Estimation of OH in urban plume using TROPOMI inferred NO2/CO

Lama, Srijana; Houweling, Sander; Boersma, K. F.; Aben, I.; Gon, Hugo A. C. Denier Van Der; Krol, Maarten

doi:10.1002/essoar.10510109.2

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Observing and Fitting Urban Hcho Plume: An Example From Riyadh1

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2023

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“…Our attempt starts with Riyadh (Saudi Arabia), one of the largest cities on the Arabian Peninsula and is usually considered as an ideal place for satellite detection of urban plumes (e.g., NO2 and CO) due to its isolated location, large emission, and frequent clear sky conditions (Beirle et al, 2011;Lama et al, 2022;Valin et al, 2013). It is also an optimal spot to observe the HCHO urban plume as it is surrounded by desert and has low biogenic VOC emissions.…”

Section: Observing and Fitting Urban Hcho Plume: An Example From Riyadhmentioning

confidence: 99%

Observing downwind structures of urban HCHO plumes from space: Implications to non-methane volatile organic compound emissions

Zuo,

Sun,

Smedt

et al. 2023

Preprint

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Non-methane volatile organic compounds (NMVOCs) have a significant impact on air quality in urban areas. Detecting NMVOCs emission with its proxy HCHO on urban scales from space, however, has been limited by the lack of discernible enhancement. Here we show clear urban HCHO plumes from 11 cities over the globe by rotating TROPOspheric Monitoring Instrument (TROPOMI) HCHO pixels according to wind directions. We fit the downwind structure of the plumes with the exponentially modified Gaussian (EMG) approach to quantify urban HCHO effective production rates between 22.7 mol s-1 and 115.8 mol s-1. Our results are in line with estimations using the EDGAR inventory (r = 0.81). Our work offers a new way of constraining NMVOC emissions from urban areas and highlights the potential of satellite HCHO data to provide new information for monitoring urban air quality.

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Section: Observing and Fitting Urban Hcho Plume: An Example From Riyadhmentioning

confidence: 99%