This dataset contains the data used to plot results found in the Suppression of surface ozone by an aerosol-inhibited photochemical ozone regime journal article published in Nature Geoscience. The simulations were run using the GEOS-Chem V12.8 chemical transport model at 0.5-degree horizontal resolution over the domain 170W-170E, 10S-60N using 2017 meteorological data for 1750, 1970 and 2014 emissions scenarios. July 2017 GEOS-FP (forward-processing) meteorological fields were used for all simulations. Three experimental runs were performed using 1750 emissions; no sea salt, no dust and no biomass burning emissions. One experiment was run using 1970 emissions; no shipping emissions. Three experimental runs were performed using 2014 emissions with three different HO2 uptake coefficients; 0.1, 0.05 and 0 (no uptake). Surface data is archived for all simulations, additionally, data at pressure levels 200 hPa, and 500 hPa 800 hPa were archived for 2014.

Airborne atmospheric measurements from various instrument suites data on board the FAAM BAE-146 aircraft collected for NCAS general FAAM flying (SeptEx, Winter 2010) project.

Airborne atmospheric measurements from core instrument suite data on board the FAAM BAE-146 aircraft during flight 1 for NCAS general FAAM flying (SeptEx, Winter 2010) project.

Airborne atmospheric measurements from core instrument suite data on board the FAAM BAE-146 aircraft during flight 3 for NCAS general FAAM flying (SeptEx, Winter 2010) project.

Airborne atmospheric measurements from core instrument suite data on board the FAAM BAE-146 aircraft collected for NCAS general FAAM flying (SeptEx, Winter 2010) project.

Airborne atmospheric measurements from core instrument suite data on board the FAAM BAE-146 aircraft during flight 4 for NCAS general FAAM flying (SeptEx, Winter 2010) project.

Data from observations made at the Cape Verde Atmospheric Observatory (CVAO) which exists to advance understanding of climatically significant interactions between the atmosphere and ocean and to provide a regional focal point and long-term data. The observatory is based on Calhau Island of São Vicente Cape Verde at 16.848N, 24.871W, in the tropical Eastern North Atlantic Ocean, a region which is data poor but plays a key role in atmosphere-ocean interactions of climate-related and biogeochemical parameters including greenhouse gases. It is an open-ocean site that is representative of a region likely to be sensitive to future climate change, and is minimally influenced by local effects and intermittent continental pollution. The dataset collection contains mixing ratio measurements of Ozone, CO, ethane, propane, iso-butane, acetylene, iso-pentane, and halocarbons. Meteorological measurements (wind speed, wind direction, atmospheric pressure, air temperature, relative humidity, solar radiation, rainfall) and aerosol concentrations are also contained in the data set. The Cape Verde Observatory was previously used during the SOLAS (Surface Ocean / Lower Atmosphere Study) project, from which the present day continuous observations have evolved. As such the earlier SOLAS measurements are also included within this collection. Additionally, back trajectory plots for the site are also within this collection.

The BT Tower is a 190-m-tall telecommunications tower situated in central London, UK (51°31′17.4″N, 0°8′20.04″W). Mean building height is 8.8 ± 3.0 m within 1−10 km of the tower and 5.6 ± 1.8 m for suburban London beyond this. This dataset collection contains O3 and NOx measurements made at the BT tower (T35 level) sampled from a height of approx 180 metres above the ground. The measurements were made using a TEI 49i analyser and TEI 42CTL analyser.

The FAAM is a large atmospheric research BAE-146 aircraft, run jointly by the NERC and the UK Met Office. It has been in operation since March 2004 and is at the scientists' disposal through a scheme of project selection. Data collected by this aircraft is stored in the FAAM data archive and includes "core" data, provided by the FAAM as a support to all flight campaigns, and "non-core" data, the nature of which depends on the scientific goal of the campaign. FAAM instruments provide four types of data: - parameters required for aircraft navigation; - meteorology; - cloud physics; - chemical composition. The data are accompanied by extensive metadata, including flight logs. The FAAM apparatus includes a number of core instruments permanently onboard and operated by FAAM staff members, and a variety of other instruments, grouped into chemistry kit and cloud physics kit, that can be fitted onto the aircraft on demand. FAAM is also a member of the EUropean Facility for Airborne Research (EUFAR) fleet of research aircraft. Apart from some exceptions, access to processed core data is public but requires an online application (application is granted automatically after agreement with the FAAM Conditions of Use). Access to non-core data is ruled by the relevant protocols in force for each project.

Airborne atmospheric measurements from core and non-core instrument suites data on board the FAAM BAE-146 aircraft during flight 2 for NCAS general FAAM flying (SeptEx, Winter 2010) project.