冰芯记录揭示末次冰期粉尘增强氯化学与甲烷汇的关联

over the past 30,000 years before the present. nssCa (data points in orange and 10- point moving average in brown) and ExCl− (data point in gray and 10- point moving average in black) concentrations from Greenland (A) [GISP2 ice core (69)] and Antarctic (B) [WAIS ice core (70)] ice cores spanning the past 30 thousand years before the present (kyr B.P.). Both nssCa and ExCl− concentrations exhibit a substantial decrease from ~30 to 18 kyr B.P. Given that this ExCl− is unrelated to marine input, its covariation with nssCa indicates additional chlorine sources directly linked to dust. of the source region) (20, 52, 53). …