Agriculture & Biology
air
24%
atmospheric deposition
55%
biomass burning
63%
China
23%
coal
39%
coastal water
42%
isotopes
37%
nitrates
61%
nitrogen
21%
oxygen
25%
Pacific Ocean
87%
sampling
13%
Sea of Japan
100%
seawater
66%
South Korea
41%
stable isotopes
77%
summer
24%
Earth & Environmental Sciences
air mass
36%
atmospheric deposition
39%
biomass burning
38%
coal
24%
coastal water
33%
isotope
27%
nitrate
53%
nitrogen
22%
ocean
42%
oxygen
23%
particle
18%
sea
40%
seawater
52%
stable isotope
62%
summer
21%
vehicle
28%
Engineering & Materials Science
Air
20%
Biomass
33%
Blow molding
39%
Coal
30%
Isotopes
90%
Nitrates
92%
Nitrogen
34%
Oxygen
29%
Seawater
81%
Water
20%
Chemical Compounds
Coal
35%
Coastal Water
57%
Dioxygen
17%
Isotope
31%
Nitrate
55%
Nitrogen
22%
Reduction
16%
Stable Isotope
81%