Volcanic eruptions usually take two forms. One is explosive and vigorous, and a large mushroom cloud eruption column can be seen when erupting, accompanied by magma debris; There are also quiet overflow types, the most typical of which is Hawaii volcano. Lava overflows a lot and flows slowly, and most of them will form lava flow, lava blanket and lava tunnel.
Xu Jiandong, a researcher at the Institute of Geology, Seismological Bureau of China, said: The biggest difference between submarine volcanic eruption and surface volcanic eruption is the intervention of water.
"Judging from the information currently available, Tonga's volcanic eruption energy is still relatively large." Xu Jiandong said. The scale and disaster impact of Tonga volcanic eruption need to be judged according to the analysis results of volcanic monitoring data of relevant national research institutions. At present, the eruption quantity, gas composition, content and volume are unknown, so it is impossible to give the eruption level of Tonga volcano.
The eruption of Tonga volcano may affect the development of La Nina;
La Nina refers to the phenomenon that the sea surface temperature in the eastern and central equatorial Pacific Ocean continues to be abnormally cold (just the opposite of El Ni? o phenomenon), which is the product of the interaction between tropical ocean and atmosphere.
La Nina means "La Nina" in Spanish-"Little girl, saint". Contrary to the El Ni? o phenomenon, it is also called "anti-El Ni? o" or "cold event". It refers to a phenomenon that the water temperature in the eastern Pacific Ocean near the equator drops abnormally, which is characterized by obvious cooling in the eastern Pacific Ocean, accompanied by global climate chaos, and always appears after the El Ni? o phenomenon.
Satellite data show that the volcanic ash cloud ejected by the volcano forms an umbrella cloud with a diameter of nearly 500 kilometers, and the huge shock wave around the umbrella cloud is clearly visible. Like a plump earth, it burps from the mantle and exhales a hot breath.
Tonga's disaster-stricken images are exposed one after another. According to the WindRad ocean surface wind products of Fengyun-3 E-Star in June 5438+1October 55438+May, the ocean wind speed around Tonga increased abnormally before and after the volcanic eruption, indicating that there is abnormal wave activity in the waters around Tonga.
The eruption site of Tonga volcano is located in the south of the sea area where El Ni? o-La Ni? a phenomenon is mainly monitored. Volcanic eruption will affect the current development trend of La Ni? a state through the interaction between the atmosphere and the ocean.
The above contents refer to People's Information-What is the reason why Tonga volcano or its eruption affects La Nina's development?