Dissertation Research: Impacts of Temperature and Precipitation on Peat-Carbon Dynamics in Alaska and Patagonia

论文研究：温度和降水对阿拉斯加和巴塔哥尼亚泥炭碳动力学的影响

• 批准号: 1110665
• 负责人: Zicheng Yu
• 金额: $ 1.46万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2012-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1110665&HistoricalAwards=false
• 关键词: Dissertation; Research; Impacts; Temperature; Precipitation

This doctoral dissertation improvement project will study the relative importance of summer temperature and precipitation in controlling the carbon balance in peatlands in Alaska and southern Patagonia. Past shifts in the earth?s rotational axis have differentially affected temperatures in the northern and southern hemisphere. By examining past rates of carbon sequestration in cores from peatlands in both hemispheres the importance of past climate can be inferred.High latitude regions are experiencing warming at rates faster than elsewhere on earth. Because warming affects both the production and the decay of organic matter in peatlands, it is unclear how warming will affect carbon storage in peatland soils, which account for about one-third of soil carbon globally. Understanding the fate of carbon stored in peatlands is key to assessing the global carbon budget.

本次博士论文改进项目将研究夏季温度和降水在控制阿拉斯加和南巴塔哥尼亚泥炭地碳平衡中的相对重要性。地球过去的变化？S旋转轴对北半球和南半球温度的影响是不同的。通过检查两个半球泥炭地岩心过去的碳固存率，可以推断出过去气候的重要性。高纬度地区正在以比地球上其他地方更快的速度经历变暖。由于气候变暖会影响泥炭地有机质的产生和衰变，目前尚不清楚气候变暖将如何影响泥炭地土壤的碳储量，而泥炭地土壤的碳储量约占全球土壤碳的三分之一。了解泥炭地储存的碳的命运是评估全球碳预算的关键。