ACE-Asia Scientific Steering Committee Meeting Report

12 November, 1999 Kunming, China

SSC Members in attendance:

Wang Mingxing, China
Shi Guang-yu, China
Tom Choularton, UK
Tim Bates, US
Kimitaka Kawamura, Japan
Young J. Kim, Korea
Greg Carmichael, US
Tom Cahill, US
Si-Chee Tsay, US
Rich Arimoto, US
George Lin, Taiwan
Mitsuo Uematsu, Japan
John Merrill, US
John Seinfeld, US
Jorgen Jensen, Australia
Daniel Martin, France
Richard Dirks, US
Barry Huebert, US, Chair

The SSC discussed several issues:
1. After the US-NSF had the Large Experiment Overview Proposal for AA-SEC (the 2001 spring intensive experiment) reviewed, they decided to delay a decision on funding the NCAR C-130 flights until a new low turbulence inlet (LTI) had been tested in flight and shown to increase the ability to sample large particles. This is because the LTI will make it possible to chemically and physically characterize a much larger part of the dust and sea salt distributions than existing inlets can. Thus, if the LTI cannot be successfully demonstrated by August, 2000, the C-130 portion of the intensive experiment will be delayed (probably for one year), while the problems in this new inlet are overcome. 

This presents a dilemma for ACE-Asia, since the C-130 is one of the major platforms for sampling aerosols above the surface. The SSC discussed the possibility of delaying the intensive experiment until 2002, to ensure that the C-130 would be ready to participate. Although a delay would have significant pros and cons, the SSC decided to proceed with planning for an intensive experiment in the spring of 2001. It was generally felt that so many plans are in place for 2001 that most countries would prefer to retain our original schedule. Every possible effort will be made to successfully test the LTI in the spring and summer of 2000.

2. The reviewers of the NSF proposals indicated that since a primary goal of ACE-Asia is to understand aerosol radiative forcing of climate, the first intensive experiment should have more of an emphasis on radiative closure and direct forcing. The four components had been organized in such a way that AA-SEC would focus primarily on surveying Asian aerosols and measuring critical process rates. In view of this change in emphasis and the lack of progress in designing a separate direct forcing intensive experiment, the SSC decided to eliminate the separate direct forcing component. The ACE-Asia Prospectus is to be rewritten with just three components, with a more emphasis on radiative forcing in the 2001 intensive.

3. Since the revised Prospectus will form the basis of many proposals, the SSC decided that a new version should be posted to the Web by early January, 2000. (That has been done.)

4. We discussed the ACE-Asia Data Policy. The SSC once again endorsed the policy that all data will be made public within one year after collection. 

5. We discussed the time and location of the next ACE-Asia Science Team Meeting. Barry Huebert offered to host it in Hawaii, in the fall of 2000. This was tentatively agreed to, pending a review of dates.