北米の湖の堆積物コアから近年のd15Nの低下は人間活動の窒素循環への擾乱が原因と考えられていたが、アイスコアの記録は1970年以降そのような影響が緩和されたことを示唆している。NOxの排出削減努力の証拠?PNASに論文。 http://t.co/guqvwn62Xj
Increasing atmospheric acidity resulting from anthropogenic emissions of nitrogen and sulfur oxides http://t.co/j5mNfGSgZy
Beautiful new work by Isolab (Geng, Alexander, Steig et al.): N isotopes in ice cores: anthropogenic acidity change http://t.co/0Pf74LDrDl
Beautiful new work by Isolab (Geng, Alexander, Steig et al.): N isotopes in ice cores: anthropogenic acidity change http://t.co/0Pf74LDrDl
Our paper published today in PNAS: Nitrogen isotopes in Greenland ice core nitrate controlled by atmospheric acidity: http://t.co/X9Hey6eHWO
Nitrogen isotopes in ice core nitrate linked to anthropogenic atmospheric acidity change http://t.co/pZI8FvasEw
The US clean air act shows up in ice cores http://t.co/0C3UdcARxN
So cool :-) RT @melissapetru: RT @mammuthus: The US clean air act shows up in ice cores http://t.co/esN9Heu9Lv
The US clean air act shows up in ice cores http://t.co/0C3UdcARxN
The US clean air act shows up in ice cores http://t.co/0C3UdcARxN