Keyphrases
North America
100%
Terrestrial Primary Productivity
100%
Arctic Warming
100%
United States
20%
Low Precipitation
20%
Net Primary Productivity
20%
Northern Hemisphere
20%
Springtime
20%
Crop Yield
20%
Primary Productivity
20%
Warming Trend
20%
Warm Temperature
20%
Observational Data
20%
Reduced Productivity
20%
Terrestrial Productivity
20%
Arctic Temperature
20%
Temperature Anomaly
20%
Productivity Decline
20%
Weather Events
20%
Multiple Observations
20%
Severe Cold Conditions
20%
Yield Data
20%
South-Central United States
20%
Negative Anomaly
20%
Individual State
20%
Numerical Model Simulation
20%
Net Productivity
20%
Northern America
20%
Cold Weather
20%
Set Model
20%
Earth and Planetary Sciences
North America
100%
United States
40%
Northern Hemisphere
20%
Numerical Model
20%
Temperature Anomaly
20%
Crop Yield
20%
Cold Weather
20%
Agricultural and Biological Sciences
Americans
100%
Primary Productivity
100%
Spring
33%