On the coupling strength between the land surface and the atmosphere: From viewpoint of surface exchange coefficients

Details On the coupling strength between the land surface and the atmosphere: From viewpoint of surface exchange coefficients On the coupling strength between the land surface and the atmosphere: From viewpoint of surface exchange coefficients

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3610404c&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 10, CiteID L10404

Physics

Geophysics

17

Global Change: Land/Atmosphere Interactions (1218, 1843, 3322), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), History Of Geophysics: Hydrology, Hydrology: Energy Budgets, Hydrology: Land/Atmosphere Interactions (1218, 1631, 3322)

Scientific paper

This study addresses the land-atmospheric coupling strength by using long-term AmeriFlux data from a wide range of land covers and climate regimes to reconstitute the surface exchange coefficient, C h , which governs the total surface heat fluxes. For spring and summer, results show stronger coupling for tall canopy with C h values ten times larger than for shorter vegetation. Observed C h are then compared to values from the Noah land model. Results indicate that Noah underestimated (overestimated) C h for forest (grass and crops), implying an insufficient (too efficient) coupling for tall canopy (short canopy). This discrepancy is attributed to the treatment of the roughness length for heat. With modest adjustments, the Noah model can reproduce the observed C h . This study highlights the crucial role of treating the surface exchange processes in coupled land/weather/climate models and the need to use long-term flux data for different vegetation types and climate regimes to assess and mitigate their deficiencies.

Affiliated with

Also associated with

No associations

Rating

On the coupling strength between the land surface and the atmosphere: From viewpoint of surface exchange coefficients does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the coupling strength between the land surface and the atmosphere: From viewpoint of surface exchange coefficients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the coupling strength between the land surface and the atmosphere: From viewpoint of surface exchange coefficients will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-811170