Resistances to ozone deposition to a flark fen in the northern aapa mire zone
Resistances to ozone deposition to a flark fen in the northern aapa mire zone
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北部 aapa 泥沼区弗拉克沼泽对臭氧沉积的抵抗力
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
T. Laurila
中科院分区：
文献类型：
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作者：
J. Tuovinen;M. Aurela;T. Laurila
我们提出的结果涡度相关测量臭氧沉积到亚北极阿帕沼泽。1995年8月至9月在芬兰北方进行了测量。这项研究的目的是量化臭氧通量到这个特定的表面类型和解释的观测干沉积的电阻类比模型。臭氧的干沉降速度有一个弱的日周期，在这个周期内的小时平均值在0.15到0.2 cm s−1之间。体表面电阻在白天平均约为400 s m−1，在黑暗中平均约为480 s m−1。昼夜差异很小，表明对辐射的依赖性很弱。子层斯坦顿数对流量的独立性，这是大约有效的渗透性植被的表面，被发现失败的本表面，表现出明显的驼峰空心图案。这增加了将表面电阻确定为电阻系统中的残余的不确定性。两个通用的参数化的表面电阻的观察结果的比较表明，这些往往高估了表面相关的电阻的光敏感性。这些计划的总体绩效在很大程度上取决于土地使用数据和季节定义的实际执行情况。
We present results of eddy covariance measurements of ozone deposition to a subarctic aapa mire. The measurements were performed in northern Finland in August-September 1995. The aim of the study is to quantify the ozone flux to this specific surface type and interpret the observations in terms of the resistance analogy model for dry deposition. The dry deposition velocity of ozone had a weak diurnal cycle, the hourly means within this cycle ranging from 0.15 to 0.2 cm s−1. The bulk surface resistance was on average about 400 s m−1 during the daytime and 480 s m−1 in the dark. The small day-to-night difference indicates only a weak dependence on radiation. The independence of the sublayer Stanton number on flow, which is approximately valid for surfaces of permeable vegetation, was found to fail for the present surface, which exhibits a pronounced hummock-hollow pattern. This adds to the uncertainty in determining the surface resistance as a residual in the resistance system. Comparisons of observations with two general-purpose parameterizations of the surface resistance indicate that these tend to overestimate the light sensitivity of surface-related resistances. The overall performance of these schemes much depends on the actual implementation with respect to land-use data and seasonal definitions.