Tuesday, 6 September 2022

Sprucing Up the Planet?

An alien Sitka spruce on New Zealand's uninhabited Campbell island, has been described as the 'loneliest tree in the world'. This tree may, however, help climate change scientists (https://www.theguardian.com/world/2022/sep/06/scientists-hope-worlds-loneliest-tree-will-help-answer-climate-questions). The nearest neighbour tree to the Spruce, is 222 km away on the Auckland islands. A University study is underway, looking at the carbon in this Spruce's rings, to assess changing annual uptake. 50% of the carbon dioxide, from burning fossil fuels, remains in the atmosphere. The remainder is taken up by carbon sinks in the Oceans and on the land. The Southern Ocean is a carbon sink, that has taken up 10% of all the 'greenhouse gas' emissions produced over the last 150 years (i.e. since the start of the Industrial Age). Carbon sinks may 'fill up' or, perhaps, be able to expand their capacity (the latter is more likely). Data from the 'loneliest tree in the world' could provide a definitive answer. The data may also offer insights on possible ways of increasing carbon dioxide uptake by carbon sinks.

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