Publication Date:
2013-08-10
Description:
Numerous volatile organic compounds (VOCs) exist in Earth's atmosphere, most of which originate from biogenic emissions. Despite VOCs' critical role in tropospheric chemistry, studies for evaluating their atmosphere-ecosystem exchange (emission and deposition) have been limited to a few dominant compounds owing to a lack of appropriate measurement techniques. Using a high-mass resolution proton transfer reaction-time of flight-mass spectrometer and an absolute value eddy-covariance method, we directly measured 186 organic ions with net deposition, and 494 that have bidirectional flux. This observation of active atmosphere-ecosystem exchange of the vast majority of detected VOCs poses a challenge to current emission, air quality, and global climate models, which do not account for this extremely large range of compounds. This observation also provides new insight for understanding the atmospheric VOC budget.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, J-H -- Goldstein, A H -- Timkovsky, J -- Fares, S -- Weber, R -- Karlik, J -- Holzinger, R -- New York, N.Y. -- Science. 2013 Aug 9;341(6146):643-7. doi: 10.1126/science.1235053.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Environmental Science, Policy, and Management, University of California at Berkeley, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23929979" target="_blank"〉PubMed〈/a〉
Keywords:
Atmosphere/*chemistry
;
*Ecosystem
;
Mass Spectrometry
;
Ozone/analysis/chemistry
;
Plants/chemistry
;
Volatile Organic Compounds/analysis/*chemistry
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
