Study of roughness lengths and drag coefficients over Nansha Sea region, Gobi, desert, oasis and Tibetan plateau

Near-surface turbulent fluxes observations from three targe-scale surface-a tmosphere interaction field experiments are studied. In the context of the extended Monin-Obukhov similarity theory, investigation was performed of ae rodynamic roughness (z(0)), scalar roughness (z(T), z(Q)), neutral drag coe fficient (C-DN), bulk transfer coefficient (sensible heat exchange coeffici ent C-HN and vapor analog C-EN) from a calm and a rough sea of the Nansha r egion, separately, and of aerodynamic roughness and drag coefficients from Gobi, desert, oasis and the Tibetan plateau, together with the related dist ribution of the wind u. Some meaningful results have been derived. (C) 2000 Elsevier Science Ltd. All rights reserved.