Title Source attribution and interannual variability of Arctic pollution in spring constrained by aircraft (ARCTAS, ARCPAC) and satellite (AIRS) observations of carbon monoxide
Author Fisher, J.A.; Jacob, D.J.; Purdy, M.T.; Kopacz, M.; Le Sager, P.; Carouge, C.; Holmes, C.D.; Yantosca, R.M.; Batchelor, R.L.; Strong, K.; Diskin, G.S.; Fuelberg, H.E.; Holloway, J.S.; Hyer, E.J.; McMillan, W.W.; Warner, J.; Streets, D.G.; Zhang, Q.; Wang, Y.; Wu, S.
Author Affil Fisher, J.A., Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA. Other: University of Toronto, Canada; NASA, Langley Research Center; Florida State University; University of Colorado; Naval Research Laboratory; University of Maryland; Argonne National Laboratory; Tsinghua University, China; Michigan Technological University
Source Atmospheric Chemistry and Physics, 10(3), p.977-996, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1680- 7316
Publication Date 2010
Notes In English. Part of special issue no. 182, POLARCAT (Polar Study using Aircraft, Remote Sensing, Surface Measurements and Models, of Climate, Chemistry, Aerosols, and Transport), edited by Stohl, A., et al., http://www.atmos-chem- phys.net/special_issue182.html; published in Atmospheric Chemistry and Physics Discussions: 14 September 2009, http://www.atmos-chem-phys- discuss.net/9/19035/2009/acpd-9-19035-2009.ht ml; accessed in May, 2011. 80 refs. GeoRef Acc. No: 310104
Index Terms aerosols; aircraft; biomass; boundary layer; clouds (meteorology); global change; global warming; human activity; hydrocarbons; ozone; pollution; remote sensing; solar radiation; statistical analysis; Arctic region; air pollution; aliphatic hydrocarbons; alkanes; annual variations; atmospheric transport; black carbon; carbon monoxide; climate forcing; clouds; combustion; El Nino; La Nina; least-squares analysis; methane; nonpoint sources; organic compounds; plumes; pollutants; satellite methods; solar forcing; transport; troposphere
Abstract We use aircraft observations of carbon monoxide (CO) from the NASA ARCTAS and NOAA ARCPAC campaigns in April 2008 together with multiyear (2003-2008) CO satellite data from the AIRS instrument and a global chemical transport model (GEOS-Chem) to better understand the sources, transport, and interannual variability of pollution in the Arctic in spring. Model simulation of the aircraft data gives best estimates of CO emissions in April 2008 of 26 Tg month-1 for Asian anthropogenic, 9.4 for European anthropogenic, 4.1 for North American anthropogenic, 15 for Russian biomass burning (anomalously large that year), and 23 for Southeast Asian biomass burning. We find that Asian anthropogenic emissions are the dominant source of Arctic CO pollution everywhere except in surface air where European anthropogenic emissions are of similar importance. Russian biomass burning makes little contribution to mean CO (reflecting the long CO lifetime) but makes a large contribution to CO variability in the form of combustion plumes. Analysis of two pollution events sampled by the aircraft demonstrates that AIRS can successfully observe pollution transport to the Arctic in the mid-troposphere. The 2003-2008 record of CO from AIRS shows that interannual variability averaged over the Arctic cap is very small. AIRS CO columns over Alaska are highly correlated with the Ocean Nino Index, suggesting a link between El Nino and Asian pollution transport to the Arctic. AIRS shows lower-than-average CO columns over Alaska during April 2008, despite the Russian fires, due to a weakened Aleutian Low hindering transport from Asia and associated with the moderate 2007-2008 La Nina. This suggests that Asian pollution influence over the Arctic may be particularly large under strong El Nino conditions.
URL http://www.atmos-chem-phys.net/10/977/2010/acp-10-977-2010.pdf
Publication Type journal article
Record ID 65006749