Source-to-Sink process involves the production,transportation and accumulation of terrigenous clastic sediments. Sediments are produced dominantly by weathering and eroding exposed rocks on continent surfaces,with processes mainly regulated by climate and tectonics.Modern regolith studies document that under specific weathering regime(supply-limited weathering), surface soils can be weathered to certain degrees related to temperature and moisture(precipitation vs.evaporation)and their relationships can be outlined by empirical climate transfer functions.Through Source-to-Sink process,the climate signal can be transmitted,along sediment transport,from the source to the sink and is finally preserved in the sedimentary archives. However,climate signals might be damped or shred by landscape erosion and sediment routing systems due to the complexity and autogenic fluctuations of Source-to-Sink process.The climate signal propagation can be selectively filtered,and its fidelity and efficiency are closely related to the frequency and amplitude of climate changes.Studies of deep-time paleoclimate of terrigenous clastic sequences require a thorough understanding of the Source-to-Sink process and the comparison between timescales of sedimentary system responding and potential climate change.