To understand the spatio-temporal variations of the atmospheric greenhouse gases in the Arctic region, we have conducted systematic observations and numerical model simulations. Long-term observations for CO₂, CH₄ and related constituents at Ny-Ålesund helped in separating the oceanic and terrestrial uptake rates of CO₂ and revealed the importance of biogenic CH₄ emissions to atmospheric CH₄ variations. Shipboard observations of atmospheric CH₄ in the Arctic Ocean indicated several peaks associated with long-range transports of the continental source signals. An underestimation of climatological O₂ flux is demonstrated by the shipboard O₂/N₂ observations over the North Pacific and Arctic Sea. Clear seasonal cycles and long-term trends of the greenhouse gases were observed in the upper troposphere and lower stratosphere over the Eurasian continent at 8.5–12.5 km in altitude. Forward and inverse modeling studies and direct observations of CH₄ emission from West Siberian wetlands were conducted to evaluate the CH₄ fluxes estimated by previous bottom-up studies. To be consistent with the atmospheric CH₄ observations, the prescribed CH₄ emission needs downward and upward revisions at Hudson Bay Lowland and West Siberia, respectively. The terrestrial ecosystem model study showed increasing trends in the CH₄ emission in inland North America, Alaska and northern part of West Siberian Lowland.

为了了解北极地区大气温室气体的时空变化，我们进行了系统的观测和数值模型模拟。在Ny-Ålesund对CO ₂，CH ₄和相关成分进行的长期观察有助于分离海洋和陆地对CO _2的吸收速率，并揭示了生物CH ₄排放对大气CH ₄变化的重要性。船上对北冰洋大气中CH _4的观察表明，有几个与大陆源信号的远距离传输有关的峰。气候的O低估₂通量由船上Ó证明₂/ N ₂对北太平洋和北冰洋的观测。在海拔8.5-12.5 km的欧亚大陆对流层上层和平流层下层，观测到明显的季节周期和温室气体的长期趋势。进行了正向和反向建模研究以及对西西伯利亚湿地CH ₄排放的直接观察，以评估由先前的自下而上研究估算的CH ₄通量。为了与大气中的CH ₄观测值保持一致，规定的CH ₄排放量需要分别在哈德逊湾低地和西西伯利亚进行向下和向上修正。陆地生态系统模型研究表明CH _4的趋势在增加 北美内陆，阿拉斯加和西西伯利亚低地北部的排放。