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Volcanic eruptions effect river flow

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Edinburgh: Major volcanic eruptions can have a significant effect on the flow of the biggest rivers around the world, researchers said.

A team from University of Edinburgh did the research to better understand how big volcanic eruptions, which can trigger a shortage of rainfall, can impact rivers,  a university statement as saying.

Their findings could help scientists predict how water availability in regions throughout the world might be affected by future eruptions, it added.

The study focuses on the impact of a process in which volcanoes give off aerosol particles that reflect sunlight, cooling the atmosphere and leading to reduced rainfall.

The team analysed records of flow in 50 major rivers. Their study spanned the dates of major eruptions, from Krakatoa, Indonesia in 1883 to Pinatubo, the Philippines in 1991.

Eruptions were followed a year or two later by reduced flow in some rivers. In general, this was found in tropical regions and northern Asia, including the Amazon, Congo and Nile.

However, flow increased in some sub-tropical regions. Areas affected included the southwest of the US and parts of South America.

The Amazon is in a sparsely populated area, so reduction in its flow may have little impact. However, for rivers with high levels of human dependence, such as the Nile, loss of flow could have more impact.

“Our findings reveal the indirect effect that volcanoes can have on rivers, and could be very valuable in the event of a major volcanic eruption in future,” researcher Carley Iles said.

The study, published in Nature Geoscience online on Monday, was supported by the British Natural Environment Research Council and the European Research Council.

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Lockdowns in China Force Urban Communities to Defy Censorship and Vent Frustration Online

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Anyip Mobile Proxies

Shanghai’s rich middle class is leading a wave of online dissent over the strict and prolonged lockdowns imposed in various parts of the country. Chinese internet censorship is struggling as patience is wearing thin in many urban centers, coming up with creative forms of online protests.

Social Media Posts Revealing Lockdown Tension in Shanghai

Drawn-out lockdowns are nothing new in China as authorities insist with the nation’s zero-Covid policy since the start of the pandemic. Currently over This time around, however, metropolitan areas like Shanghai are increasingly difficult to keep quiet, given that its more than 25 million residents have seen weeks of total isolation along with food shortages and many other service interruptions.

Dozens of towns and reportedly over 300 million Chinese citizens have been affected by lockdowns of different severity. As expected, urban netizens have been most outspoken over their difficulties by finding creative ways to get around state censorship and bans placed on topics, news comments and spontaneous campaigns.

Shanghai residents have been using mobile proxies and hijacking seemingly unrelated hashtags to talk about healthcare issues, delivery failures and the overall severity of their situation. The “positive energy” that the Chinese government wants to transmit during the recent prolonged series of lockdowns does not come naturally to those counting food supplies and online censors are working hard to filter words, trending topics and undesired social media sharing.

WeChat groups and message threads are under constant monitoring. Posts questioning the zero-Covid approach have been quickly deleted, including by leading Chinese health experts like Dr. Zhong Nanshan. Video footage is soon censored and protests and investigations are quickly made to disappear.

Where this has not worked, officials have exposed banners with warnings and outright threats like “watch your own mouth or face punishment”, while drones have been patrolling the city skies. Yet, if anything, this has led to further tensions and unspoken confrontation with Shanghai’s educated and affluent middle class.

Creative Online Solutions Harnessing Civic Energy

Announcements by Chinese social media that they would be publishing the IP addresses of users who “spread rumors” have not helped either. Tech industry research has shown that much of Asia’s tech-savvy population has a habit of using mobile proxies and other privacy tools, quickly finding workarounds to browse the internet freely and talk to the world about the hottest topics.

The sheer volume of forbidden posts is already a challenge for the very censorship system, experts explain. Unable to track all trending hashtags, state workers overlook topics that speak about the US, Ukraine or other popular news. Linking human rights elsewhere to their situation, Chinese online dissidents establish their informal channels and “hijack” the conversation to share personal or publicly relevant information about the Covid suppression in their town.

Sarcastic and satirical posts still dominate. Others hope to evade the censors by replacing words from famous poems or the national anthem. One thing is certain – social media, when harnessed with the right creativity, has proven its ability to mount pressure on the government in even some of the most strictly controlled tech environments like China.

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