RUI: Documenting the Effects of Global Warming on an Arctic Eocene Lake Using Siliceous Microfossil Remains

RUI：利用硅质微化石遗迹记录全球变暖对北极始新世湖泊的影响

基本信息

批准号：
0716606
负责人：
Peter Siver
金额：
$ 30万
依托单位：
Connecticut College
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2007
资助国家：
美国
起止时间：
2007-09-01 至 2012-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0716606&HistoricalAwards=false
关键词：
RUI Documenting Effects Global Warming

项目摘要

Over 50 million years ago, long before humans evolved, the Earth was engulfed in an extremely warm period known as the Cenozoic hot house. The warming event was caused by a massive release of greenhouse gases from deep oceanic sediments and resulted in an Earth that was totally ice-free with subtropical conditions extending well beyond the Arctic Circle. The goal of this project is to document the remains of microscopic photosynthetic organisms from an extensive core representing an ancient Arctic lake during the Cenozoic hot house and use the findings to evaluate the effects of future warming on freshwater ecosystems. The core is remarkable and unique in that it contains a continuous record of events over an eight million year period. In addition to addressing global warming issues, this study will evaluate evolutionary questions for two ecologically important groups of organisms, including evolutionary stasis, formation of modern cell structures and rates of extinction. From an environmental point of view, there is no greater sense of urgency worldwide than understanding the potential effects of global warming on our planet. Today, humans are pumping greenhouse gases into the atmosphere at a rate greater than that which caused the Cenozoic hot house. The project offers a unique opportunity to understand how Arctic freshwater ecosystems respond to global warming and will yield information that can aid in the calibration of computer-based models.

超过5000万年前，在人类进化之前，地球在一个非常温暖的时期被称为Cenozoic Hot House。变暖事件是由深海沉积物中大量释放温室气体引起的，并导致地球完全没有冰，其亚热带条件远远超出了北极圈。该项目的目的是记录来自代表古老的北极湖的广泛核心的微观光合生物的遗迹，并利用这些发现来评估未来变暖对淡水生态系统的影响。核心是显着的，独特的，因为它包含了八百万年内的事件的连续记录。除了解决全球变暖问题外，这项研究还将评估两个在生态上重要的生物群体的进化问题，包括进化性停滞，现代细胞结构的形成和灭绝速率。从环境的角度来看，全世界没有比了解全球变暖对我们星球的潜在影响更大的紧迫感。如今，人类正在以比导致新生代炎热屋的速度将温室气体泵入大气中。该项目提供了一个独特的机会，可以了解北极淡水生态系统如何应对全球变暖，并将产生有助于校准基于计算机的模型的信息。