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Fig. 2. Mean WVA uptake fluxes (± s.e.m.; vertical error bars), expressed
both as the exothermic heat signal (HFWVA; µW) and the uptake
flux (µg h1), plotted as a function of the steady-state
relative humidity in the calorimetric cell (RHss in %).
RHss values are calculated as indicated in the text and the
data points represent the means for each RH-step (± s.e.m.; horizontal
error bars). Water vapour uptake in P. lagurus increases linearly
with relative humidity up to 92% RH, but shows asymptotic kinetics above this
value. N=4-16.