Interpreting satellite column observations of formaldehyde over tropical South America

被引：22

作者：

Palmer, Paul I. ^{[1
]}

Barkley, Michael P.

Kurosu, Thomas P.

Lewis, Alastair. C.

Saxton, Julie E.

Chance, Kelly

Gatti, Luciana V.

机构：

[1] Univ Edinburgh, Sch Geol Sci, Edinburgh EH9 3JW, Midlothian, Scotland

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England

[4] IPEN CNEN SP, BR-05508 Sao Paulo, Brazil

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2007年 / 365卷 / 1856期

基金：

英国自然环境研究理事会;

关键词：

formaldehyde; volatile organic compound; biogenic emissions; biomass burning; global ozone monitoring experiment;

D O I：

10.1098/rsta.2007.2042

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Space-borne column measurements of formaldehyde (HCHO), a high-yield oxidation product of volatile organic compounds (VOCs), represent important constraints for quantifying net regional fluxes of VOCs. Here, we interpret observed distributions of HCHO columns from the Global Ozone Monitoring Experiment (GOME) over tropical South America during 1997-2001. We present the first comparison of year-long in situ isoprene concentrations and fire-free GOME HCHO columns over a tropical ecosystem. GOME HCHO columns and in situ isoprene concentrations are elevated in the wet and dry seasons, with the highest values in the dry season. Previous analysis of the in situ data highlighted the possible role of drought in determining the elevated concentrations during the dry season, inferring the potential of HCHO columns to provide regional-scale constraints for estimating the role of drought on isoprene emissions. The agreement between the observed annual cycles of GOME HCHO columns and Along-Track Scanning Radiometer firecount data over the Amazon basin (correlations typically greater than 0.75 for a particular year) illustrates the potential of HCHO column to provide quantitative information about biomass burning emissions.

引用

页码：1741 / 1751

页数：11

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