dust are frequent, it cannot deny the role of our country's ecological shelter forest.
Gui Hailin said that sandstorms are actually an international phenomenon, and international cooperation is necessary for governance.
【During the same period】Chief forecaster of the Central Meteorological Observatory Gui Hailin
In recent years, China has indeed made great achievements in ecological governance, such as our country's major projects, such as the Sanbei shelter forest, and the Beijing-Tianjin-Hebei sand control project. But the phenomenon of sandstorms, which is actually an international phenomenon, is a cross-border phenomenon, it is not just governance of our country, it must be an international cooperation. It is not only in China that there are sand sources, including Uzbekistan and Kazakhstan in Central Asia, and the Gobi Desert in southern Mongolia, where a wide range of sand sources are distributed. The governance of our country alone may not be enough.
According to the forecast range, this round of sand and dust crossed the Yangtze River and expanded to the south. Gui Hailin said that sand and dust is a long-distance transport phenomenon, when the weather system in the north is very strong, the sand and dust outbreak location is just in the main sand source, and the sand and dust intensity will be relatively large.
【During the same period】Chief forecaster of the Central Meteorological Observatory Gui Hailin
When such a weather system in the north is very strong, its eruption location is just in the main sand source, so the sand and dust intensity will be relatively large, and under the action of this high-altitude northerly air flow, it can often reach long-distance transportation. In fact, from the monitoring data, in the relatively strong dust, can even circle around the earth, in the European Alps have also detected dust particles from Asia, so sand dust is a long-distance transport phenomenon, so even if it affects some southern regions of China, it is not a particularly rare thing.
Since the beginning of this year, China has had eight sand and dust weather processes, does this mean that China has entered a new active cycle of sand and dust weather?
【During the same period】Chief forecaster of the Central Meteorological Observatory Gui Hailin
In fact, from March to May every year is the high season of sand and dust weather in China, so it is actually a normal phenomenon to appear in this season. Since 3, the number of large-scale sand and dust throughout our country has been decreasing or decreasing. But from the perspective of recent years, there are some years of sand and dust is slightly higher than the same period of the year, but in fact, the occurrence of sand and dust is related to many factors, such as surface vegetation, snow, temperature, precipitation, and the most important thing is of course the intensity of the weather system, the occurrence of the weather system It has some inter-annual changes, in general, from the current situation, it does not mean that China has entered a new (sand) active cycle.
Dong Zeyu reported from Beijing
Responsible Editor: [Li Ji]