地壳校正在长江中下游地区远震层析成像中的应用

利用布设在长江中下游地区的47个固定台站所接收到的473个远震事件,对该地区进行了地壳校正研究。结果显示：(1)内陆地区下方的地壳呈现为低速异常,而沿海地区下方的地壳却呈现为高速异常;(2)地壳校正前后的速度异常确有变化,但差别不是很大,说明长江中下游地区的地壳结构比较稳定;(3)随着深度的增加,速度异常的差别越来越小,说明地壳校正对浅部的速度结构影响较大,而对深部的影响较小。因此,在远震层析成像研究中,若缺少浅部信息,可以进行地壳校正,以消除或减少地壳结构对最终反演结果的影响,从而提高深部结果的质量。     

北欧海深层水的研究进展简

As a connection region between North Atlantic and Arctic Oceans, the Nordic Sea plays a critical role in global climate system. In the Nordic Seas, surface water converts into intermediate water and deep water after cooling and other effects. These waters transport southward, and enter into North Atlantic as a form of overflow, therefore, they are the main source of the North Atlantic Deep Water(NADW), which play a key role in global ocean conveyor. The causes and processes of the deep water formation in the Nordic Seas are still uncertain. Based on a review of current and historical research results of the deep water in the Nordic Seas, the most important process for deep water formation convection is addressed. Factors and physical processes that may have impact on deep water formation are summarized. The transport of deep water in the Nordic Seas is summed up. Multi year variation of the deep water is described with the aim of giving some instructions and research directions to the readers.     

全球气候变化研究与科学数据简

By illustrating the relationship between the climate system and the scientific data, a requirement of scientific data for the earth system research has been proposed to be paid more attention to climate change studies. The research progresses of global climate change in China for the recent 10 years have been reviewed and the important role of observation datasets and assimilated production in the global climate change has been pointed out. Furthermore, the meteorological data sharing situation