本申请拟发展一种利用地震噪声信号来定量确定地震噪声源位置和强度的新方法，并利用新方法确定格陵兰岛海域附近2012-2014年间地震噪声源的位置和强度的时空变化、探讨其起因以及与区域气候的相关性。此项目将通过模拟地震波在三维介质中的传播，了解微弱地震信号的传播物理机制，结合最新发展的计算地震噪声等效源的理论地震图的计算方法，发展确定微弱地震信号源的位置和强度的新方法。此方法的发展将使一般地震噪声源在空间和强度分布的确定成为可能，而确定格陵兰岛附近噪声源的时空变化将为探讨其起因及其与区域气候变化的关系提供了一个特定的研究手段，为利用地震噪声资料研究海洋动力学和海洋大气耦合机制提供一个可行的方向。

This proposal proposes to establish a method of using microseisms to determine location and magnitude of the microseism sources, and to apply the method to study the temporal and spatial distributions of microseism sources near Greenland and explore the cause of those microseism sources and their relationship to the local climate change. The method will be developed through understanding the wave propagation mechanism of miscroseisms using 3D seismic wave simulations and incorporating the new method of calculating synthetic seismogram for the miscroseism source. The development of the method would make the quantitative determination of microseism sources possible, while the mapping of the miscroseism sources near the Greenland coastal area would provide a unique tool to explore its cause and relationship to the local climate change and offer a practical direction of using miscroseisms to study ocean dynamics and ocean-atmosphere coupling.