Emission location dependent ozone depletion potentials for very short-lived halogenated species
Emission location dependent ozone depletion potentials for very short-lived halogenated species
复制标题
寿命极短的卤化物的臭氧消耗潜势取决于排放地点
DOI：
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
K. Law
中科院分区：
文献类型：
--
作者：
I. Pisso;P. Haynes;K. Law
抽象。我们目前的臭氧消耗潜能值（ODP）的非常短的寿命卤化源气体作为一个功能的表面排放位置的估算。耗氧潜能值取决于到达平流层的源气体及其降解产物的比例，这主要取决于对流层的迁移和化学性质，以及由此产生的活性卤素在平流层中的影响，这取决于平流层的迁移和化学性质，特别是取决于平流层的停留时间。这些估计数反映了对流层和平流层中不同的时间尺度和物理化学过程，是根据对流层和平流层的单独轨迹集合计算的。描述了一种方法，通过该方法可以将来自两个集合的信息结合起来，以给出ODP。ODP估计的物种与一个固定的20天的寿命，代表一种化合物，如正丙基溴，作为一个例子。估算的耗氧潜能值显示出强烈的地理和季节变化，特别是在热带地区。ODP的值是敏感的轨迹计算中的对流参数化，但相对的空间和季节变化是不。结果表明，在北方半球夏季，南亚和东南亚的排放量最大，在北方半球冬季，西太平洋的排放量最大。据估计，整个热带地区的排放量也有很大的耗氧潜能值，其不可忽略的数值也延伸到北方中纬度地区，特别是在夏季。这些初步估计，虽然在一些简化的假设下，显示更大的耗氧潜能值为某些排放区域，特别是南亚在北半球夏季，比以往的研究，使用均匀分布在陆地表面的排放量通常报告。
Abstract. We present trajectory-based estimates of Ozone Depletion Potentials (ODPs) for very short-lived halogenated source gases as a function of surface emission location. The ODPs are determined by the fraction of source gas and its degradation products which reach the stratosphere, depending primarily on tropospheric transport and chemistry, and the effect of the resulting reactive halogen in the stratosphere, which is determined by stratospheric transport and chemistry, in particular by stratospheric residence time. Reflecting the different timescales and physico-chemical processes in the troposphere and stratosphere, the estimates are based on calculation of separate ensembles of trajectories for the troposphere and stratosphere. A methodology is described by which information from the two ensembles can be combined to give the ODPs. The ODP estimates for a species with a fixed 20 d lifetime, representing a compound like n-propyl bromide, are presented as an example. The estimated ODPs show strong geographical and seasonal variation, particularly within the tropics. The values of the ODPs are sensitive to the inclusion of a convective parametrization in the trajectory calculations, but the relative spatial and seasonal variation is not. The results imply that ODPs are largest for emissions from south and south-east Asia during Northern Hemisphere summer and from the western Pacific during Northern Hemisphere winter. Large ODPs are also estimated for emissions throughout the tropics with non-negligible values also extending into northern mid-latitudes, particularly in the summer. These first estimates, whilst made under some simplifying assumptions, show larger ODPs for certain emission regions, particularly south Asia in NH summer, than have typically been reported by previous studies which used emissions distributed evenly over land surfaces.
影响因子：
5.2
作者：
R. James;M. Bonazzola;B. Legras;K. Surbled;S. Fueglistaler
通讯作者：
R. James;M. Bonazzola;B. Legras;K. Surbled;S. Fueglistaler
影响因子：
6.3
作者：
R. Hossaini;M. Chipperfield;B. Monge-Sanz;N. Richards;E. Atlas;D. Blake
通讯作者：
R. Hossaini;M. Chipperfield;B. Monge-Sanz;N. Richards;E. Atlas;D. Blake
影响因子：
--
作者：
G. Berthet;J. G. Esler;P. Haynes
通讯作者：
G. Berthet;J. G. Esler;P. Haynes