2026-05-22T22:32:11Z https://api.figshare.com/v2/oai
oai:figshare.com:article/29882786 2025-08-12T11:20:47Z category_25732 portal_549 item_type_3 month_year_08_2025
10.5522/04/29882786.v1 https://figshare.com/articles/dataset/Vertical_profiles_of_global_seasonal_mean_ozone_in_five_distinct_layers_throughout_the_troposphere/29882786 https://ndownloader.figshare.com/files/57105245 https://ndownloader.figshare.com/files/57105239 https://ndownloader.figshare.com/files/57105242 Horner, Rebekah Rebekah Horner Marais, Eloise Eloise Marais 0000-0001-5477-8051 <![CDATA[Vertical profiles of global seasonal mean ozone in five distinct layers throughout the troposphere]]> Atmospheric composition, chemistry and processes TROPOMI ozone troposphere cloud-slicing GEOS-Chem 2025-08-12 2025-08-12 Dataset 2025 University College London Two datasets (and files) are provided. Both are vertical profiles of tropospheric ozone (O3) 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 O3 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) O3.

The second dataset is GEOS-Chem O3 at the global 2o x 2.5o (latitude x longitude) resolution 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 2015-2019, due to the time-lag in availability of emission inventories of precursors of O3. NaNs in the GEOS-Chem data are high-altitude mountainous regions in the lowest layers or above the tropopause in the highest layers.

Development of a cloud-slicing algorithm for application to TROPOMI using synthetic data from GEOS-Chem, evaluation of the satellite-derived data against global and regional ozonesonde networks and application of the evaluated cloud-sliced data to assess current understanding of tropospheric O3 as simulated with the GEOS-Chem model are detailed in the accompanying paper submitted for review to Wiley's Journal of Geophysical Research (JGR).

]]>