GSTDTAP  > 气候变化
DOI10.1002/2017GL073859
Long-term (2005-2014) trends in formaldehyde (HCHO) columns across North America as seen by the OMI satellite instrument: Evidence of changing emissions of volatile organic compounds
Zhu, Lei1; Mickley, Loretta J.1; Jacob, Daniel J.1,2; Marais, Eloise A.1,3; Sheng, Jianxiong1; Hu, Lu1,4; Abad, Gonzalo Gonzalez5; Chance, Kelly5
2017-07-16
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2017
卷号44期号:13
文章类型Article
语种英语
国家USA; England
英文摘要

Satellite observations of formaldehyde (HCHO) columns provide top-down information on emissions of highly reactive volatile organic compounds (VOCs). We examine the long-term trends in HCHO columns observed by the Ozone Monitoring Instrument from 2005 to 2014 across North America. Biogenic isoprene is the dominant source of HCHO, and its emission has a large temperature dependence. After correcting for this dependence, we find a general pattern of increases in much of North America but decreases in the southeastern U.S. Over the Houston-Galveston-Brazoria industrial area, HCHO columns decreased by 2.2% a(-1) from 2005 to 2014, consistent with trends in emissions of anthropogenic VOCs. Over the Cold Lake Oil Sands in the southern Alberta in Canada, HCHO columns increased by 3.8% a(-1), consistent with the increase in crude oil production there. HCHO variability in the northwestern U.S. and Midwest could be related to afforestation and corn silage production. Although NOx levels can affect the HCHO yield from isoprene oxidation, we find that decreases in anthropogenic NOx emissions made only a small contribution to the observed HCHO trends.


Plain Language Summary We use satellite observations to diagnose long-term trends in HCHO columns across North America from 2005 to 2014. HCHO generally increased from 2005-2009 to 2010-2014 but decreased in the southeastern U.S. We find significant regional trends in excess of 20% related to decreases in urban anthropogenic VOC emissions (Houston metropolitan area) and increases in oil/gas production (oil sands in western Canada). Significant regional trends in the northwestern U.S. and in the Midwest may be driven by afforestation and agricultural activity. The impact of declining NOx emission over the U.S. on HCHO columns is likely small over this time frame.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000406257400071
WOS关键词OZONE MONITORING INSTRUMENT ; ISOPRENE EMISSIONS ; AIR CONCENTRATIONS ; SPACE ; OIL ; POLLUTION ; AEROSOLS ; GASES ; MODEL ; GOME
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/29007
专题气候变化
作者单位1.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA;
2.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA;
3.Univ Birmingham, Sch Geog Earth & Environm Sci, Edgbaston, England;
4.Univ Montana, Dept Chem & Biochem, Missoula, MT 59812 USA;
5.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
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GB/T 7714
Zhu, Lei,Mickley, Loretta J.,Jacob, Daniel J.,et al. Long-term (2005-2014) trends in formaldehyde (HCHO) columns across North America as seen by the OMI satellite instrument: Evidence of changing emissions of volatile organic compounds[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13).
APA Zhu, Lei.,Mickley, Loretta J..,Jacob, Daniel J..,Marais, Eloise A..,Sheng, Jianxiong.,...&Chance, Kelly.(2017).Long-term (2005-2014) trends in formaldehyde (HCHO) columns across North America as seen by the OMI satellite instrument: Evidence of changing emissions of volatile organic compounds.GEOPHYSICAL RESEARCH LETTERS,44(13).
MLA Zhu, Lei,et al."Long-term (2005-2014) trends in formaldehyde (HCHO) columns across North America as seen by the OMI satellite instrument: Evidence of changing emissions of volatile organic compounds".GEOPHYSICAL RESEARCH LETTERS 44.13(2017).
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