Fig. 4.

Seasonal variations of VP and RH. (A) Plot of the monthly seasonal cycle of indoor VP in millibars and indoor RH in percent. Data are living room measurements taken during 1993–1995 in 8 dwellings in Gothenburg Sweden (31). (B) Plot of the monthly seasonal cycle of outdoor VP in millibars and outdoor RH in percent at the surface averaged for 130–70°W and 30–60°N. Data are National Center for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis for 1968–1996 (32) and were provided by the National Oceanic and Atmospheric Agency/Oceanic and Atmospheric Research/Earth System Research Laboratory, Physical Science Division, Boulder, CO, from their web site at www.cdc.noaa.gov/.