RUI: Characterizing Arctic lakes during greenhouse climates through an analysis of siliceous organisms: A glimpse of what the future may hold.

RUI：通过对硅质生物的分析来描述温室气候下的北极湖泊的特征：展望未来。

• 批准号: 1144098
• 负责人: Peter Siver
• 金额: $ 37.98万
• 依托单位: Connecticut College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-02-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1144098&HistoricalAwards=false
• 关键词: RUI; Characterizing; Arctic; lakes; during

Over 40 million years ago, long before anthropogenic greenhouse gas emissions was an issue, the Earth was engulfed in an extremely warm period known as the Cenozoic hot house. The warming correlated with an ice-free Earth, lush forests on land masses near the North Pole, and alligators, giant tortoises and tapirs roaming the high Arctic. Indeed, the warmth experienced during the Cenozoic hot house was strikingly similar to future warming estimates derived from climate models. Thus, the Cenozoic hot house represents an ideal analog for understanding future changes resulting from warmer climates. The goal of this project is to document the remains of microscopic plant and animal organisms from three extensive Arctic lake cores that collectively span the Cenozoic hot house, and use the findings to evaluate the development and resilience of freshwater ecosystems in a warm greenhouse world. Preservation and sheer numbers of microfossils in the three cores are unprecedented and the project will also yield a unique opportunity to address long-standing evolutionary questions for ecologically important freshwater organisms. Global warming, caused by higher concentrations of greenhouse gases, is advancing at an unprecedented rate and is arguably the most pressing environmental issue facing society today. Computer models predict significantly elevated warming in Arctic regions, and all indications are that the warming will cause profound reorganizations of biological communities. However, since there are no Arctic ecosystems currently experiencing such warm conditions, we lack data that could be used to verify the computer models. The project offers a unique chance to understand how Arctic freshwater ecosystems did, and most likely will, respond to warming.

超过4000万年前，早在人为的温室气体排放率是一个问题之前，地球在一个非常温暖的时期被称为Cenozoic Hot House。 温暖与无冰的土，北极附近的陆地上的郁郁葱葱的森林以及鳄鱼，巨大的乌龟和tap在高北极漫游。 实际上，在新生代炎热屋期间所经历的温暖与从气候模型中得出的未来变暖估计非常相似。 因此，新生代的热屋代表了理想的类似物，用于理解由于气候变暖而导致的未来变化。 该项目的目的是记录来自三个广泛的北极湖核心的微观植物和动物生物的遗体，这些北极岩心共同跨越了新生代炎热屋，并利用这些发现来评估温暖温室中淡水生态系统的发展和弹性。 三个核心中的保存和庞大的微化石是前所未有的，该项目还将提供一个独特的机会，以解决对生态上重要的淡水生物的长期进化问题。 全球变暖是由更高浓度的温室气体引起的，它以前所未有的速度前进，可以说是当今社会面临的最紧迫的环境问题。 计算机模型预测，北极地区的变暖显着升高，所有迹象表明，变暖将导致生物群落的深刻重组。 但是，由于目前没有北极生态系统经历这种温暖的条件，因此我们缺乏可用于验证计算机模型的数据。 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的做法，而且很可能会对变暖做出反应。