Xianwu Xu
Auburn University
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Publication
Featured researches published by Xianwu Xu.
Journal of Geophysical Research | 2012
Scot M. Miller; Eric A. Kort; Adam I. Hirsch; E. J. Dlugokencky; Arlyn E. Andrews; Xianwu Xu; Hanqin Tian; Thomas Nehrkorn; Janusz Eluszkiewicz; Anna M. Michalak; S. C. Wofsy
This paper presents top-down constraints on the magnitude, spatial distribution, and seasonality of nitrous oxide (N{sub 2}O) emissions over the central United States. We analyze data from tall towers in 2004 and 2008 using a high resolution Lagrangian particle dispersion model paired with both geostatistical and Bayesian inversions. Our results indicate peak N{sub 2}O emissions in June with a strong seasonal cycle. The spatial distribution of sources closely mirrors data on fertilizer application with particularly large N{sub 2}O sources over the US Cornbelt. Existing inventories for N{sub 2}O predict emissions that differ substantially from the inverse model results in both seasonal cycle and magnitude. We estimate a total annual N{sub 2}O budget over the central US of 0.9-1.2 TgN/yr and an extrapolated budget for the entire US and Canada of 2.1-2.6 TgN/yr. By this estimate, the US and Canada account for 12-15% of the total global N{sub 2}O source or 32-39% of the global anthropogenic source as reported by the Intergovernmental Panel on Climate Change in 2007.
Biogeosciences | 2010
Hanqin Tian; Xianwu Xu; Mingliang Liu; Wei Ren; Charlie Zhang; Guangsheng Chen; Chaoqun Lu
Biogeosciences | 2010
Xianwu Xu; Hanqin Tian; Charlie Zhang; Mingliang Liu; Wei Ren; Guangsheng Chen; Chaoqun Lu; Lori Bruhwiler
Biogeosciences | 2011
Xianwu Xu; Hanqin Tian; Guangsheng Chen; Mingliang Liu; Wei Ren; Chaoqun Lu; Charlie Zhang
Biogeosciences Discussions | 2013
Hanqin Tian; Guangsheng Chen; Chaoqun Lu; Xianwu Xu; Wei Ren; Kamaljit Banger; Bowen Zhang; Bo Tao; Suwen Pan; Mingliang Liu; Charlie Zhang
Biogeosciences Discussions | 2011
Bo Tao; Hanqin Tian; Guangsheng Chen; Wei Ren; Chaoqun Lu; Kelly D. Alley; Xianwu Xu; Mingliang Liu; Shufen Pan; H. Virji
Journal of Geophysical Research | 2012
Scot M. Miller; Eric A. Kort; Adam I. Hirsch; E. J. Dlugokencky; Arlyn Elizabeth Andrews; Xianwu Xu; Hanqin Tian; Thomas Nehrkorn; Janusz Eluszkiewicz; Anna M. Michalak; S. C. Wofsy
Archive | 2010
Chaoqun Lu; Hong-Li Tian; Xianwu Xu; Min Liu; Wei Ren
Archive | 2008
Chen Gao; Hong-Li Tian; Min Liu; Chaoqun Lu; Wei Ren; Charlie Zhang; Xianwu Xu; Song Xue
Archive | 2008
Hong-Li Tian; Jerry M. Melillo; Steven W. Running; J. P. Liu; Min Liu; David W. Kicklighter; Mu Qiao; Wei Ren; Chaoqun Lu; Chen Gao; Xianwu Xu; Charlie Zhang; Suwen Pan; M. G. Zhao; Ranga B. Myneni; Song Xue