globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50552
论文题名:
Top-down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns
作者: Barkley M.P.; Smedt I.D.; Van Roozendael M.; Kurosu T.P.; Chance K.; Arneth A.; Hagberg D.; Guenther A.; Paulot F.; Marais E.; Mao J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:12
起始页码: 6849
结束页码: 6868
语种: 英语
英文关键词: Amazon ; formaldehyde ; GEOS-Chem ; isoprene ; OMI ; SCIAMACHY
Scopus关键词: Atmospheric chemistry ; Flexible couplings ; Formaldehyde ; Spectrometers ; Amazon ; Chemistry transport model ; GEOS-Chem ; Model configuration ; OMI ; Ozone monitoring instruments ; Scanning imaging absorption spectrometer for atmospheric chartography ; SCIAMACHY ; Isoprene ; air mass ; atmospheric chemistry ; biogenic emission ; biomass burning ; EOS ; formaldehyde ; isoprene ; monitoring ; ozone ; sampling ; satellite data ; SCIAMACHY ; tropical region ; uncertainty analysis ; Amazonia
英文摘要: We use formaldehyde (HCHO) vertical column measurements from the Scanning Imaging Absorption spectrometer for Atmospheric Chartography (SCIAMACHY) and Ozone Monitoring Instrument (OMI), and a nested-grid version of the GEOS-Chem chemistry transport model, to infer an ensemble of top-down isoprene emission estimates from tropical South America during 2006, using different model configurations and assumptions in the HCHO air-mass factor (AMF) calculation. Scenes affected by biomass burning are removed on a daily basis using fire count observations, and we use the local model sensitivity to identify locations where the impact of spatial smearing is small, though this comprises spatial coverage over the region. We find that the use of the HCHO column data more tightly constrains the ensemble isoprene emission range from 27-61 Tg C to 31-38 Tg C for SCIAMACHY, and 45-104 Tg C to 28-38 Tg C for OMI. Median uncertainties of the top-down emissions are about 60-260% for SCIAMACHY, and 10-90% for OMI. We find that the inferred emissions are most sensitive to uncertainties in cloud fraction and cloud top pressure (differences of ±10%), the a priori isoprene emissions (±20%), and the HCHO vertical column retrieval (±30%). Construction of continuous top-down emission maps generally improves GEOS-Chem's simulation of HCHO columns over the region, with respect to both the SCIAMACHY and OMI data. However, if local time top-down emissions are scaled to monthly mean values, the annual emission inferred from SCIAMACHY are nearly twice those from OMI. This difference cannot be explained by the different sampling of the sensors or uncertainties in the AMF calculation. Key Points Satellite HCHO data constrain range of uncertainty in Amazon isoprene emissions Top-down emissions are sensitive to prior isoprene inventory and HCHO retrieval Top-down emissions from SCIAMACHY are about twice those derived from OMI © 2013. American Geophysical Union. All Rights Reserved.
资助项目: NE/GE013810/2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63637
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: EOS Group, Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, United Kingdom; Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium; Harvard-Smithsonian Center for Astrophysics Massachusetts, Cambridge, United States; Jet Propulsion Laboratory, Pasadena, CA, United States; Department of Physical Geography and Ecosystems Analysis, Geobiosphere Science Center, Lund University, Lund, Sweden; Atmospheric Environmental Research, Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; National Center of Atmospheric Research Colorado, Boulder, CO, United States; Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, NJ, United States

Recommended Citation:
Barkley M.P.,Smedt I.D.,Van Roozendael M.,et al. Top-down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)
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