Air-Sea Exchange of Volatile Organic Compounds: A New Model with Microlayer Effects  

作　　者：HE Cen-Lin FU Tzung-May 

机构地区：[1]College of Urban and Environmental Science, Peking University [2]Department of Atmospheric and Oceanic Sciences & Laboratory for Climate and Ocean-Atmosphere Studies, School of Physics, Peking University

出　　处：《Atmospheric and Oceanic Science Letters》2013年第2期97-102,共6页大气和海洋科学快报（英文版）

基　　金：funded by the National Natural Science Foundation of China (Grant No. 41222035)

摘　　要：The authors propose a new "three-layer" conceptual model for the air-sea exchange of organic gases, which includes a dynamic surface microlayer with photochemical and biological processes. A parameterization of this three-layer model is presented, which was used to calculate the air-sea fluxes of acetone over the Pacific Ocean. The air-sea fluxes of acetone calculated by the three-layer model are in the same direction but possess half the magnitude of the fluxes calculated by the traditional two-layer model in the absence of photochemical and biological processes. However, photochemical and biological processes impacting acetone in the microlayer can greatly vary the calculated fluxes in the three-layer model, even reversing their direction under favorable conditions. Our model may help explain the discrepancies between measured and calculated acetone fluxes in previous studies. More measurements are needed to validate our conceptual model and provide constraints on the model parameters.The authors propose a new ＂three-layer＂ con ceptual model for the air-sea exchange of organic gases, which includes a dynamic surface microlayer with pho tochemical and biological processes. A parameterization of this three-layer model is presented, which was used to calculate the air-sea fluxes of acetone over the Pacific Ocean. The air-sea fluxes of acetone calculated by the three-layer model are in the same direction but possess half the magnitude of the fluxes calculated by the tradi tional two-layer model in the absence of photochemical and biological processes. However, photochemical and biological processes impacting acetone in the microlayer can greatly vary the calculated fluxes in the three-layer model, even reversing their direction under favorable conditions. Our model may help explain the discrepancies between measured and calculated acetone fluxes in pre vious studies. More measurements are needed to validate our conceptual model and provide constraints on the model parameters.

关 键 词：air-sea transfer organic gas two-layer model microlayer surface renewal 

分 类 号：P432[天文地球—大气科学及气象学]