정책비교/의료2020. 3. 28. 06:12

코로나 바이러스 시대는, 화석연료에 근거한 생산활동이 강제로 줄어들었다. 세계 모든 국가와 공동체도 기존 '성장' '발전' 개념을 수정해야 한다. 매일 뉴스에서 GDP 수치와 주식가격 숫자로 사람들을 불안하게 하거나 들뜨게 하는 '경제적 공포, 불안'정치를 이제 종식시켜야 한다. 우리의 행복과 삶의 질을 결정하는 내용들이 보다 더 다원적으로 변해야 한다. 느린 성장, 혹은 마이너스 경제성장도 대비해야 한다. 

코로나 바이러스로 인해 다 같이 인류가 멈춰섰다. 다 함께 동시에 멈춰서 보니, 단점만 있는 게 아니라, 인간의 자연파괴를 멈춰선만큼 축소시킬 수 있다는 결과를 얻었다. 이 의미와 가치를 소중히 정치적으로 평가할 필요가 있다. 어떤 삶이 더 소중하고 행복한가? 질문을 던지고 답해야 한다.


------------------------------ BBC 뉴스 요약  


코로나 바이러스 때문에 생산활동이 감소하자, 유럽 대기 중 공기가 깨끗해졌다. 화석연료 사용 때문에 발생하는 이산화질소 (NO2) 양이 감소했다.

네덜란드 왕정 기상학 연구소가 대기 중 이산화질소 지도를 작성했다.

2019년 3월 이산화질소 평균 집적도와 2020년 3월 14일~25일 사이를 비교했다.  보통 관찰하기 좋은 스냅샷을 얻으려면 평균 10일 정도는 소요된다. 

어떻게 대기 중 공기 질을 측정하느냐?

유럽 코페르니쿠스 지구 관찰 함대의 한 부분인 '센티널-5P'에, 트로포미 Toropomi 라는 분광계를 설치했다. 이 분광계는 지구로부터 대기중으로 반사되어 나오는 햇볕의 다양한 색깔들을 분석한다.  이렇게 반사된 햇볕 색깔을 관찰함으로써, 이산화질소, 오존, 포말데히드, 아황산가스, 메탄, 일산화탄소, 에어로졸 등 존재 여부를 밝혀낸다. 

만약 사람들이 다시 코로나 바이러스 이전 시대로 복귀해 생산활동을 재개하면,  이산화질소 집적도가 어떻게 변화될 것인가를 과학자들이 예의주시할 것이다. 

https://www.bbc.com/news/science-environment-52065140


Coronavirus: Lockdowns continue to suppress European pollution

By Jonathan Amos




Science correspondent

3 hours ago-

There is enough data to be confident in the observed changes

New data confirms the improvement in air quality over Europe - a byproduct of the coronavirus crisis.


The maps on this page track changes in nitrogen dioxide (NO2) - a pollutant that comes principally from the use of fossil fuels.


Lockdown polices and the resulting reductions in economic activity have seen emissions take a steep dive.


The maps were produced by the Royal Netherlands Meteorological Institute (KNMI).


The Dutch met office leads the Tropomi instrument on the Copernicus Sentinel-5P satellite, which monitors a number of atmospheric gases, including NO2.


The comparisons being made are for concentrations in the air from 14 to 25 March with the monthly average of concentrations for March 2019.



How France was looking a year ago

You typically have to take a 10-day average to get a good snapshot, says Dr Henk Eskes from KNMI: "You can't just use one day of data," he told BBC News.


"There's a lot of variability in NO2 from day to day. And that's real variability; it's not a measurement artefact, but it's just due to changes in the weather. So when the wind direction changes, or the wind speed changes, or the stability of the boundary layer changes - you will get different readings."


Polluting gases fall rapidly as coronavirus spreads

Eye in the sky leaves polluters nowhere to hide

Why India's air looks different from space

Combining data for the 10 days irons out much of this variability, enabling us to see the impact of changes due to human activity.


Sentinel-5P (S5P) maps have previously been released of China and Italy. The new one of Italy on this page again shows the marked reductions in the north of country where the Covid-19 outbreak has been at its most severe.


But there are also new maps here of France and Spain.


Other countries in northern Europe are being closely monitored, including the Netherlands and the UK - but the KNMI scientists have observed a larger variability owing to changing weather conditions.


The time period to see the dip in concentrations in the UK is also quite short. Britain went into lockdown after some of its Western European neighbours.


New measurements from this week will help to assess the changes in nitrogen dioxide over the UK.-

Italy's northern powerhouse as it looked last year

Sentinel-5P is part of the EU's Copernicus fleet of Earth observers, which are managed by the European Space Agency.



Built by Airbus in Britain, S5P was launched in October 2017.


It carries just the single instrument - Tropomi. This is a spectrometer that observes the reflected sunlight coming up off the Earth, analysing its many different colours.


In so doing, it can detect the presence in the atmosphere of a suite of trace gases such as nitrogen dioxide, ozone, formaldehyde, sulphur dioxide, methane, carbon monoxide and aerosols (small droplets and particles).


Scientists will combine S5P's data with a suite of atmospheric and transport models to fully understand the observations.


"For China, I think we have now very solid results, and that's in part because we have a long period already. And we have first indications of a recovery as people in China are starting to go back to work. We will closely follow the development to see if NO2 concentrations will return to pre-coronavirus levels," Dr Eske told BBC news.

Posted by NJ원시

댓글을 달아 주세요