Large injection of carbon monoxide into the upper troposphere due to intense biomass burning in 1997
Large injection of carbon monoxide into the upper troposphere due to intense biomass burning in 1997
复制标题
1997年，由于生物质的强烈燃烧，大量一氧化碳注入对流层上层
DOI：
10.1029/1999jd900193
复制
发表时间：
1999
影响因子：
--
通讯作者：
Y. Tsutsumi
中科院分区：
文献类型：
--
作者：
H. Matsueda;H. Inoue;M. Ishii;Y. Tsutsumi
摘要1993年4月至1997年12月，利用商业客机定期收集8-13 km的空气样本，以获得澳大利亚和日本之间西太平洋对流层上层一氧化碳（CO）混合比的长期测量值。1997年的测量结果清楚地表明，南半球的CO在9月至11月期间异常增加，10月在20°S附近的峰值为320-380 ppb。热带生物质燃烧是1997年二氧化碳增加的主要来源，而不是城市/工业排放。在前几年观测到类似的由于生物质燃烧导致的南部春季增加。这些峰值表现出与厄尔尼诺/南方涛动（ENSO）事件相关的较大年际变化。最大的CO春季峰值出现在1997年强厄尔尼诺事件期间，而1996年弱拉尼娜年的CO春季峰值基本被抑制。输出长波辐射（OLR）异常在厄尔尼诺事件期间最大，表明厄尔尼诺事件导致热带干旱时间延长，并显著影响热带东南亚生物质燃烧的扩大。因此，enso循环CO变率最可能的原因是主要来自东南亚的生物质燃烧排放的逐年变化。根据燃烧生物质的CO从东南亚向南太平洋西部对流层上层可能的远距离输送，讨论了南副热带南部CO春季峰值的出现。
AbstracL Air samples at 8-13 km were collected regularly using a commercial airliner to obtain long-term measurements of carbon monoxide (CO) mixing ratio in the upper troposphere over the western Pacific between Australia and Japan during April 1993 - December 1997. The measurements in 1997 clearly reveal an anomalous CO increase during September to November in the Southern Hemisphere, with a maximum of 320-380 ppb around 20°S in October. Tropical biomass burning, not urban/industrial emissions, was the main source for the enhanced CO in 1997. A similar southern-spring increase due to biomass burning was observed in previous years. The peaks showed a large interannual variation associated with the El Nino/Southern Oscillation (ENSO) events. The largest CO spring peak appeared during the strong El Nino event in 1997, while the weak La Nina year of 1996 was marked by a largely suppressed CO spring peak. The outgoing longwave radiation (OLR) anomaly is largest during the El Nino events indicating that the events cause a longer drought in the tropics and significantly influence the enlargement of biomass burning in tropical Southeast Asia. Thus the most likely cause for the ENSO-cycle CO variability is a year-to-year change of biomass-burning emissions mainly from Southeast Asia. The appearance of the CO spring peak in the southern subtropics is discussed on the basis of the possible long-range transport of biomass-burning CO from Southeast Asia to the upper troposphere over the western South Pacific.