土壤的融化會影響到土壤有機碳的周轉與釋放,，中科院東北地理與農業(yè)生態(tài)研究所濕地與全球變化學科組王憲偉助理研究員等研究分析了中國大興安嶺多年凍土區(qū)泥炭地在泥炭蘚層（0-10cm）-泥炭層（40-50cm）-多年凍土層（80-90cm）融化過程中CO2和CH4的釋放特征。
研究結果表明：在有氧和厭氧的環(huán)境下,，融化都會使土壤中的碳快速釋放,；泥炭蘚層釋放最多的CO2，但泥炭蘚層CH4的釋放量最低,，而泥炭層和多年凍土層都有CH4的大量釋放,，釋放的CH4包括泥炭和多年凍土中封存的CH4和微生物分解釋放的CH4；對比融化前后,，泥炭蘚層（0-10cm）分解的溫度敏感性具有降低的趨勢,，根部層（10-20cm）分解的溫度敏感性變化不大，泥炭層（40-50cm）和多年凍土層（80-90cm）分解的溫度敏感性具有增加的趨勢,。研究指出,，融化過程中碳的排放受到不同環(huán)境下泥炭和多年凍土土壤中可溶性有機碳、微生物量碳以及土壤酶活性等多種因素的影響,。相關研究結果發(fā)表在Atmos Environ (2013,；75：77-82)上,。（生物谷Bioon.com）
生物谷推薦的英文摘要
Atmospheric Environment DOI: 10.1016/j.atmosenv.2013.04.056
Carbon release from Sphagnum peat during thawing in a montane area in China
Wang， Xianwei,； Song,， Changchun； Wang,， Jiaoyue,； Miao， Yuqing,； Mao,， Rong； Song,， Yanyu
Soil thawing may affect the turnover of soil organic carbon (C) and the release of C to the atmosphere. Little is known about C release during thawing in the Great Hing'an Mountains,， China. Through the incubations,， we studied the emissions of CO2 and CH4 during thawing from the Sphagnum moss layer to the permafrost layer under aerobic and anaerobic conditions. Carbon was released quickly during thawing under different conditions. The Sphagnum moss layer produced more CO2 than the other layers. However,， there was little CH4 release during thawing in the Sphagnum moss layer and burst of CH4 emissions in the peat and permafrost soils. These bursts include stored CH4 in the frozen samples and productions from microbial activity. The temperature sensitivity during thawing decreased across the freezing point in the Sphagnum moss layer， did not change greatly in the root layer,， and increased greatly in the peat and permafrost layers. Changes in soil substrates and enzyme activities may affect C release during thawing.
