The early Cretaceous of Greenland: Climatic and biotic changes in the high latitudes

目前对早白垩世(瓦兰吉尼亚-豪特里亚)的气候演化有两种不同的解释。一幅相当不同的图片质疑了温室世界总体上温暖均衡的观点，寒流甚至可能造成极地冰盖。这些矛盾可能部分是由于缺乏来自高纬度地区的数据和相对较差的生物地层控制造成的。因此，我们提出了一种基于高纬度(格陵兰东北部)的多代理方法，以更好地了解早白垩世的古气候和古海洋演化。基于详细的生物地层学方案(菊石)，我们打算a)了解钙质超微化石的古生态和生物地理，b)研究菊石和角闪石的生物地理，c)评价角闪石的稳定同位素记录，d)建立锶同位素曲线，e)从古气候和古海洋的角度解释瓦兰吉-豪特里亚期。

The climatic evolution of the early Cretaceous (Valanginian - Hauterivian) is currently interpreted in two different ways. The view of a generally warm-equable greenhouse world is questioned by a rather differentiated picture with cold snaps possibly even causing polar ice caps. These contradictions may have partly been caused by a lack of data from the high latitudes and relative poor biostratigraphic control. We therefore propose a multi proxy approach based in the high latitudes (north-east Greenland) to better understand the palaeoclimatic and palaeoceanographic evolution of the early Cretaceous. Based on a detailed biostratigraphic scheme (ammonites) we intend to a) understand the paleoecology and biogeography of calcareous nannofossils, b) study the biogeography of both ammonites and belemnites, c) evaluate the stable isotope record of belemnites, d) develop a Strontium isotope curve, and e) Interpret the Valanginian - Hauterivian interval with respect to its palaeoclimate and palaeoceanography.