Carbonyl sulfide and dimethyl sulfide exchange between trees and the atmosphere

摘要: The exchange rates of carbonyl sulfide (COS) and dimethyl (DMS) between 19 tree species the atmosphere were investigated under natural field conditions using a static enclosure. Most trees acted as sinks for atmospheric COS few trees, such Salix matsudana Koidz. Ulmus pumila L. could emit COS. distinct diurnal variations uptake indicated that strongly depended on photosynthetically active radiation (PAR). average most much higher in summer than autumn, indicating leaf age temperature also might be important influencing factors uptake. Platanus orientalis L., Sophara japonica var. P. loud., Magnolia denudata Desr. Sophora capable continuously absorbing daytime well nighttime. For maximal rate DMS emission single area basis -15.29 0.42 pmol m(-1) s(-1), respectively. fluxes ambient mixing ratios. Significant correlation emissions was observed summer. (c) 2005 Elsevier Ltd. All rights reserved.