摘要
A ca. 4000a decadal-resolution climate proxy record of the mean grain-size from a lake (or mash) sediment at the southern margin of the Tarim Basin, correlates visu- ally with the atmospheric △14C, record from tree ring (residual △14C, solar proxy)and the GISP2 ice core 8O record (tem- peralure proxy). In general, △14 C maxima (solar minima) are coincident With cold (wet) periods in the study area and cold periods in the (;reenland ice core. Power spectrum analysis revealed statislically significant periodicities of 196a, 121a, 97a, 62a, 45a and 33—30a, which are similar to those prin- cipal solar-oscillation periods as inferred from the atmos- pheric radiocarbon and other proxy records. Possible solar forcing is addressed to be the main driving forcing of climate change in the southern margin of Tarim Basin.
A ca. 4000a decadal-resolution climate proxy record of the mean grain-size from a lake (or mash) sediment at the southern margin of the Tarim Basin, correlates visually with the atmospheric C-14 record from tree ring (residual Delta(14)C, solar proxy) and the GISP2 ice core delta(18)O record (temperature proxy). In general, Delta(14)C maxima (solar minima) are coincident with cold (wet) periods in the study area and cold periods in the Greenland ice core. Power spectrum analysis revealed statistically significant periodicities of 196a, 121a, 97a, 62a, 45a and 33-30a, which are similar to those principal solar-oscillation periods as inferred from the atmospheric radiocarbon and other proxy records. Possible solar forcing is addressed to be the main driving forcing of climate change in the southern margin of Tarim Basin.
