미국 나사에서 새로운 모델을 만들고, 이를 비디오로 제작했습니다. 이산화탄소가 전지구에서 어떻게 이동하는지 보여줍니다.
나사의 설명을 인용하자면...
이 시뮬레이션에서 바람이 온실가스를 발생원으로부터 멀리 퍼지게 하듯이, 이산화탄소 연기가 소용돌이치기도 하며 퍼져서 이동하는 것을 볼 수 있습니다. 또한, 이 시물레이션은 북반구와 남반구의 서로 다른 이산화탄소 정도 차이와, 계절의 변화에 따른 식물의 성장 싸이클에 따라 지구 전체 이산화탄소 농도의 증감 변화가 뚜렷이 나타나는 것을 보여 줍니다.
과학자들은 지난 수십년동안 지상에서 이산화탄소를 측정해왔고, 나사는 OCO-2(Orbiting Carbon Observatory-2) 위성을 발사하여, 지구 전체를 대상으로 하늘에서 이산화탄소 관찰이 가능하여졌습니다. 하지만 이 새로운 고해상도 컴퓨터 모델은 이산화탄소가 대기 전체에서 실제적으로 어떻게 움직이는지 정밀하게 보여준 첫번째 사례일 뿐입니다.
- 좀 더 고해상도 보기: 유튜브 설정에서 해상도 선택을 하면 고해상도로 볼 수 있습니다.
- 인공위성: OCO-2 (Orbiting Carbon Observatory-2)
- 컴퓨터 모델: GEOS-5
- 비디오 스크립트(script)
Hi, this is Bill Putman. I'm a climate scientist at NASA's Goddard Space Flight Center. What you’re looking at is a supercomputer model of carbon dioxide levels in the Earth’s atmosphere. The visualization compresses one year of data into a few minutes. Carbon dioxide is the most important greenhouse gas affected by human activity. About half of the carbon dioxide emitted from fossil fuel combustion remains in the atmosphere, while the other half is absorbed by natural land and ocean reservoirs. In the Northern Hemisphere, we see the highest concentrations are focused around major emission sources over North America, Europe and Asia. Notice how the gas doesn’t stay in one place. The dispersion of carbon dioxide is controlled by the large-scale weather patterns within the global circulation. During spring and summer in the Northern Hemisphere, plants absorb a substantial amount of carbon dioxide through photosynthesis, thus removing some of the gas from the atmosphere. We see this change in the model as the red and purple colors start to fade. Meanwhile, in the Southern Hemisphere, we see the release of another pollutant—carbon monoxide. This is a gas that’s both harmful to the environment and to humans. During the summer months, plumes of carbon monoxide stream from fires in Africa, South America and Australia, contributing to high concentrations in the atmosphere. Notice how these emissions are also transported by winds to other parts of the world. As summer transitions to fall, and plant photosynthesis decreases, carbon dioxide begins to accumulate in the atmosphere. Although this change is expected, we’re seeing higher concentrations of carbon dioxide accumulate in the atmosphere each year. This is contributing to the long-term trend of rising global temperatures. The Orbiting Carbon Observatory-2, or OCO-2, will be the first NASA satellite mission to provide a global view of carbon dioxide. OCO-2 observations and atmospheric models like GEOS-5 will work closely together to better understand both human emissions and natural fluxes of carbon dioxide. This will help guide climate models toward more reliable predictions of future conditions across the globe.
source:
A Year in the Life of Earth's CO2 (Youtube) http://youtu.be/x1SgmFa0r04
(NASA) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11719
WATCH: How Carbon Dioxide Travels Around The Globe (NPR) http://www.npr.org/blogs/thetwo-way/2014/11/19/365197982/watch-how-carbon-dioxide-travels-around-the-globe
No comments:
Post a Comment