AMF Deployment, Shouxian, China
Location: 32° 33' 30.18" N, 116° 46' 55.02" E
Altitude: 22.7 meters
In 2008, the ARM Mobile Facility (AMF) was deployed in China to acquire essential cloud, aerosol, radiative, and meteorological measurements for the Study of Aerosol Indirect Effects in China. High concentrations of aerosol particles in the region may influence the atmosphere across the Pacific Rim, especially the radiation balance and cloud properties. Preliminary analyses of multiple satellite data sets over China indicate complex and unique aerosol indirect effects, which impact cloud reflectivity and precipitation processes. Both in-situ measurements and independent ground-based remote sensing data are needed to verify the satellite findings and gain a deeper understanding of these effects.
The primary AMF site was located at Shouxian, approximately 500 km west of Shanghai. A supplemental facility with a reduced complement of AMF instruments obtained measurements at an observatory on the shores of Lake Taihu, just 96 km west of Shanghai. Both of these facilities operated from May through December 2008. In addition, an ancillary facility with a subset of AMF instruments was established to the north, to obtain comparative measurements for several months at a time in locations with different environmental conditions. From April through May, the ancillary facility operated at a location in the semi-desert conditions of Zhangye, in north-central China. The ancillary facility then moved to Xianghe on the northeast coast. It operated in this primarily agricultural environment from June through the end of the AMF deployment in December.
Measurements obtained at all the AMF sites during the 8-month deployment in China will help scientists to validate satellite-based findings, understand the mechanisms of the aerosol indirect effects in the region, and examine the roles of aerosols in affecting regional climate and atmospheric circulation, with a special focus on the impact of the East Asian monsoon system. Beginning in 2004, a precursor study, East Asian Study of Tropospheric Aerosols: An International Regional Experiment, was conducted until the present.