Decadal changes in the type and extent of Wetlands in Alaska using L-band SAR data — A preliminary analysis

D. Clewley, J. Whitcomb, M. Moghaddam, K. McDonald, P. Bunting
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引用次数: 1

Abstract

Northern peatlands are estimated to hold about 30 % of the total global pool of soil carbon or 13 % of the total terrestrial carbon in the biosphere [1]. The warmer, drier conditions being experienced throughout the Arctic appear to be accelerating both aerobic and anaerobic decomposition of northern peatland soils, thereby increasing emissions of methane (CH4) and carbon dioxide (CO2) [2]. If continued, this trend could cause northern peatlands to become major sources of atmospheric carbon, with existing models predicting large increases in CH4 emissions as CO2 levels continue to rise [3]. To better understand sources, sinks, and net fluxes of atmospheric CO2 and CH4 validated high-resolution maps of the extent and distribution of northern wetlands are needed [4].
基于l波段SAR数据的阿拉斯加湿地类型和范围的年代际变化——初步分析
据估计,北部泥炭地约占全球土壤碳库总量的30%或生物圈陆地碳总量的13%[1]。整个北极地区正在经历的更温暖、更干燥的条件似乎正在加速北部泥炭地土壤的好氧和厌氧分解,从而增加甲烷(CH4)和二氧化碳(CO2)的排放[2]。如果这种趋势继续下去,北方泥炭地可能成为大气碳的主要来源,现有模型预测,随着CO2水平继续上升,CH4排放量将大幅增加[3]。为了更好地了解大气中CO2和CH4的来源、汇和净通量,需要有经过验证的北部湿地范围和分布的高分辨率地图[4]。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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