Should light wind and windy nights have the same temperature trends at individual levels even if the boundary layer averaged heat content change is the same?

Details Should light wind and windy nights have the same temperature trends at individual levels even if the boundary layer averaged heat content change is the same? Should light wind and windy nights have the same temperature trends at individual levels even if the boundary layer averaged heat content change is the same?

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3221813p&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 21, CiteID L21813

Physics

11

Atmospheric Processes: Boundary Layer Processes, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Land/Atmosphere Interactions (1218, 1631, 1843), Atmospheric Processes: Turbulence (4490)

Scientific paper

Long-term climate trends of surface air temperature should not be expected to have the same trends for light wind and stronger wind nights, even if the trends in the boundary layer heat fluxes were the same. Parker (2004) segmented observed surface temperature data into lighter and stronger wind terciles in order to assess whether the reported large-scale global-averaged temperature increases are attributable to urban warming. We conclude, however, that trends at an individual height depend on wind speed, thermodynamic stability, aerodynamic roughness, and the vertical gradient of absolute humidity. We present an analysis to illustrate why temperature values at specific levels will depend on wind speed, and with the same boundary layer heat content change, trends in temperature should be expected to be different at every height near the surface when the winds are light, as well as different between light wind and stronger wind nights. This introduces a complexity into the assessment of long-term surface temperature trends that has not been previously recognized.

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