Experimental evidence shows that temperature‐humidity (
Effect of varying atmospheric conditions on methane boundary-layer development in a free flow domain interfaced with a porous media domain: Original Research Article: Effect of varying atmospheric conditions on methane boundary-layer development
- NSF-PAR ID:
- 10046256
- Publisher / Repository:
- Wiley Blackwell (John Wiley & Sons)
- Date Published:
- Journal Name:
- Greenhouse Gases: Science and Technology
- Volume:
- 8
- Issue:
- 2
- ISSN:
- 2152-3878
- Page Range / eLocation ID:
- 335 to 348
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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Abstract ) similarity in the atmospheric surface layer (ASL) is reduced as Bowen ratio ( ) increases over land. However, underlying physical mechanisms remain not well understood. With large‐eddy simulations, dissimilarity is investigated in the steady‐state, convective boundary layer (CBL) over homogeneous landscape with varying . As increases from 0.4 to 2.0, the entrainment ratio for slightly decreases but that for q largely increases. As a result, local production of humidity variance is substantially enhanced in the upper CBL and transported to the lower CBL by vigorous large eddies, contributing significantly to nonlocal fraction. However, the increased temperature variance in the ASL associated with strong heat flux is larger than that transported from the upper CBL. Such asymmetry in vertical diffusion induced by varying partitioning of surface fluxes strongly regulatesdissimilarity even under perfect conditions valid for Monin‐Obukhov similarity theory.