A crucial issue in atmospheric studies on greenhouse gas content involves assessing the representativeness (footprint) having influence on their concentrations measured by tall towers. In this study, the Stochastic Time-Inverted Lagrangian Transport (STILT) model was used to estimate seasonal cumulative footprint climatology for greenhouse gases measurements obtained on the 301-meter-high Zotino Tall Tower Observation Facility (ZOTTO) for the growing seasons (May-September) from 2008 to 2012 (with the exception of 2011). Results showed that the ZOTTO seasonal concentration cumulative footprint climatology for four years reached 6.9×106 km2 and the 75% cumulative footprints varied from 1.9 to 2.3×106 km2. For the same period, the Russian Land Cover map based on MODIS data for 2014 was used to estimate the impact of land cover surrounding the ZOTTO tower on concentration measurements. The analysis showed that in the 75% seasonal cumulative footprint the largest area is occupied by bogs, followed (in decreasing order) by larch, mixed, light-coniferous evergreen forests, grassland, and by other classes. Furthermore, analysis of the contributions from individual cells making up a footprint showed that the largest influence on formation of greenhouse gas concentrations as recorded by ZOTTO comes from the types of vegetation growing in the immediate vicinity of the tall tower, namely bogs, mixed forests, and light and dark coniferous forest stands.

中文翻译：

---

下垫面对中西伯利亚大气中温室气体浓度的影响

关于温室气体含量的大气研究的一个关键问题涉及评估对高塔测量的浓度有影响的代表性（足迹）。在这项研究中，随机时间倒转拉格朗日传输 (STILT) 模型用于估计在 301 米高的 Zotino Tall Tower Observation Facility (ZOTTO) 上获得的生长季节（5 月至9 月）从 2008 年到 2012 年（2011 年除外）。结果表明，ZOTTO 4年的季节浓度累积足迹气候学达到6.9×106 km2，75%的累积足迹在1.9～2.3×106 km2之间变化。同期，使用基于 2014 年 MODIS 数据的俄罗斯土地覆盖图来估计 ZOTTO 塔周围的土地覆盖对浓度测量的影响。分析表明，在 75% 的季节性累积足迹中，沼泽占据的面积最大，其次是（按降序）落叶松、混交、轻针叶常绿常绿林、草地和其他类别。此外，对构成足迹的单个细胞的贡献的分析表明，ZOTTO 记录的对温室气体浓度形成的最大影响来自于高塔附近生长的植被类型，即沼泽、混交林、和浅色和深色的针叶林。分析表明，在 75% 的季节性累积足迹中，沼泽占据的面积最大，其次是落叶松、混交、轻针叶常绿常绿林、草地和其他类别（按降序排列）。此外，对构成足迹的单个细胞的贡献的分析表明，ZOTTO 记录的对温室气体浓度形成的最大影响来自于高塔附近生长的植被类型，即沼泽、混交林、和浅色和深色的针叶林。分析表明，在 75% 的季节性累积足迹中，沼泽占据的面积最大，其次是落叶松、混交、轻针叶常绿常绿林、草地和其他类别（按降序排列）。此外，对构成足迹的单个细胞的贡献的分析表明，ZOTTO 记录的对温室气体浓度形成的最大影响来自于高塔附近生长的植被类型，即沼泽、混交林、和浅色和深色的针叶林。