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近年来的研究表明湖泊沉积物中埋藏了大量碳,是个不容忽视的碳汇~[1~11],在区域乃至全球碳循环中发挥着重要作用。在未来全球平均温度增加1~2℃的情景下,湖泊沉积物碳埋藏潜力将如何变化值得关注~[1]。了解和重建我国不同区域过去类似增温幅度下(如全新世大暖期,6kaB.P.)的湖泊碳埋藏情况及其时空分布,可作为评估未来气候变化和人类活动对湖泊碳汇潜力影响的重要参考。我国湖泊众多,分布较广,但有关湖泊沉积物碳埋藏的研究却很少~[12~14],对全新世大暖期湖泊沉积物碳埋藏的研究更未见报道。本文基于不同区域42个已发表的兼具6kaB.P.和近现代时期有机碳数据的湖白资料~1),初步估算
In recent years, studies have shown that a large amount of carbon is buried in lake sediments, which is a carbon sink that can not be ignored [1-11] and plays an important role in the regional and even the global carbon cycle. In the future global average temperature increase of 1 ~ 2 ℃ under the circumstances, how the potential of the lake sediment carbon burial change is worth attention [1]. To understand and reconstruct the lake carbon burial and its spatial and temporal distribution in different regions of China in the past with similar warming rates (such as 6kaB.P.) Can be used to assess the impact of future climate change and human activities on the potential of carbon sequestration in lakes Important reference. There are many lakes in our country and their distribution is relatively wide. However, there are few studies on the carbon burial of sediments in the lake [12-14]. The research on the carbon burial of Holocene lacustrine sediments has not been reported yet. Based on 42 published published data from 6kaB.P. and modern organic carbon data in different regions ~ 1), preliminary estimates