12345组内消息 2019-12-31
Influences of different definitions of the winter NAO index on NAO action centers and its relationship with SST
对于冬季NAO指数的定义有很多，但尚不清楚这些不同的定义尤其是定义冬季NAO指数时所用的冬季时间定义不同是否会对NAO的研究带来影响。我们主要运用相关性和功率谱分析研究了基于不同定义方法和不同数据来源得到的冬季NAO指数的特征差异，分析了这种差异可能对研究NAO与北大西洋海表温度（SST）关系的影响。结果显示：不同的数据来源对NAO的定义影响不大，不同的定义方法有一定的影响；不同冬季时间定义得到的NAO对NAO活动中心位置和变化规律的描述不同；不同定义方法得到的NAO与SST的关系比较一致，但冬季定义持续时间越长，NAO与海温的关系越显著。
组内消息 2019-12-10
Influences of the NAO on the North Atlantic CO2 Fluxes in Winter and Summer on the Interannual Scale
Highlights
• There is a large difference in the fCO2-NAO relationship between winter and summer in the subtropical region.
• On the interannual scale, the fCO2 variation is dominated by NAO-driven wind speed anomalies in winter, but by surface-ocean pCO2sea in summer.
• The pCO2sea variation is dominated by NAO-driven SSTs in the subtropical region and by other factors in the subpolar region.
Jing Yujie, Li Yangchun, Xu Yongfu, Fan Guangzhou. Influences of the NAO on the North Atlantic CO2 Fluxes in Winter and Summer on the Interannual Scale. Adv. Atmos. Sci. 36, 1288–1298 (2019). https://doi.org/10.1007/s00376-019-8247-2
Full text:https://link.springer.com/article/10.1007/s00376-019-8247-2