Production mechanism, number concentration, size distribution, chemical composition, and

optical properties of sea spray aerosols

Nicholas Meskhidze, Markus Petters and Kostas Tsigaridis

Steering Committee:Tim Bates, National Oceanic and Atmospheric Administration Colin O’Dowd, National University of Ireland GalwayJeff Reid, US Naval Research Laboratory, Marine Meteorology DivisionErnie R. Lewis, Brookhaven National Laboratory

Accommodations

A couple of things in the binders

Workshop agenda Campus map List of restaurants

Also: Wireless access W2 forms for domestic participants Copy of a passport and/or visa for internationals

1. Identify the most critical open questions and develop a strategic science prioritization plan for conducting and facilitating novel research regarding sea spray aerosol

2. Identify the pressing science questions and rank them by their highest impact on reducing the current uncertainty ranges

3. Prioritize the research agenda and identify areas of investigation by the magnitude of their impact on proposed science questions

4. Rank the difficulty/feasibility for resolving each processes using currently available measurement and remote sensing techniques and modeling approaches

5. Identify future strategies, including new measurement techniques and long-term clean oceanic atmospheric aerosol measurements which can provide significant constraints on different processes

6. Disseminate workshop findings and results in a form of a white paper.

Objectives

June 4: Morning – Participants travel to Raleigh 1:00 – Registration at the ballroom of the Brownstone Hotel1:30 – 2:00 PM Welcome (some logistical issues)2:00 – 3:00 Prof. Gerrit de Leeuw : “Sea spray Aerosol Production:

an overview of current knowledge”3:00 – 3:30 Coffee break3:30 – 5:00 Overview vision/breakout group introductions5:30 - Poster showing with food

June 5: 7:30 -7:45 AM Pick up at the Hotel and drive to the Jordan Hall, NCSU campus8 AM: Breakfast (at Rm#1216 Jordan Hall II)

8:30 – 8:40 Outline of charge to working groups (please sign up for your preferred breakout session(s)). Breakout sessions by discipline: Remote Sensing, Regional and Global Modeling, Laboratory Measurements, and Field Measurements (we need volunteers to chair the sessions)8:40 – 10:30 Breakout charge one – State of the science. Working groups based on the historical Prospective and Identification of Current Problems10:30 – 10:50 Coffee break10:50 – 12:30 Breakout group presentations with plenary discussion

12:30 – 2:00 Lunch

Give brief overview of Give specific examples of different measurements/modeling/ remote sensing, approaches that were taken, techniques that were used, lessons that were learned, and science that was advanced.What were successes and difficulties of the field campaigns, lab measurements, remote sensing and modeling?Which important parameters were missing? Where the measurements specifically designed/representative of the marine conditions?What were the conclusions?In which parts do we have consensus and which parts contradict?

Charges to the working groups

Can we revalidate some of the data? If yes, what can be used as a benchmark?

Can we develop more authoritative method to reduce the uncertainty?

15 min. presentation + 10 min discussion.

Write-up (will help with the white paper)

2:00 – 3:30 Breakout charge two – Ways forward. New working groups will be created based on the themes: Source function, Budget (transport and removal processes), Aging (size distribution dynamics, CCN, IN), and Optical Properties. Charge: identify the pressing science questions, future strategies, including new modeling and measurement techniques

3:30 – 3:50 Coffee break3:50 – 5:30 Breakout group presentations with plenary discussion5:30 – 6:00 Drive back to the hotel After 6 PM Dinner on you own

Charge to Breakout “Ways Forward”

• What are the type of studies that need to be done to make progress? (e.g. new satellite mission, field study, lab study ...)

• What new techniques or approaches are needed to overcome the current limitations?

• What are the limitations of the current techniques (i.e., signal to noise ratio, different methodologies…) ?

• Do we need cheap “lab” measurements and many of them, or one or two big field campaigns (VOCALS style).

• Start thinking about prioritization (what should we do first, what does give us the biggest benefit in a challenging funding environment).

Jun 6: 7:30 – 7:45 AM Pick up at the Hotel and drive to the Jordan Hall, NCSU campus8 AM: Breakfast (at Rm#1214 Jordan Hall II) 8:30 - 9:00 Breakout charge three – Workshop synthesis. Breakout groups return to their discipline. Brief discussion on prioritization perspectives.9:00 – 10:30 Prioritization matrix10:30-10:50 Coffee break10:50 – 12:00 Summary and plenary discussion

12:00 Meeting adjourned

Recommendation Current understanding Impact if achieved Difficulty Resources needed#1. Mass concentration low med med lowComments

#2. Number concentration

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#3. Chemical composition

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#4.Size resolved mass

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#5. Size resolved number

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#6. Size resolved compositionComments

Source function

Thank you!