Spatial and Temporal Distributions of Methane and Nitrous Oxide Emissions in North America
Eric
A.
Kort, Harvard U, kort@fas.harvard.edu
Scot
M.
Miller, Harvard U, smiller@seas.harvard.edu
Talya
Havice, Harvard U, tchavice@gmail.com
Colm
Sweeney, NOAA ESRL, colm.sweeney@noaa.gov
Arlyn
E.
Andrews, NOAA ESRL, arlyn.andrews@noaa.gov
Ed
J.
Dlugokencky, NOAA ESRL, ed.dlugokencky@noaa.gov
Pieter
Tans, NOAA ESRL, pieter.tans@noaa.gov
Adam
Hirsch, NOAA ESRL, adam.hirsch@noaa.gov
Doug
Worthy, Environment Canada, doug.worthy@ec.gc.ca
Janusz
Eluszkiewicz, AER, jel@aer.com
Thomas
Nehrkorn, AER, tnehrkor@aer.com
Anna
Michalak, U Michigan, amichala@umich.edu
Hanqin
Tian, Auburn U, tianhan@auburn.edu
Steven
C.
Wofsy, Harvard U, swofsy@seas.harvard.edu
(Presenting)
Non-CO2 greenhouse gases play a central role in the Earth’s energy balance, with methane and nitrous oxide combined accounting for almost half of the radiative forcing due to CO2 alone. Here we present results from synthesis activities combining measurement and model techniques from multiple groups assessing the spatial and temporal distribution of methane and nitrous oxide emissions in North America. Measurements from NOAA, Environment Canada, and independent aircraft campaigns are used in conjunction with a receptor-oriented Lagrangian particle dispersion model to assess bottom-up emissions estimates. Results and preliminary findings include: 1) Anthropogenic methane emissions in the US are larger than currently reported by the EPA. 2) Wetland emissions from the Hudson Bay lowlands have greater strength and different seasonality than predicted from a bottom-up model. 3) Agricultural nitrous oxide emissions show strong seasonality with peak emissions 2.5-3 times larger than predicted.
Presentation Type: Poster
Poster Session: Carbon Cycle Science
NASA TE Funded Awards Represented:
Wofsy, Stev
Spatial and Temporal Distributions of Sources for non-CO2 Greenhouse Gases (CH4, CO, N2O) over North America
Wofsy, Steven
Integrated Analysis of Regional and Continental Carbon Budgets for CO2 and CO in North America, Using Data from Remote Sensing, from Stations Measuring Concentrations and Fluxes, and Other Sources