Increased Northern Hemispheric carbon monoxide burden in the troposphere in 2002 and 2003 detected from the ground and from space

[摘要] Carbon monoxide total column amounts in the atmospherehave been measured in the High Northern Hemisphere (30°-90° N,HNH) between January 2002 and December 2003 using infrared spectrometers ofhigh and moderate resolution and the Sun as a light source. They werecompared to ground-level CO mixing ratios and to total column amountsmeasured from space by the Terra/MOPITT instrument. All these data revealincreased CO abundances in 2002-2003 in comparison to the unperturbed2000-2001 period. Maximum anomalies were observed in September 2002 andAugust 2003. Using a simple two-box model, the corresponding annual COemission anomalies (referenced to 2000-2001 period) have been found equal to95Tg in 2002 and 130Tg in 2003, thus close to those for 1996 and 1998. Agood correlation with hot spots detected by a satellite radiometer allowsone to assume strong boreal forest fires, occurred mainly in Russia, as asource of the increased CO burdens.

[学科分类] 大气科学