.|  Baltimore Ecosystem Study
Meteorological Research Projects

Measurement and modeling of local-scale energy and mass exchanges in urban environments
  • John Hom, USDA Forest Service
  • Sue Grimmond, Department of Geography, Indiana University
  • Gordon Heisler, USDA Forest Service
  • David Nowak, USDA Forest Service
The objective of this research is to conduct local-scale meteorological observations of surface-atmosphere energy and mass exchanges. The observations will include above-canopy flux measurements at a height of 30+ m in order to obtain an integrated response from a neighborhood. The variables to be observed are temperature, relative humidity, wind, the components of the energy balance (that is, the radiation balance, sensible heat flux, and latent heat flux which provides evaporation as mass of water), CO2, concentrations and CO2 flux. These observations provide insight into biophysical exchange processes, and the data collected will allow surface-atmosphere exchange models to be evaluated

This study got under way in 2000 with an agreement, arranged by John Hom for Forest Service use of the Cub Hill fire tower as an instrument platform. Instrument checks have been carried out to ascertain any interference between the meteorological instrumentation and police radio transmission. There was no interference either way. This is important for use of the fast response, eddy-correlation instruments that will be used for flux measurements. Installation of the full suite of instruments is underway in winter and spring of 2001. The next step will be evaluation of initial data collection, particularly the eddy covariance measurements.

To date the study has received funding from the USDA Forest Service Global Climate Change Program. Funding from NSF to support the involvement of Indiana University is anticipated. Additional funding is being sought.