Keyphrases
Methane Emission
75%
Atmospheric Transport
30%
Atmospheric Carbon
27%
Carbon Dioxide
21%
Natural Gas Production
18%
CH4 Emission
18%
CO2 Mole Fraction
18%
Methane
18%
Mole Fraction
17%
Permian Basin
17%
Emission Rate
17%
Pennsylvania
17%
Ethane
17%
Indianapolis
16%
North America
15%
Greenhouse Gas
14%
Isotope Ratio
14%
Satellite Observations
14%
Emission Estimation
12%
Natural Gas
12%
Marcellus
11%
In Situ
11%
In Situ Observation
10%
Net Ecosystem Exchange
10%
United States
9%
Mid-latitude
9%
Eastern USA
9%
Midwest
9%
Central U.S.
9%
Eastern United States
9%
Atmospheric Inversion
9%
Delaware Basin
9%
Nighttime
9%
Oil-type Gas
9%
Delaware
9%
Four Seasons
8%
COVID-19 Pandemic
8%
Flux Model
8%
Background Conditions
8%
Gas Production
8%
Meteorological Model
8%
Temporal Features
8%
13CH4
8%
Activity Data
7%
Trace Gases
7%
Weather Forecasting
7%
Weather Research
7%
US Midwest
7%
Coal Gas
7%
CH4-CO2
7%
Earth and Planetary Sciences
Methane
100%
Emissions
87%
Carbon Dioxide
55%
Atmospherics
45%
Americas
32%
United States
22%
Greenhouse Gas
21%
Natural Gas Production
17%
Pennsylvania
16%
Permian
16%
Indianapolis
16%
Delaware
14%
Trace Gas
14%
Isotopic Ratio
14%
Boundary Layer
10%
Net Ecosystem Exchange
9%
Satellite Observation
9%
Natural Gas
9%
North America
8%
Atmospheric Inversion
8%
United States of America
8%
Spectrometer
7%
Infrared Spectrometer
7%
Field Testing
7%
Geographic Information System
7%
Sulfide
7%
Forward Modeling
7%
Nitrous Oxide
7%
Biomass Burning
7%
Gas Supply
7%
Oil Supply
7%
Troposphere
5%
Wind Velocity
5%