Isoprene emissions from Ice Age, present and future tropical trees: fluxes and mechanisms

为了了解地球系统是如何运作的，特别是了解未来地球气候可能如何变化，研究地球的历史以及思考未来是很重要的。影响气候的一个事实是植物与大气之间的相互作用。一些植物产生的化学物质可以改变大气的化学成分，我们认为植物产生的这些化学物质的数量可能会受到大气中二氧化碳含量的影响。我们知道，在上一个冰河世纪，二氧化碳浓度比现在低得多，我们也知道二氧化碳浓度正在迅速上升，所以在这个项目中，我们将在‘上个冰河世纪’的二氧化碳和温度条件下以及在‘双二氧化碳’条件下种植植物，并测试这些化学物质的产量。我们还将研究为什么二氧化碳会对植物产生这种影响，这将有助于我们预测未来随着二氧化碳浓度继续上升可能会发生什么。

In order to understand how the Earth system works, and in particular to understand how the Earth's climate may change in the future, it is important to study the Earth's history, as well as thinking about the future. One fact that influences climate is the interaction between plants and the atmosphere. Some plants produce chemicals that can change the chemical composition of the atmosphere, and we think that the amount of these chemicals produced by plants may be affected by the amount of carbon dioxide in the atmosphere. We know that during the last Ice Age, carbon dioxide concentrations were much lower than at present, and we also know that carbon dioxide concentrations are rapidly rising, so in this project we will grow plants under 'Last Ice Age' conditions of CO2 and temperature and under 'double CO2' conditions and test how much of these chemicals are produced. We will also study why CO2 has this effect on plants, and this will help us predict what might happen in the future as CO2 concentrations continue to rise.