Observations

Representing an area of 111 km by 60.8 km, five sites will be located in the Amazon Basin. Wind speeds in this area are typically 10 to 30 kph at an altitude of 1 km.

In response to the science questions, the experimental design will characterize the region in its natural state and in states perturbed by regional and global human activities. Five ground sites are strategically located around the Manaus region (see the map for more detailed information on the measurements at each location):

Two intensive operational periods—one in February-March, during the wet season, and another in September-October, at the end of the dry season—will be conducted to collect additional observations. During these intensive periods, aerial measurements will complement the ground-based measurements for two six-week periods. The ARM Aerial Facility (AAF) G-1 will be deployed for in situ measurements of trace gas and aerosol properties beginning 15 February and on 1 September. The G-1 will be joined by the German High Altitude and Long Range Research Aircraft, or HALO, a Gulfstream V, in late 2014 to collect measurements of aerosol and cloud properties.