1. International Workshop on Semi-Arid Land Surface-Atmosphere Interaction August 9-13, 2007, Lanzhou, China

2. Background Arid and semi-arid areas comprise about 30% of earth surface Changes in climate and climate variability will likely have a significant impact on these regions. Semi-arid land surface- atmosphere interaction is not only one of the key issues in climate change research, it has also become a common Concern of governments and people. This workshop is intended to review recent progress in understanding semi-arid land surface- atmosphere interaction and provide a forum to promote international cooperative studies on semi-arid climate change.

3. Key Topics of the workshop are: Land surface-atmosphere interactions Dust aerosol effect on hydrological cycle Climate change monitoring in semi-arid environment International cooperation on semi-arid research International Scientific Committee: Chair: Prof. Congbin Fu (Institute of Atmospheric Physics, Chinese Aca demy of Sciences, China)

4. Members: Prof. T. Koike (University of Tokyo, Japan) Prof. R. Dickinson (Georgia Institute of Technology, USA) Prof. Zewei Lu （ National Natural Science Foundation of China ） Prof. Jifan Chou （ Lanzhou University, China ） Prof. Jianping Huang (Lanzhou University, China) Dr. Kaz Higuchi (Environment Canada, Canada) Prof. Qiang Fu (University of Washington, USA) Prof. Jie Song (Northern Illinois University, USA) Prof. Zongliang Yang (University of Texas, USA)

5. Co-sponsors: Asia Pacific Network for Global Change Research (APN) Institute of Atmospheric Physics, Chinese Academy of Sciences Lanzhou University Monsoon Asia Integrated Regional Study (MAIRS-ESSP) National Basic Research Program of China (2006CB400501 Project) National Natural Science Foundation of China

6. Local host: Prof. Jianping Huang College of Atmospheric Sciences, Lanzhou University E-mail: hjp@lzu.edu.cn

7. Workshop Secretary: Ms. Yang Ying Information Officer MAIRS-IPO Institute of Atmospheric Physics Chinese Academy of Sciences P.O.Box 9804, Beijing 100029 P.R.China Tel:+86-10-62031641 Fax:+86-10-62036133 E-mail: yangying@mairs-essp.org Ms. Xiaodan Guan College of Atmospheric Sciences, Lanzhou University 222# TianShui ， Southroad, Lanzhou,730000,P.R.China Tel: +86-931-8914282 Fax: +86-931-8914278 E-mail: guanxd05@lzu.cn

8. Language: The official language for the workshop sessions will be English. No translation service will be arranged.

9. Deadline of Abstract Submission: The format for extend abstract please find on the workshop homepage and the deadline for abstract submission is May 20, 2007

10. Excursions and Social Program: Visits to facilities of the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) will be organized. Excursions to Dunhuang will be arranged. Detail will be Announced afterwards.