Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers at northern high latitudes

Zhao, Tianlang; Mao, Jingqiu; Ayazpour, Zolal; González Abad, Gonzalo; Nowlan, Caroline R.; Zheng, Yiqi

doi:https://doi.org/10.5194/acp-24-6105-2024

Articles | Volume 24, issue 10

https://doi.org/10.5194/acp-24-6105-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-6105-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 10

Research article

|

28 May 2024

Research article |

| 28 May 2024

Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers at northern high latitudes

Tianlang Zhao, Jingqiu Mao, Zolal Ayazpour, Gonzalo González Abad, Caroline R. Nowlan, and Yiqi Zheng

Supplement

https://doi.org/10.5194/acp-24-6105-2024-supplement

Data sets

OMPS-NPP L2 NM Formaldehyde (HCHO) Total Column swath orbital V1 (OMPS_NPP_NMHCHO_L2) Gonzalo González Abad https://disc.gsfc.nasa.gov/datasets/OMPS_NPP_NMHCHO_L2_1/summary

High Resolution Global Contiguous SIF Estimates from OCO-2 SIF and MODIS, Version 2 L. Yu et al. https://doi.org/10.3334/ORNLDAAC/1863

Data used in the work "Zhao and Mao 2023: Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers in northern high latitudes'' T. Zhao https://doi.org/10.6084/m9.figshare.23599566.v1

OMI Collection 4 Formaldehyde Retrievals: Towards a Multi-Sensor, Multi-Satellite and Multi-Decadal Dataset (https://waps.cfa.harvard.edu/sao_atmos/data/omi_hcho/OMI-HCHO-L2/) Gonzalo González Abad et al. https://ui.adsabs.harvard.edu/abs/2022AGUFM.A32F1476G/abstract

Model code and software

Holton1/Codes-for-HCHO-interannual-variability-in-northern-high-latitudes: Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers in northern high latitudes T. Zhao https://doi.org/10.5281/zenodo.8094844

geoschem/geos-chem: GEOS-Chem 12.7.2 The International GEOS-Chem Community https://doi.org/10.5281/zenodo.3701669

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Short summary

HCHO variability is a key tracer in understanding VOC emissions in response to climate change. We investigate the role of methane oxidation and biogenic and wildfire emissions in HCHO interannual variability over northern high latitudes in summer, emphasizing wildfires as a key driver of HCHO interannual variability in Alaska, Siberia and northern Canada using satellite HCHO and SIF retrievals and then GEOS-Chem model. We show SIF is a tool to understand biogenic HCHO variability in this region.