First evaluation of the GEMS formaldehyde product against TROPOMI and ground-based column measurements during the in-orbit test period

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Abstract r =  0.62) with high biases (10 %–16 %). We found that the agreement between GEMS and TROPOMI was substantially higher in Northeast Asia (r =  0.90), encompassing the Korean Peninsula and east China. GEMS HCHO VCDs captured the seasonal variation in HCHO, primarily driven by biogenic emissions and photochemical activities, but showed larger variations than those of TROPOMI over coastal regions (Kuala Lumpur, Singapore, Shanghai, and Busan). In addition, GEMS HCHO VCDs showed consistent hourly variations with MAX-DOAS (r =  0.77) and FTIR (r =  0.86) but were 30–40 % lower than ground-based observations. Different vertical sensitivities of GEMS and ground-based instruments caused these biases. Utilizing the averaging kernel smoothing method reduces the low biases by approximately 10 % to 15 % (normalized mean bias (NMB): - - - - 26.7 % for MAX-DOAS and FTIR, respectively). The remaining discrepancies are due to multiple factors, including spatial collocation and different instrumental sensitivities, requiring further investigation using inter-comparable datasets.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
First evaluation of the GEMS formaldehyde product against TROPOMI and ground-based column measurements during the in-orbit test period ; volume:24 ; number:8 ; year:2024 ; pages:4733-4749 ; extent:17
Atmospheric chemistry and physics ; 24, Heft 8 (2024), 4733-4749 (gesamt 17)

Creator
Lee, Gitaek T.
Park, Rokjin J.
Kwon, Hyeong-Ahn
Ha, Eunjo S.
Lee, Sieun D.
Shin, Seunga
Ahn, Myoung-Hwan
Kang, Mina
Choi, Yong-Sang
Kim, Gyuyeon
Lee, Dong-Won
Kim, Deok-Rae
Hong, Hyunkee
Langerock, Bavo
Vigouroux, Corinne
Lerot, Christophe
Hendrick, Francois
Pinardi, Gaia
De Smedt, Isabelle
Van Roozendael, Michel
Wang, Pucai
Chong, Heesung
Cho, Yeseul
Kim, Jhoon

DOI
10.5194/acp-24-4733-2024
URN
urn:nbn:de:101:1-2404250429580.699906874327
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
14.08.2025, 10:49 AM CEST

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Associated

  • Lee, Gitaek T.
  • Park, Rokjin J.
  • Kwon, Hyeong-Ahn
  • Ha, Eunjo S.
  • Lee, Sieun D.
  • Shin, Seunga
  • Ahn, Myoung-Hwan
  • Kang, Mina
  • Choi, Yong-Sang
  • Kim, Gyuyeon
  • Lee, Dong-Won
  • Kim, Deok-Rae
  • Hong, Hyunkee
  • Langerock, Bavo
  • Vigouroux, Corinne
  • Lerot, Christophe
  • Hendrick, Francois
  • Pinardi, Gaia
  • De Smedt, Isabelle
  • Van Roozendael, Michel
  • Wang, Pucai
  • Chong, Heesung
  • Cho, Yeseul
  • Kim, Jhoon

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