Emissions of CH4 and N2O over the United States and Canada based on a receptor-oriented modeling framework and COBRA-NA atmospheric observations

被引：109

作者：

Kort, Eric A. ^{[1
]}

Eluszkiewicz, Janusz ^{[3
]}

Stephens, Britton B. ^{[8
]}

Miller, John B. ^{[7
,9
]}

Gerbig, Christoph ^{[4
]}

Nehrkorn, Thomas ^{[3
]}

Daube, Bruce C. ^{[2
]}

Kaplan, Jed O. ^{[6
]}

Houweling, Sander ^{[5
,10
]}

Wofsy, Steven C. ^{[1
]}

机构：

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA

[3] Atmospher & Environm Res Inc, Lexington, MA 02421 USA

[4] Max Planck Inst Biogeochem, D-07701 Jena, Germany

[5] SRON Netherlands Inst Space Res, NL-3584 CA Utrecht, Netherlands

[6] Swiss Fed Inst Forest Snow & Landscape Res, CH-1015 Lausanne, Switzerland

[7] NOAA, Earth Syst Res Lab, Boulder, CO 80305 USA

[8] Natl Ctr Atmospher Res, Boulder, CO 80305 USA

[9] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA

[10] Inst Marine & Atmospher Res Utrecht, Utrecht, Netherlands

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1029/2008GL034031

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present top-down emission constraints for two non-CO2 greenhouse gases in large areas of the U. S. and southern Canada during early summer. Collocated airborne measurements of methane and nitrous oxide acquired during the COBRA-NA campaign in May-June 2003, analyzed using a receptor-oriented Lagrangian particle dispersion model, provide robust validation of independent bottom-up emission estimates from the EDGAR and GEIA inventories. We find that the EDGAR CH4 emission rates are slightly low by a factor of 1.08 +/- 0.15 (2 sigma), while both EDGAR and GEIA N2O emissions are significantly too low, by factors of 2.62 +/- 0.50 and 3.05 +/- 0.61, respectively, for this region. Potential footprint bias may expand the statistically retrieved uncertainties. Seasonality of agricultural N2O emissions may help explain the discrepancy. Total anthropogenic U.S. and Canadian emissions would be 49 Tg CH4 and 4.3 Tg N2O annually, if these inventory scaling factors applied to all of North America.

引用

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