A global model tool for three-dimensional multiyear stratospheric chemistry simulations: Model description and first results
A global model tool for three-dimensional multiyear stratospheric chemistry simulations: Model description and first results
复制标题
用于三维多年平流层化学模拟的全球模型工具：模型描述和初步结果
DOI：
10.1029/1999jd900407
复制
发表时间：
1999
影响因子：
--
通讯作者：
F. Stordal
中科院分区：
文献类型：
--
作者：
M. Rummukainen;I. Isaksen;B. Rognerud;F. Stordal
该论文提出了一种新的全球建模工具——平流层化学输运模型 2。它是为有效的三维多年平流层化学研究而开发的，具有广泛的化学方案、硫酸盐气溶胶的异质处理以及一些极地平流层云过程。即使在粗糙的垂直网格中，传输算法也能维持子网格尺度的分布并垂直连接平流层。该模型已经整合了 49 个月，从中层大气环流模型中回收了 1 年的预先计算的运输。国家环境预测中心一年的每日全球分析被用作温度。每 7 天重新计算一次光解速率的昼夜周期，以给出与臭氧变化的相互作用。该模型能够描述大部分地理和季节臭氧变化以及臭氧、活性氮、氯和溴的经向分布。详细捕获了平流层氮、氢、氯和溴物质的昼夜循环。模型中典型的平流层上层臭氧缺乏程度很大。探讨了它对不同调整方式的敏感性。迄今为止，中纬度而非极地的冬季过程一直是该模型工具的重点。目前的传输和网格分辨率不适合高纬度地区的实际模拟。由于仅包含有限的极地平流层云（PSC）微物理，因此也无法很好地模拟寒冷的极地低平流层中的化学过程。例如，未模拟南极臭氧空洞，但模拟的化学反应应适用于不会发生 II 型 PSC 和颗粒沉降的温暖北极冬季。
The paper presents a new global modeling tool, Stratospheric Chemical Transport Model 2. It has been developed for effective three-dimensional multiyear stratospheric chemistry studies, featuring an extensive chemistry scheme, heterogeneous processing on sulfate aerosols, and some polar stratospheric cloud processes. The transport algorithm maintains sub-grid-scale distributions and connects vertically the stratospheric layers, even in a coarse vertical grid. The model has been integrated for 49 months, recycling 1 year of precalculated transport from a middle atmosphere general circulation model. One year of daily National Centers for Environmental Prediction global analyses are used as temperatures. Diurnal cycles of photolysis rates are recalculated every 7 days to give interaction with ozone changes. The model is able to describe most of the geographical and seasonal ozone variability and the meridional distributions of ozone, reactive nitrogen, chlorine, and bromine. Stratospheric diurnal cycles for nitrogen, hydrogen, chlorine, and bromine species are captured in detail. The upper stratosphere ozone deficiency, typical to models, is large. Its sensitivity to different ways of tuning are explored. Midlatitude, rather than polar, wintertime processes have so far been the focus in this model tool. The present transport and grid resolution are not suited for realistic simulations at high latitudes. As there is only a limited inclusion of polar stratospheric cloud (PSC) microphysics, chemical processing in the cold polar lower stratosphere also cannot be well simulated. For example, the Antarctic ozone hole is not simulated, but the modeled chemistry should be suitable for warm Arctic winters when type II PSCs and particle sedimentation do not occur.