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

早白垩纪（valangian - Hauterivian）的气候演化目前有两种不同的解释。一个总体上温暖均衡的温室世界的观点受到了一个相当不同的图景的质疑，寒流甚至可能导致极地冰盖。这些矛盾可能部分是由于缺乏来自高纬度地区的资料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地区（格陵兰东北部）的多代理方法，以更好地了解早白垩纪的古气候和古海洋演化。在详细的生物地层方案（菊石）的基础上，我们将a)了解钙质纳米化石的古生态学和生物地理学，b)研究菊石和角闪石的生物地理学，c)评价角闪石的稳定同位素记录，d)建立锶同位素曲线，e)解释瓦兰尼期-豪特里维期的古气候和古海洋。

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.