Earth & Environmental Sciences
tracer
100%
tritium
71%
gas exchange
67%
CFC
67%
Arctic Ocean
66%
groundwater
57%
sea
50%
aquifer
45%
noble gas
37%
sea ice
37%
water
36%
deep water
36%
ocean
34%
dating
32%
basin
30%
ice
27%
isotope
27%
gas
26%
air
26%
river
24%
residence time
23%
distribution
23%
bottom water
21%
arsenic
20%
deep water formation
20%
wind velocity
20%
rate
20%
strait
20%
water mass
19%
climate
17%
mantle
17%
experiment
17%
exchange rate
16%
groundwater flow
16%
seawater
15%
recharge
14%
salinity
13%
science
13%
young
13%
mixing ratio
12%
neon
12%
meltwater
11%
water column
11%
interplanetary dust
11%
ice shelf
11%
ice cover
11%
runoff
11%
advection
11%
Physics & Astronomy
Arctic Ocean
71%
oceans
45%
gas exchange
39%
water
34%
tracers
33%
sea ice
26%
Earth mantle
22%
Indian Ocean
21%
deep water
21%
ground water
19%
helium isotopes
18%
chlorofluorocarbons
16%
gases
16%
ice
16%
air
15%
isotopes
15%
rivers
14%
shelves
13%
tritium
13%
helium
13%
salinity
13%
land ice
12%
drainage
11%
Greenland
10%
aquifers
10%
climate
9%
sediments
9%
Pacific Ocean
8%
ventilation
8%
ridges
8%
estimates
8%
ocean models
7%
stations
7%
parameterization
7%
Alpha Magnetic Spectrometer
7%
heat flux
7%
rain
7%
nutrients
7%
productivity
6%
straits
6%
winter
6%
dating
6%
interplanetary dust
6%
Canada
6%
neon
6%
anomalies
6%
arsenic
6%
rare gases
6%
Ross ice shelf
5%
carbon
5%