Parameterization of vertical tracer transport due to deep cumulus convection in a global transport model and its evaluation with 222Radon measurements
Parameterization of vertical tracer transport due to deep cumulus convection in a global transport model and its evaluation with 222Radon measurements
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DOI：
10.3402/tellusb.v42i1.15195
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发表时间：
1990-02
期刊：
影响因子：
--
通讯作者：
J. Feichter;P. Crutzen
中科院分区：
文献类型：
--
作者：
J. Feichter;P. Crutzen
本文介绍了一种计算降水对流单体中物质向上输送的参数化方案。该方案主要基于Austin和Houze的工作，在全球三维对流层化学模式中实现。对流事件在时间和空间上都是随机分布的。云的垂直质量交换是由给定对流降水量和平均大尺度温度和湿度分布的水守恒导出的。通过改变模型中的几个关键参数来测试该方案的灵敏度。随后的垂直运输质量和其他方法相比。进一步的测试是用222 Rn进行的，这是一种短寿命的放射性同位素，主要从陆地表面释放。模拟的分布与测量结果吻合较好。对流过程中的短寿命示踪剂的运输的重要性清楚地表明。DOI：10.1034/j.1600-0889.1990.00011.x
A parameterization scheme is described for calculating upward transport of mass in precipitating convective cells. This scheme, which is largely based on the work of Austin and Houze is implemented in a global three-dimensional tropospheric chemistry model. The convective events are stochastically distributed in time and space. The vertical exchange of mass by the clouds is derived from the conservation of water given the convective amount of precipitation and average large-scale temperature and humidity distribution. The sensitivity of the scheme is tested by varying several key parameters in the model. The ensuing vertical transport of mass is presented and compared to other approaches. A further test was made with 222 Rn, a short-lived radioisotope which is largely released from land surfaces. The simulated distribution is in good agreement with measurements. The importance of convective processes for the transport of short-lived tracers is clearly demonstrated. DOI: 10.1034/j.1600-0889.1990.00011.x