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Methane emission from Western Siberia's wetland ecosystems in the first half of the XXI century

机译:西斯伯里亚西西伯利亚湿地生态系统的甲烷排放在XXI世纪的上半年

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Interannual variability of methane (CH_4) emission from wetland ecosystems of Western Siberia in 2000-2050 has been investigated. Calculations of CH_4 emission were performed using an approach, in which the total daily methane flux was determined by degree days of the soil and its moisture content as well as available supply of organic substance. Required characteristics of the soil were obtained using the Community Land Model (CLM4.5), coupled with the Regional Climate Model (RegCM4). The model was driven by the data of NCEP-DOE Atmospheric Model Intercomparison Project reanalysis (NCEP-DOE AMIP-II (R2)) and Hadley Global Environment Model 2 - Earth System (HadGEM2ES) within the Representative Concentration Pathway 4.5 (RCP 4.5) and RCP 8.5 radiative forcing scenarios as initial and lateral boundary conditions. It was found that the average value of the emission in 2000-2013 is 4.34 Tg/yr. Expected increase of methane emission in 2041-2050 relative to the 2001-2010 period is 0.58 Tg/yr with 0.18±0.06 Tg/10 yrs trend for the RCP 8.5 scenario. For the scenario RCP 4.5, increase of methane emission is negligible.
机译:研究了2000-2050年西西伯利亚湿地生态系统的赤渣(CH_4)排放的依赖性变异。使用一种方法进行CH_4发射的计算,其中总日甲烷通量由土壤的度数及其水分含量确定,以及有机物质的可用供应。使用社区土地模型(CLM4.5)获得土壤所需的特性,与区域气候模型(REGCM4)相结合。该模型由NCEP-DOE大气模型互通项目再分析的数据(NCEP-DOE AMIP-II(R2))和哈德利全球环境模型2 - 地球系统(HADGEM2ES)在代表性浓度途径4.5(RCP 4.5)和RCP 8.5辐射强制方案作为初始边界条件。发现2000 - 2013年发射的平均值为4.34 Tg / Yr。 2041 - 2050年相对于2001-2010的预期增加甲烷排放量为0.58 Tg / Yr,RCP 8.5场景为0.18±0.06 TG / 10年趋势。对于场景RCP 4.5,甲烷排放的增加可忽略不计。

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