Evidence for El Niño-Southern Oscillation (ENSO) influence on Arctic CO interannual variability through biomass burning emissions
Evidence for El Niño-Southern Oscillation (ENSO) influence on Arctic CO interannual variability through biomass burning emissions
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厄尔尼诺-南方涛动（ENSO）通过生物质燃烧排放对北极二氧化碳年际变化影响的证据
DOI：
10.1029/2012gl052512
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发表时间：
2012
影响因子：
5.2
通讯作者：
Monks S
中科院分区：
文献类型：
--
作者：
Monks S
全球化学输送模式与地面站的测量相结合，用于研究生物质燃烧和气象在驱动北极一氧化碳(CO)年际变化(IAV)方面的重要性。年变化火灾排放量的模拟捕获了66%-93%的CO IAV，而年变化气象条件下固定火灾排放的模拟捕获了0-25%的CO IAV，表明生物质燃烧的变化是地表CO IAV的主要驱动因素。观测到的CO异常与厄尔尼诺显著相关(0.58<；r<；0.64，99%置信度(CL))，结果表明这是由于ENSO对火灾排放的影响。阿拉斯加北部、加拿大和西伯利亚东北部被发现对北极火灾CO总量的贡献为59%，对北极火灾CO IAV的贡献为67%。对这些地区气象火灾驱动因素的分析表明，ENSO影响冬季/春季降水，推动北极/ENSO关系。
A global chemical transport model is used in conjunction with measurements from surface stations to study the importance of biomass burning and meteorology in driving Arctic carbon monoxide (CO) interannual variability (IAV). Simulations with yearly varying fire emissions capture 66%–93% of CO IAV and a simulation with yearly varying meteorology but fixed fire emissions captures 0–25%, showing that biomass burning variability is the dominant driver of surface CO IAV. Observed CO anomalies are found to be significantly correlated with El Niño (0.58 < r < 0.64, 99% confidence level (CL)) and results indicate that this is due to ENSO's influence on fire emissions. Boreal Alaska, Canada and north‐east Siberia are found to contribute 59% to total Arctic fire CO and 67% to Arctic fire CO IAV. Analysis of meteorological fire drivers in these regions suggests that ENSO affects winter/spring precipitation, driving the Arctic/ENSO relationship.