The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite

Abstract To understand the relative importance of biogenic emission, biomass burning emission on volatile organic compounds in Amazon, the spatial and temporal correlations between atmospheric column‐integrated formaldehyde (HCHO) and fire count, vegetation hydrological states index, surface solar r...

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Autores principales:	Yuxiang Zhang, Rui Li, Qilong Min, Haixu Bo, Yuyun Fu, Yipu Wang, Zongting Gao
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2019
Materias:	Astronomy QB1-991 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/24ebaf6238004d60be1559060f930116
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spelling	oai:doaj.org-article:24ebaf6238004d60be1559060f9301162021-11-30T22:55:32ZThe Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite2333-508410.1029/2019EA000627https://doaj.org/article/24ebaf6238004d60be1559060f9301162019-06-01T00:00:00Zhttps://doi.org/10.1029/2019EA000627https://doaj.org/toc/2333-5084Abstract To understand the relative importance of biogenic emission, biomass burning emission on volatile organic compounds in Amazon, the spatial and temporal correlations between atmospheric column‐integrated formaldehyde (HCHO) and fire count, vegetation hydrological states index, surface solar radiation flux, near‐surface air temperature are studied using synergized satellite products and reanalysis data. A recently developed microwave‐based vegetation index (emissivity difference vegetation index, EDVI) with high temporal resolution is used for the linkages between vegetation and HCHO at daily scale with and without fire contaminations. At large regional scale, EDVI shows highest spatial correlation with HCHO indicating the important controlling effect of biogenic emission. In given subregions with frequent fires, the temporal variations of monthly HCHO show much stronger correlations with fire count. The temporal correlations between monthly HCHO and EDVI are vague and even negative in some subregions. Radiation and temperature show stable positive temporal correlations with HCHO, particularly in areas with few fires. After excluding the samples contaminated by fires, the daily temporal correlation between vegetation (EDVI) and HCHO becomes significant and positive in most areas except the northern rainforest with weak temporal variations of EDVI. We proposed a bilinear model of biogenic‐emission‐induced HCHO (B‐HCHO) using radiation and EDVI as inputs. The bias between modeled long‐term mean B‐HCHO and satellite observation is less than 20%. And the daily time series of modeled B‐HCHO matches observations as well. It is the first time to provide satellite observational evidences of the relative importance of biogenic emission and biomass burning emission on HCHO, the proxy of atmospheric volatile organic compounds concentration.Yuxiang ZhangRui LiQilong MinHaixu BoYuyun FuYipu WangZongting GaoAmerican Geophysical Union (AGU)articleAstronomyQB1-991GeologyQE1-996.5ENEarth and Space Science, Vol 6, Iss 6, Pp 959-971 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astronomy QB1-991 Geology QE1-996.5
spellingShingle	Astronomy QB1-991 Geology QE1-996.5 Yuxiang Zhang Rui Li Qilong Min Haixu Bo Yuyun Fu Yipu Wang Zongting Gao The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite
description	Abstract To understand the relative importance of biogenic emission, biomass burning emission on volatile organic compounds in Amazon, the spatial and temporal correlations between atmospheric column‐integrated formaldehyde (HCHO) and fire count, vegetation hydrological states index, surface solar radiation flux, near‐surface air temperature are studied using synergized satellite products and reanalysis data. A recently developed microwave‐based vegetation index (emissivity difference vegetation index, EDVI) with high temporal resolution is used for the linkages between vegetation and HCHO at daily scale with and without fire contaminations. At large regional scale, EDVI shows highest spatial correlation with HCHO indicating the important controlling effect of biogenic emission. In given subregions with frequent fires, the temporal variations of monthly HCHO show much stronger correlations with fire count. The temporal correlations between monthly HCHO and EDVI are vague and even negative in some subregions. Radiation and temperature show stable positive temporal correlations with HCHO, particularly in areas with few fires. After excluding the samples contaminated by fires, the daily temporal correlation between vegetation (EDVI) and HCHO becomes significant and positive in most areas except the northern rainforest with weak temporal variations of EDVI. We proposed a bilinear model of biogenic‐emission‐induced HCHO (B‐HCHO) using radiation and EDVI as inputs. The bias between modeled long‐term mean B‐HCHO and satellite observation is less than 20%. And the daily time series of modeled B‐HCHO matches observations as well. It is the first time to provide satellite observational evidences of the relative importance of biogenic emission and biomass burning emission on HCHO, the proxy of atmospheric volatile organic compounds concentration.
format	article
author	Yuxiang Zhang Rui Li Qilong Min Haixu Bo Yuyun Fu Yipu Wang Zongting Gao
author_facet	Yuxiang Zhang Rui Li Qilong Min Haixu Bo Yuyun Fu Yipu Wang Zongting Gao
author_sort	Yuxiang Zhang
title	The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite
title_short	The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite
title_full	The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite
title_fullStr	The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite
title_full_unstemmed	The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite
title_sort	controlling factors of atmospheric formaldehyde (hcho) in amazon as seen from satellite
publisher	American Geophysical Union (AGU)
publishDate	2019
url	https://doaj.org/article/24ebaf6238004d60be1559060f930116
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The Controlling Factors of Atmospheric Formaldehyde (HCHO) in Amazon as Seen From Satellite

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