Oceanic microseisms are ambient noise in the observations of gravimeter and seismograph, which are now subjected to pioneering and interdisciplinary research in marine physics, seismology, gravity and meteorology as the variation of their amplitudes, frequencies and polarization can reveal some characteristics of sea roughness and global climate change. In this proposal, we are to carry out an in-depth study of microseisme observations in Chinese Mainland and its neighbourhood. After analysis of the long-term recordings, we obtain the spatio-temporal and spatio-frequency distributions of microseism intensity and polarization directions. With spatiotemporal change of microseimise, meteorological observations in China and global climate change indices, we plan to create a climate-microseism database, so as to studying how to monitor global climate change effects on the weather change in China with help of microseismic observations, and then use datamine to explore the possibility of utlizing microseims observations as an essential element for predicting extreme climate events in mainland China. We will also pay attention to strong abnormal microseisms with much higher amplitude than that of seismic ambient noise in part of Western China, the farthest land away from coasts on Earth. In order to study the cause of the abnormal microseisms, we are to analyze their wave composition and polarization and to locate their excitation sources, and then analyze meteorological and GPS observations around the sources during strong abnormal microseismic times. The result will help us to understand which is the main cause of the the abnormal microseismsn, meteorological change or the Earth's interior dynamic activity, and thus point future researchers in the right direction for further study of excitation mechanism of strong abnormal microseisms in Western China. Earth's hum is Earth's free osciallation which observed on the days without significant earthquakes. That the mechanism relates Earth's hum to atmospheric turbulence or to oceanic infragravity has been an issue concerned by current research in geophysics. As typhoon only excits strong turbulent motion in the atmosphere when it arrives at land, we will compare the the microseisms excited by landfall typhoons and non-landfall typhoons at the coast of China, which may provide a clue to understanding the mechanism of excitation of Earth's hum.