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North American Black Carbon
Emissions Estimation Guidelines
2015 International Emissions Inventory Conference
San Diego,CA
April 12-16,2015
John Koupal,Paula Fields Simms
Eastern Research Group
Orlando Cabrera-Rivera
Commission for Environmental Cooperation1

Project Overview
 CEC Project “North American Black Carbon Emission
Inventory Guidelines” initiated in November 2013
 Objectives
– Thorough review and comparison of data and methods
– Establishment of consensus methodologies to harmonize and
improve North American black carbon emissions inventories
– Incorporation of these into a user-friendly guidance document
 Steering Committee
– Orlando Cabrera-Rivera, CEC
– Luis Conde Alvarez, Instituto Nacional de Ecología y Cambio Climático
(INECC)
– Terry Keating, U.S. EPA
– John Moritz & Francois Lavallee, Environment Canada
2

Project Team
 ERG
– John Koupal - Onroad
– Paula Fields Simms–Residential
– Richard Billings–Marine/rail/aircraft
– Rick Baker– Nonroad
– Regi Oommen– Industrial/Energy
– Ted Hogan– Expert Consultations
– Gopi Manne– Literature Review / Guidelines Document
 Veronica Garibay-Bravo (Consultant/Querétaro, Qro) - Mexico
Lead
 Dr. Joyce Penner (Consultant/Univ. of Michigan) – Biomass
3

Project Tasks
 Task 1: Review existing black carbon data and
methodologies; initial recommendations for North
America (Complete)
 Task 2: Solicit expert review; consensus methods to
harmonize and improve North American black
carbon emissions inventories (Complete)
 Task 3: Develop guidance document (Draft under
review; Final Spring 2015)
4

Guiding Principles
 Guidance document should be pragmatic about differences
between countries in resources, data, and policy needs
 Should identify best-practice approaches, consider how
each country can adopt, and include as alternatives or a
staged approach for short-term adoption
 Recognize need to identify low-cost recommendations for
improving black carbon inventories in Mexico
 The approach to developing emissions inventories depends
on the final use of the inventory (“use cases”)
 The guidance document must ultimately be understood
and accepted by end users
5

Major Sectors and Subsectors
 Biomass Burning
– Open Burning (e.g. Wildfires)
– Agricultural Burning
 Mobile Sources
– On-road
– Non-road
– Locomotives
– Marine
– Aviation
6
 Residential
– Cookstoves, etc.
 Industrial/Energy
– General
– Brick kilns (Mexico)
 Other Sources
– Commercial cooking/
charbroiling
– Cremation
– Structure and vehicle fires
– Municipal solid waste
burning

Task 1: Review & Initial
Recommendations
 Literature Search and Review
– Databases, abstracts, documents
– Focused on major, comprehensive inventories, including
underlying particular matter (PM) inventories, for North
America & Europe
 Divided review into major sectors and primary subsectors
– Summarized BC and PM inventory approaches
– Evaluated North American approaches relative to Europe
– Following IPCC approach, developed general
recommendations based on “Tiers”
7

Master Candidate Document List
 On-line databases  8,000 studies
 2004 and later  1,200 studies
 Available abstract, applicable title  600 studies
 Final list for review  140 studies
 Focused on Comprehensive Studies:
8
Country Black Carbon Inventory Underlying PM Inventory
Canada Assessment of Emissions and Mitigation Options
for Black Carbon,Arctic Council, 2011
• NPRI
U.S. EPA Report to Congress, 2012 • 2002, 2005,2011 U.S.NEI
• RPO Inventories (Biomass)
Mexico Supporting National Planning of Short-lived
Climate Pollutants in Mexico, 2013
2008 Mexico NEI
Europe EMEP/EEA Air Pollutant Emission Inventory Guidebook,2013
Global • A Technology-based Global Inventory of Black and Organic Carbon Emissions
from Combustion (Bond 2004)
• Extension of the GAINS model to include SLFCs (Heyes 2011)

Initial Observations & Judgments
 BC guidelines need to focus on underlying PM emission inventories
 Estimation of BC inventories by speciations of bottom-up PM
emissions is the global standard for nearly every sector, as follows:
 Emissions data can often be shared across countries, accounting for
country-specific controls and factors.
 Activity data are country-specific, and generally obtained from data
compiled outside of the agencies responsible for emission inventory
development.
 The guidelines should therefore present best practice emission factors
by individual sector, to allow inventory developers to focus resources
on gathering country-specific activity data.
9

Methods Evaluation
 North American approaches evaluated vs. EMEP/EEA Tiers (1, 2, 3)
 Example evaluation matrix:
10
Sector/Subsector: Mobile Sources/On-Road
Euro
Tier 1
Euro
Tier 2
Euro
Tier 3
< Tier 1 Tier 1 Tier 2 Tier 3 > Tier 3
Method
Aggregate fuel
based PM
Refined fuel-
based PM w/
speciation
Detailed bottom-up
PM w/speciation
Canada
ACTF;
Mexico NEI
(MOBILE6)
EPA RTC
(MOVES
calculates
EC directly)
Emission
Factors
Single fuel-
based factor
Technology-
specific fuel-
based
BC/EC emission
factors by vehicle
class, model
year/standard
Canada ACTF
& Mexico NEI
(MOBILE6)
EPA RTC
(MOVES)
Activity
Total fuel
consumed
Fuel consumed
by technology
VMT by vehicle
class, roadway,
speed
EPA RTC
(MOVES);
Canada
ACTF;
Mexico NEI
Speciation
N/A
Technology-
specific factor
Technology-
specific factor
Canada
ACTF;
Mexico NEI
(SPECIATE)
EPA RTC
(MOVES
w/speciation
by activity)

Initial Recommendations
 Develop initial recommendations for North American Tiers based
on data available in Canada, U.S. and Mexico – example:
11
Sector/Subsector: Mobile Sources/On-road
Recommended
North American Tier 1
Recommended
Recommended
Method
Aggregate fuel-based approach, based
on a single national estimate of fuel
consumption (by fuel type, i.e. gasoline,
diesel, CNG, etc.) by calendar year. Off-
model calculation.
Refined fuel-based approach, based on
estimates of fuel consumption by fuel
type and vehicle class, (i.e. car, light
truck, bus, heavy truck). Off-model
calculation.
Detailed activity-based approach, using
MOVES customized to individual country
emission standards and using country-
specific data on vehicle activity etc.
Emission
Factors
MOVES aggregated to a single fuel-
based black (elemental) carbon emission
factor, by calendar year. For Canada and
Mexico, apply MOVES International
approach to adjust for differences in
vehicle emission standards
MOVES aggregated to a fuel-based
black (elemental) carbon emission
factor, by vehicle class and calendar
year. For Canada and Mexico, apply
MOVES International approach to adjust
for differences in vehicle emission
standards
Use MOVES directly to estimates black
(elemental) carbon emission factor. For
Canada and Mexico, develop MOVES
International to account for differences in
vehicle emission standards. Customize
model with country-specific inputs for
VKT, average speeds, fuels, vehicle age,
and meteorology
Activity
Total fuel consumed – by fuel type only
(gasoline, diesel, CNG, etc.)
Fuel consumed by vehicle class and
calendar year
VMT or VKT by vehicle class, roadway
and average speed
Speciation
Not needed, if MOVES elemental
carbon emission factor is used
Not needed, if MOVES elemental
carbon emission factor is used
Not needed, if MOVES elemental carbon
output is used

Task 2: Expert Consultations
 Expert panel recruited for coverage by emissions
sectors, countries
 Results of Task 1 shared for review
 Series of webinars held in Fall 2014 to solicit input
– Online surveys sent prior to each webinar
 Meeting with Mexico Panel Members & INECC held
in Mexico City
 Written comments also requested
12

Expert
Panel
Members
13
Name Employer/Organization
José Andrés Aguilar INECC (Mexico)
Luisa Molina Molina Center of Energy and the Environment (Mexico)
John Crouch Hearth, Patio and Barbeque Association (U.S.)
Michelle Bergin Duke University (U.S.)
Santa Centeno INECC (Mexico)
Xochitl Cruz Nunez UNAM (Mexico)
Beatriz Cardenas Comision Ambiental de la Megalópolis (Mexico)
Luis Gerardo Ruiz Suarez UNAM (Mexico)
Carlo Trozzi Techne Consulting (Italy)
Karin Kindbom IVL Swedish Environmental Research Institute (Sweden)
Vankatesh Rao U.S. EPA/OAR (U.S.)
Darrell Sonntag U.S. EPA/OAR (U.S.)
Nancy French Michigan Tech Research Institute (U.S.)
Jessica McCarty Michigan Tech Research Institute (U.S.)
Wei Min Hao U.S. Forest Service (U.S.)
Jim Jetter U.S. EPA/ORD (U.S.)
Bob Yokelson University of Montana (U.S.)
Min Huang Caltech/JPL (U.S.)
Don Stedman University of Denver (U.S.)
Serena Chung Washington State University (U.S.)
Sean Raffuse Sonoma Technology, Inc. (U.S.)
Fang Yan Argonne National Laboratory (U.S.)
Brooke L. Hemming U.S. EPA/ORD (U.S.)
Edward Hyer Naval Research Laboratory (U.S.)
Abraham Ortinez INECC (Mexico)
Jason Blake Cohen National University of Singapore (Singapore)
Peter Sheldon Global Fire Monitoring Center (Germany)
Joshua Schwarz CIRES/NOAA (U.S.)
Steigvile Bycenkiene Center for Physical Sciences and Technology (Lithuania)
Savitri Garivait JGSEE-KMUTT (Thailand)
Matthew Johnson Carleton University (Canada)

Expert Panel Input - Highlights
 Reflect that speciation factors are a major source of
uncertainty in BC inventories
 Address uncertainty
 Reflect recent updates in Mexico (e.g. 2013 SNAP)
 Address temporal resolution
 Include newer studies, esp. for Biomass
 Since EPA Report to Congress, updated methods contained in the biomass
burning section of the U.S. NEI for 2008 and 2011
 Add Municipal Solid Waste burning as a subsector
14

Task 3: Develop Guidelines
 Guidelines for practitioners to produce BC inventories
for major subsectors
 Approaches provided for Tier 1 / 2 /3 , depending on
purpose of inventory and data availability
 For each Tier, sources of activity, emission factor and
speciation data identified for Canada, U.S. and Mexico
 Schedule
– Draft complete – under review
– Final Spring 2015
15

Guidance Document Outline
 Overview of Methods Review & Expert Panel Input
 Use of the Guidelines
– Inventory Use Cases
– Considerations: Speciation, Spatial/Temporal Resolution
– Organization: Tier Framework
 Black Carbon Estimation Methods (by subsector)
– Source Category Description
– Tie r 1, Tier 2 & Tier 3 Methods for estimating emissions
– Tier 1, Tier 2 & Tier 3 Data Sources for Canada, United States
& Mexico: Activity, Emissions Factors, Speciation Factors
 Emissions Data Management
 Validation & Uncertainty
 Recommendations for Further Research
16

Example :
Recommended Data
Sources by Country & Tier
(Agricultural Burning)
17

Recommended Black Carbon Inventory
Improvements - Highlights
 Develop BC emission factors directly
– Current speciation approach increases error
 Biomass
– Improved satellite instruments
– Spatially accurate fuel load data
– Account for moisture
 Onroad
– Improve vehicle activity data in Mexico & Canada
– Adapt MOVES emission rates to Mexico & Canada
 Nonroad
– Develop standardized source of population & activity in
Mexico & Canada
– Develop more representative emissions factors for aircraft,
marine vessels and locomotives18

Recommended Black Carbon Inventory
Improvements – Highlights, Cont.
 Brick Kilns
– Develop brick production & efficiency estimates by
region in Mexico
– Develop emission factors by wood & fuel oil
 Residential
– Conduct surveys of wood use by municipality
– More representative emissions factors for open fires
and cookstoves
19

Summary
 The Commission for Environmental Cooperation (CEC) is
sponsoring the development of Black Carbon emissions
estimation guidelines for North America
 Guidelines are based on review of Black Carbon &
underlying PM inventories in North America, Europe and
Asia
 Guidelines suggest methods and data sources for major
emission sectors/subsectors in Canada, Mexico and the
United States
 Following IPCC template, 3 Tiers are defined based on
inventory purpose and data availability
 Final guidelines will be available Spring 2015
20

Contacts
 Orlando Cabrera-Rivera (CEC) ocabrera@cec.org
 John Koupal (ERG) john.koupal@erg.com
21

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North American Black Carbon Emissions Estimation Guidelines

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