Collaborative Rsch: Species Responses To Changes In Climate Across Arctic Gradients Using The North American ITEX Network (NATEX): Influences On Community and Ecosystem Processe

研究人员将继续为国际冻土带实验（ITEX）提供美国部分。ITEX在整个北极地区进行了一个非常简单的实验，以检查全球变暖对北极冻土带的潜在影响。在冻土带上放置小的开顶有机玻璃锥，可以使气温升高2-4度，这与温室气体排放增加导致大气中二氧化碳增加一倍所预测的大气温度相似。测量球果内外的植物变量，以确定由诱导变暖引起的影响。利用人为加热实验产生的冻土带变化的关系来预测未来发生的全球变暖变化。美国研究部门在Toolik Lake， Atqasuk和Barrow阿拉斯加以及加拿大的一个地点与加拿大研究人员合作开展了一个研究项目。ITEX项目的结果对于可靠地预测北极冻土带对全球变暖的响应非常重要。这些预测对于了解北极在全球碳循环中的作用以及应对全球变化的自然资源可持续性至关重要。

The researchers will continue to provide the US component to the International Tundra EXperiment (ITEX). ITEX uses a very simple experiment throughout the Arctic to examine the potential effects of global warming on Arctic tundra. Small open-topped plexiglass cones are placed on the tundra to cause a 2-4 degree warming similar to that predicted for atmospheric temperatures in response to a doubling of carbon dioxide in the atmosphere from increased emission of greenhouse gases. Botanical variables are measured within and outside the cones to determine effects caused by the induced warming. The relationship of the changes in the tundra produced by the manipulative heating experiment are used to predict future change occurring in response to global warming. The US research component of conducts a research program at Toolik Lake, Atqasuk, and Barrow Alaska and at one site in Canada in conjunction with Canadian researchers. The results of the ITEX Project are very important for reliable forecasts of the response of Arctic tundra to global warming. Those forecasts are critical to understanding the role of the Arctic in the global carbon cycle and the sustainability of natural resources in response to global change.