Physics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3414811l&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 14, CiteID L14811
Physics
3
Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Global Change: Water Cycles (1836), Hydrology: Hydrometeorology, Cryosphere: Thermodynamics (1011, 3611, 8411), Planetary Sciences: Fluid Planets: Meteorology (3346)
Scientific paper
Theoretical analyses are provided to understand the effects of the atmospheric circulation in the relationships between water vapor and temperature. Relative humidity (r) analysis indicates that when temperature variation range ΔT ≡ T 2 - T 1 is larger than D r ≡ 13 ln(r 1/r 2), a measure of the decrease of r over the temperature range, strong positive correlations can be expected between water vapor and temperature. Dynamic process analysis reveals, with expressing the change of water vapor as ΔW = fΔT + B (f > 0 and B represents atmospheric dynamic effect), the dual effects of the atmospheric circulation in the water vapor-temperature relationships. When ΔT is large so that fΔT > |B|, the thermodynamic effect of the earth-atmosphere is more important; the thermally induced atmospheric circulation and the evaporation tend to establish strong positive correlations between water vapor and temperature. When ΔT is small so that fΔT < |B|, the dynamic effect of the atmosphere is more important; the dynamic water vapor convergence and divergence make water vapor and temperature have weak correlations.
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