A New Approach to Reconstruct Paleogene Atmospheric Hydrology at High Latitudes

Reconstruction of ancient atmospheric conditions through the analysis of precipitation patterns is a novel endeavor in the study of paleoclimate. A new approach is now available for a quantitative reconstruction of Paleogene atmospheric hydrological conditions in High Arctic. It is based on 1） the discovery of exceptionally-preserved Paleogene plant fossils from the Canadian Arctic which yielded in situ labile biomolecules 2） the development of compound-specific hydrogen isotope analysis which can be applied to small amount of plant material and 3） taxon-specific apparent hydrogen isotope fractionation factors obtained from empirical measurement. A new moisture recycling model is established to explain the reconstructed paleohydrologic pattern in the High Arctic during Paleogene.

通过降水模式的分析的古老的大气的条件的重建是在古气候的学习的一个新奇努力。一条新途径现在为在高北极的 Paleogene 大气的水文学条件的量的重建是可得到的。它基于 1 ) 从在 situ 让步了的加拿大的北极的特别保存的 Paleogene 植物石块的发现易变的 biomolecules；2 ) 能被用于植物材料的小数量的混合物特定的氢同位素分析的发展；并且 3 ) 从实验测量获得的 taxon 特定的明显的氢同位素分别因素。再循环模型的新潮湿被建立在 Paleogene 期间在高北极解释重建的 paleohydrologic 模式。