2026-05-23T05:43:38Z https://api.figshare.com/v2/oai
oai:figshare.com:article/25782336 2024-05-14T10:00:27Z category_25732 portal_549 item_type_3 month_year_05_2024
10.5522/04/25782336.v1 https://figshare.com/articles/dataset/Vertical_profiles_of_global_seasonal_mean_nitrogen_dioxide_in_five_distinct_layers_in_the_troposphere/25782336 https://ndownloader.figshare.com/files/46300915 https://ndownloader.figshare.com/files/46300903 https://ndownloader.figshare.com/files/46300906 Marais, Eloise Eloise Marais 0000-0001-5477-8051 Horner, Rebekah Rebekah Horner <![CDATA[Vertical profiles of global seasonal mean nitrogen dioxide in five distinct layers in the troposphere]]> Atmospheric composition, chemistry and processes TROPOMI NO2 GEOS-Chem troposphere cloud-slicing 2024-05-14 2024-05-14 Dataset 2024 University College London Two datasets (and files) are provided. Both are vertical profiles of tropospheric nitrogen dioxide (NO2) in five distinct layers in the atmosphere: one in the boundary layer (below 800 hPa), two in the middle troposphere (800-600 hPa, 600-450 hPa), and two in the upper troposphere (450-320 hPa, 320-180 hPa). The first is derived with TROPOMI satellite observations and the second simulated with the GEOS-Chem chemical transport model (CTM).

The satellite-derived data are obtained by cloud-slicing TROPOMI partial columns (stratosphere + troposphere) of NO2 retrieved above optically thick clouds (optical cloud fraction > 0.7) from June 2018 to May 2022 to obtain seasonal multiyear mean global gridded (1o x 1o) NO2.

The second dataset is GEOS-Chem NO2 at 2o x 2.5o sampled at 12:00-15:00 local solar time (LST) to be centred at the TROPOMI overpass time (13:30 LST). The model data are also multiyear means, but for 2016-2019.

Evaluation of the satellite-derived data against NASA DC8 aircraft observations and application of the evaluated cloud-sliced data to assess current understanding of tropospheric NOx as simulated with the GEOS-Chem model are detailed in the accompanying paper submitted for review in the Atmospheric Chemistry and Physics (ACP) journal.

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