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Title: 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
Author(s) / Creator(s):
 ;  ;  
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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  1. Abstract

    Experimental evidence shows that temperature‐humidity () 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. Asincreases from 0.4 to 2.0, the entrainment ratio forslightly decreases but that forqlargely 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.

     
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