Science. 1964 Sep 18;145(3638):1293-5. doi: 10.1126/science.145.3638.1293.
Absolute pollen deposition in a Connecticut lake over a 4000-year interval has been estimated from pollen frequencies in a core of late-glacial sediment dated by radiocarbon techniques. The rate of total sediment accumulation as measured after burial was statistically constant at 0.036 centimeter per year, but the rate of deposition of pollen grains onto the sediment increased from 600 to 900 grains 14,000 years ago to 9000 per square centimeter per year 10,000 years ago. A major increase in the deposition of tree pollen occurred about 11,500 years ago, at the beginning of the spruce pollen zone. Presentation of data in conventional (percentage) form masks the magnitude of this change and distorts many of the changes in accumulation rates for individual types of pollen; moreover it magnifies statistical variation in the herb zone where all pollen is scarce.
在康涅狄格州的一个湖泊中，通过放射性碳技术对一个年代较晚的冰川沉积物核心进行定年，估计了 4000 年来的绝对花粉沉积量。在埋藏后测量的总沉积物积累率在统计学上保持恒定，为每年 0.036 厘米，但花粉颗粒沉积到沉积物上的速度从 14000 年前的 600 到 900 粒/平方厘米/年增加到 10000 年前的 9000 粒/平方厘米/年。树木花粉的沉积量在大约 11500 年前，即云杉花粉带开始时，出现了大幅增加。以常规（百分比）形式呈现数据掩盖了这种变化的幅度，并扭曲了个别类型花粉积累率的许多变化；此外，它放大了草本区的统计变化，因为在草本区所有花粉都很稀少。
