日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

Global EditionASIA 中文雙語Fran?ais
Opinion
Home / Opinion / To the Point

Tonga volcanic eruption won’t let summer go. Don’t worry

By Wei Ke | China Daily | Updated: 2022-01-20 17:27
Share
Share - WeChat
An eruption occurs at the underwater volcano Hunga Tonga-Hunga Ha'apai off Tonga, Jan 14, 2022 in this screen grab obtained from a social media video. [Photo/Agencies]

A major volcano erupted in Tonga, an island nation in the South Pacific, on Saturday and its mushroom clouds were visible in satellite images.

The explosion accompanying the eruption was heard more than 2,000 kilometers away, in New Zealand, while changes in air pressure were felt in the southeastern coast of China, Japan, and even on the west coast of the United States.

Many have compared this powerful eruption with the one in Tambora, Indonesia, in 1815, and fear it could turn 2022 into a “year without summer” just as Tambora had done a year after 1815. Is that likely?

It is good to see awareness about volcanoes pulling down average air temperatures, but the two volcanic eruptions are not comparable. The drop in air temperatures is not triggered, as many believe, by volcanic ashes, which are solid particles that settle to the ground. In 1815, places 150 km away from Tambora were covered in volcanic ash 1 meter deep, but the damage it caused was short term.

It was sulfur dioxide gas, released into the stratosphere during the eruption, that later turned into sulfuric acid, an aerosol that stayed there for a whole year, blocking the sun’s rays, that gave the world its “year without summer”.

Eruption of at least 2 million tons of sulfur dioxide is required to trigger a visible drop in atmospheric temperature. In 1963, the Gunung Agung volcanic eruption in Indonesia released 8 million tons of sulfur dioxide, triggering a 0.2 C drop in temperature; in 1982, the El Chichon volcano in Mexico released 7 million tons of sulfur dioxide, triggering a similar drop; in 1991, the Pinatubo volcanic eruption in the Philippines released 20 million tons of sulfur dioxide, triggering a 0.5 C drop in temperature.

The eruption in Tonga has released just 0.4 million tons of sulfur dioxide, not enough to trigger a visible drop in temperature. However, it is still necessary to look out for possible effects on ocean temperatures and more.

Wei Ke, an associate professor at the Institute of Atmospheric Physics, Chinese Academy of Sciences

Most Viewed in 24 Hours
Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 色吊丝av中文字幕 | 在线观看中文字幕视频 | 日本午夜在线 | 亚洲成人精品在线观看 | 亚洲热在线 | 黄色一级大片在线免费看产 | 99久久婷婷国产综合精品草原 | 国产精品伦理一区 | 久久中文在线 | 牛牛av在线| 天天天色综合 | 国产白拍 | 欧美日韩在线视频观看 | 禁网站在线观看免费视频 | 亚洲欧美字幕 | 欧美一区二区免费在线观看 | 400部精品国偷自产在线观看 | 午夜视频在线免费看 | 久久久久久国产精品 | 中文字幕第九页 | 蜜桃网站在线观看 | 日本午夜在线 | 日本精品视频在线观看 | 成人动漫视频在线观看 | 蜜桃色av| 婷婷综合五月 | av在线免费网站 | 中文字幕av一区 | 欧美黑人一级爽快片淫片高清 | 日韩一区在线视频 | 一区二区黄色 | 日韩一区二区三区在线观看视频 | 久久久久女教师免费一区 | 国产精品第六页 | 亚洲黄色片网站 | 91三级| 日韩1024| 在线中文字幕视频 | 极品美女一区二区三区 | 日本在线国产 | 欧美激情 亚洲 |