Earth and Planetary Sciences
Tree Ring
100%
Tree rings
61%
Atmospherics
50%
Carbon 14
50%
United States of America
43%
Growing Season
28%
China
27%
Soil Organic Carbon
26%
Holocene
23%
Arizona
16%
Great Lakes Region
15%
Relative Humidity
15%
Younger Dryas
15%
California
14%
Radiocarbon Dating
14%
Tibetan Plateau
14%
Soil Moisture
13%
Isotopic Composition
12%
Vegetation
12%
Fractionation
11%
North America
11%
Time Series
11%
Stable Isotope
11%
United States
11%
Climate Change
10%
Soil Carbon
10%
Energy Balance
10%
Soil Water
8%
Planetary Atmosphere
8%
Stable Isotope
8%
Isotope Ratios
7%
Sea Surface Temperature
7%
Dendrochronology
7%
Boreal Forest
7%
Soil Nitrogen
7%
Water Use Efficiency
7%
Normalized Difference Vegetation Index
7%
Ice Core
6%
Cloud Cover
6%
Evapotranspiration
6%
Pliocene
6%
Pleistocene
6%
Forest Growth
6%
Paleoclimate
6%
Laurentide Ice Sheet
5%
Northern Hemisphere
5%
Soil Temperature
5%
Carbon Dioxide
5%
Wisconsin
5%
Oxygen 18
5%
Agricultural and Biological Sciences
Pinus
51%
Annuals
44%
Growing Season
34%
Latewood
33%
Sorghum
25%
Soil Organic Carbon
23%
Water Use Efficiency
21%
Evapotranspiration
20%
Climate Change
20%
Pinus edulis
19%
Spring Wheat
18%
Soil Water
17%
Americans
17%
Irrigation
16%
Stomatal Conductance
15%
Earlywood
14%
Fir
14%
Triticum aestivum
14%
Tree Growth
13%
Soil Moisture
12%
Free Air Carbon Dioxide Enrichment
11%
Gas Exchange
11%
Sorghum Bicolor
11%
Photosystem
11%
Relative Humidity
11%
Growth Rings
10%
Palmer Drought Severity Index
10%
Acclimation
10%
Physiological Response
10%
Sweating
9%
Spring
8%
Angiosperm
8%
Nitrocellulose
8%
Juniper
8%
Water Stress
8%
Soil Organic Matter
8%
Radiocarbon Dating
8%
Carbon Sink
7%
Stumps
7%
Climate Data
7%
Nutritive Value
6%
Boreal Forest
6%
Phenology
6%
Wind Speed
6%
Soil Carbon
6%
Water Supply
6%
White Spruce
6%
Isotope Fractionation
6%
Global Warming
5%
Permafrost
5%
Keyphrases
Tree Rings
53%
Free-air CO2 Enrichment
30%
Cellulose
19%
Stable Carbon Isotopes
16%
Carbon Isotopes
16%
Elevated CO2
15%
Wheat
14%
Latewood
12%
Soil Organic Carbon
11%
Drought
11%
Water Use Efficiency
11%
Isotope Chronology
11%
Evapotranspiration
11%
Bristlecone pine
11%
Pinyon
11%
Pine Tree
10%
Soil Nitrogen
10%
White Mountains
9%
Sorghum
9%
Moisture
9%
CO2 Enrichment
8%
Atmospheric CO2 Concentration
8%
Southwestern United States
7%
Tree Growth
7%
Sorghum Leaves
7%
Pinus Edulis
7%
Enrichment Experiments
7%
El Nio
7%
Atmospheric CO2
7%
Isotopic Composition
6%
Wheat-free
6%
Isotopic Turnover
6%
Tree-ring Research
6%
Cotton
6%
Wood
6%
US Great Plains
6%
Smith Fir
6%
Energy Balance
6%
Precipitation Reconstruction
6%
Southwestern US
6%
Earlywood
6%
Nitrogen Effect
6%
CO2 Concentration
6%
Physiological Response
6%
Ring Width
5%
US Southwest
5%
Carbon Dioxide
5%
Ring Width Index
5%
Arizona
5%
Growing Season
5%
