April 4th 2020


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Articles from this issue:

COVER STORY The world has changed: Now for the new order

FAMILY AND SOCIETY Move to curtail underage online porn epidemic

CANBERRA OBSERVED ScoMo's delicate balancing act in extraordinary times

NATIONAL AFFAIRS Time and timing are crucial to Cardinal Pell's appeal by Peter Westmore

NEW ZEALAND Political divisions polarise across the Ditch

NEW ZEALAND Victorian Road Map smooths way of NZ anti-life clique to abortion 'reform'

FREE SPEECH Intolerance brigade at UQ attacks professor of Law

NATIONAL AFFAIRS Victoria lifts moratorium of gas exploration

CHINESE HISTORY The Soong Dynasty: Three sisters who rules China

LAW AND SOCIETY Guilt by accusation: The kangaroos are roaming freely through Australia's legal system

GENDER POLITICS Dr Quentin Van Meter's Australian talk is opening eyes in the U.S.

INTERNATIONAL AFFAIRS Australia is not safe in the borderless globalised world

SHOPPING AND SOCIETY The Ubermensch in the aisles

MUSIC We seem to have lost the point of counterpoint

CINEMA The Current War: Industrial miracle workers

BOOK REVIEW A dark trade that continues unabated worldwide

EBOOK READ THIS Both sides to this old story

LETTERS

AS THE WORLD TURNS

NATIONAL AFFAIRS Use detention centres to help deal with covid19 epidemic

NATIONAL AFFAIRS Justice at last: Cardinal Pell set free

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AS THE WORLD TURNS




News Weekly, April 4, 2020

 

AIRBORNE NITROGEN DIOXIDE PLUMMETS OVER CHINA

NASA and European Space Agency (ESA) pollution monitoring satellites have detected significant decreases in nitrogen dioxide (NO2) over China. There is evidence that the change is at least partly related to the economic slowdown following the outbreak of coronavirus.

The maps in this article show concentrations of nitrogen dioxide, a noxious gas emitted by motor vehicles, power plants, and industrial facilities. The maps above show NO2 values across China from January 1 to January 20, 2020 (before the quarantine), and February 10 to February 25 (during the quarantine).

According to NASA scientists, the reduction in NO2 pollution was first apparent near Wuhan, but eventually spread across the country. Millions of people have been quarantined in one of the largest such actions in human history.

“This is the first time I have seen such a dramatic drop-off over such a wide area for a specific event,” said Fei Liu, an air quality researcher at NASA’s Goddard Space Flight Center. Liu recalls seeing a drop in NO2 over several countries during the economic recession that began in 2008, but the decrease was gradual.

Scientists also observed a significant reduction around Beijing during the 2008 Olympics, but the effect was mostly localised around that city, and pollution levels rose again once the Olympics ended.

The drop in nitrogen dioxide in 2020 also coincided with Lunar New Year celebrations in China and much of Asia.

The maps above show NO2 values over three periods in 2020: January 1-20 (before Lunar New Year), January 28-February 9 (around New Year celebrations), and February 10-25 (after the event). The 2020 values are compared with the same periods in 2019 for reference.

NASA Earth Observatory images by Joshua Stevens, using modified Copernicus Sentinel 5P data processed by the European Space Agency. Story by Kasha Patel




























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April 4, 2018, 6:45 pm