A new cloche design for elevating temperature in polar terrestrial ecosystems

摘要

A cloche design is described that is suitable for elevating temperature to simulate global warming in polar ecosystems. This cloche system was used in a manipulation experiment near Ny Ålesund, Spitsbergen, Svalbard. An average warming of 2.8 deg. C. was produced over a 60 day growing season, well within the range predicted by present climate models. The elevation effect is shown to be consistent over the diel cycle and throughout the short arctic summer season. Several advantages over previous designs of manipulation unit are highlighted