# Presentation: 531588

## DOE Atmospheric Science Program

- Progress Report on Aerosol Radiative Forcing of Climate
- BERAC Meeting                      April 20, 2005
- Peter Lunn
- Program Director for Atmospheric Science

**Department of Energy - Office of Science**

## Program Goals and Focus

- Long-Term Goal --- developing comprehensive understanding _and representation_ of the atmospheric processes that control the transport, transformation, and fate of energy related trace chemicals and particulate matter.

- Focus --- aerosol radiative forcing of climate, i.e., aerosol chemical, microphysical, and optical properties, including their geographical and vertical distribution and the rates and mechanisms of their evolution:
- Sources of particles and gaseous precursors
- Transport of particles and gaseous precursors, local-to-regional scales with scientific and programmatic connections to larger scales
- Concentrations of gas-phase aerosol precursors
- Characterization of aerosol properties
- Aerosol transformations
- Atmospheric radiation (characterization of aerosol influences)

## Deliverables

- Science Steering
- Committee

- Working Groups

- Field Campaigns

- Partnerships

**Deliverables**

- Science Team Meeting

- BERAC Report

- Research
- Announcement

**Science Team**

## Science Team

-    Aerodyne
-    Argonne
-    Boston College
-    Brookhaven
-    Cal Tech
-    Desert Research Inst.
-    _EPRI_
-    _Los Alamos_
-    Lawrence Berkeley
-    Livermore
-    MIT
-    NASA Langley
-    NCAR

-    NOAA CMDL
-    _NRL_
-    _ORNL_
-    PNNL
-    _SUNY Albany_
-    SUNY Old Westbury
-    _TropoChem_
-    UC Irvine
-    UCLA
-    UC Riverside
-    U Colorado
-    _U Miami_
-    U Minnesota

## Science Steering Committee

- 	Peter H. Daum           		Brookhaven
- 	J. Christopher Doran    		PNNL
- 	Jeffrey S. Gaffney      		Argonne
- 	Steven J. Ghan          		PNNL
- 	Chris A. Hostetler      		NASA Langley
- 	Sasha Madronich         		NCAR
- 	Luisa T. Molina         		MIT
- 	John H. Seinfeld        		Cal Tech
- Chairman and Chief Scientist:    Stephen E. Schwartz     Brookhaven

## Working Groups

-    Gas-Particle Interaction
-    New Particle Formation
-    Aerosol Optical Properties
-    Cloud-Aerosol Interactions

-   MASE 2005
-   MAX-Mex 2006
-   Houston 2006
-   St. Louis 2007

-    Instrument Development
-    Laboratory Studies
-    Field Studies
-    Model Development and Evaluation

## 		Field Campaigns

-  	     	_MASE_:    MArine Stratus Experiment
-  	_MAX-Mex_:    Megacity Aerosol eXperiment – Mexico City
- 	   Houston 2006 and St. Louis 2007 Under Consideration

## MASE

- 	 _July 2005 @ Point Reyes, California_
- 	Aerosols and Marine Stratus Clouds.
- 	Indirect Aerosol Effects.
- 	Cooling.
- 	Very Large Uncertainties.
- 	Connections between aerosol loading and reflectivity.
- 	Connections between aerosol properties and precipitation.
- 	Ground-based Measurements.
- 	G-1 and Twin Otter Airborne Measurements.

## MAX - Mex

- 	 _February-March 2006 @ Mexico City_
- 	Megacity Aerosol Exportation to the Global Environment.
- 	Characterize the Chemical, Physical, and Optical Properties of Aerosols from a Megacity Source and the Production of SOAs and Inorganic Aerosols.
- 	Evaluate the Rates and Yields of both Primary Particle Aging and Secondary Aerosol Conversions from a Megacity.
- 	Extensive Ground-based Measurements.
- 	G-1, C-130, and DC-8 Airborne Measurements.

## Partnerships

- 	ARM			MASE – AMF Deployment
- 	NRL and Cal Tech	MASE – CIRPAS Aircraft
- 	NASA Langley           	Cost Sharing and NASA Aircraft
- 	NSF  MIRAGE-2006  and  Molinas’ MCMA-2006
- 	NARSTO         Coordination and Data Archiving
- 	CCPP	           Incorporation of Models and Parameterizations
- 			     developed by ASP

## Program Deliverables

- 	        _Models and parameterizations_ that effectively represent 		        aerosol properties and processes required to compute 	  	        aerosol radiative forcing of climate in large-scale climate 		        models, together with an assessment of their accuracy and 	  	        limitations.
- •  Relating** **_aerosol light scattering and absorption_**,** including dependence on relative humidity and other controlling variables, to aerosol chemical and microphysical properties.
- •  Relating _cloud microphysical properties_ and dependence on controlling variables, to concentration, and chemical and microphysical properties of pre-cloud aerosol.
- •  Relating _evolution of aerosol composition and microphysical properties_, and optical and cloud nucleating properties, to concentrations of precursor gases, properties of the pre-existing aerosol, cloud processing, and other controlling variables.

## Program Website and Handout

- 		    	www.asp.bnl.gov
- •  Presentations from the January 2005 Science Team Meeting
- •  Scientific and logistical details of planned field campaigns
- 	_Handout_
- •  Draft deliverables document, including specific science deliverables in each functional area of the program, in support of program deliverables