The World Climate Research Program (WCRP) Coupled Model Intercomparison Project, Phase 6 (CMIP6) data from the Met Office Hadley Centre (MOHC) HadGEM3-GC31-MM model output for the "Atmosphere time slice with present day coupled model SST and future Arctic SIC" (modelSST-futArcSIC) experiment. These are available at the following frequencies: Amon, EmonZ, SImon and day. The runs included the ensemble members: r100i1p1f2, r101i1p1f2, r102i1p1f2, r103i1p1f2, r104i1p1f2, r105i1p1f2, r106i1p1f2, r107i1p1f2, r108i1p1f2, r109i1p1f2, r10i1p1f2, r110i1p1f2, r111i1p1f2, r112i1p1f2, r113i1p1f2, r114i1p1f2, r115i1p1f2, r116i1p1f2, r117i1p1f2, r118i1p1f2, r119i1p1f2, r11i1p1f2, r120i1p1f2, r121i1p1f2, r122i1p1f2, r123i1p1f2, r124i1p1f2, r125i1p1f2, r126i1p1f2, r127i1p1f2, r128i1p1f2, r129i1p1f2, r12i1p1f2, r130i1p1f2, r131i1p1f2, r132i1p1f2, r133i1p1f2, r134i1p1f2, r135i1p1f2, r136i1p1f2, r137i1p1f2, r138i1p1f2, r139i1p1f2, r13i1p1f2, r140i1p1f2, r141i1p1f2, r142i1p1f2, r143i1p1f2, r144i1p1f2, r145i1p1f2, r146i1p1f2, r147i1p1f2, r148i1p1f2, r149i1p1f2, r14i1p1f2, r150i1p1f2, r151i2p1f2, r152i2p1f2, r153i2p1f2, r154i2p1f2, r155i2p1f2, r156i2p1f2, r157i2p1f2, r158i2p1f2, r159i2p1f2, r15i1p1f2, r160i2p1f2, r161i2p1f2, r162i2p1f2, r163i2p1f2, r164i2p1f2, r165i2p1f2, r166i2p1f2, r167i2p1f2, r168i2p1f2, r169i2p1f2, r16i1p1f2, r170i2p1f2, r171i2p1f2, r172i2p1f2, r173i2p1f2, r174i2p1f2, r175i2p1f2, r176i2p1f2, r177i2p1f2, r178i2p1f2, r179i2p1f2, r17i1p1f2, r180i2p1f2, r181i2p1f2, r182i2p1f2, r183i2p1f2, r184i2p1f2, r185i2p1f2, r186i2p1f2, r187i2p1f2, r188i2p1f2, r189i2p1f2, r18i1p1f2, r190i2p1f2, r191i2p1f2, r192i2p1f2, r193i2p1f2, r194i2p1f2, r195i2p1f2, r196i2p1f2, r197i2p1f2, r198i2p1f2, r199i2p1f2, r19i1p1f2, r1i1p1f2, r200i2p1f2, r201i2p1f2, r202i2p1f2, r203i2p1f2, r204i2p1f2, r205i2p1f2, r206i2p1f2, r207i2p1f2, r208i2p1f2, r209i2p1f2, r20i1p1f2, r210i2p1f2, r211i2p1f2, r212i2p1f2, r213i2p1f2, r214i2p1f2, r215i2p1f2, r216i2p1f2, r217i2p1f2, r218i2p1f2, r219i2p1f2, r21i1p1f2, r220i2p1f2, r221i2p1f2, r222i2p1f2, r223i2p1f2, r224i2p1f2, r225i2p1f2, r226i2p1f2, r227i2p1f2, r228i2p1f2, r229i2p1f2, r22i1p1f2, r230i2p1f2, r231i2p1f2, r232i2p1f2, r233i2p1f2, r234i2p1f2, r235i2p1f2, r236i2p1f2, r237i2p1f2, r238i2p1f2, r239i2p1f2, r23i1p1f2, r240i2p1f2, r241i2p1f2, r242i2p1f2, r243i2p1f2, r244i2p1f2, r245i2p1f2, r246i2p1f2, r247i2p1f2, r248i2p1f2, r249i2p1f2, r24i1p1f2, r250i2p1f2, r251i2p1f2, r252i2p1f2, r253i2p1f2, r254i2p1f2, r255i2p1f2, r256i2p1f2, r257i2p1f2, r258i2p1f2, r259i2p1f2, r25i1p1f2, r260i2p1f2, r261i2p1f2, r262i2p1f2, r263i2p1f2, r264i2p1f2, r265i2p1f2, r266i2p1f2, r267i2p1f2, r268i2p1f2, r269i2p1f2, r26i1p1f2, r270i2p1f2, r271i2p1f2, r272i2p1f2, r273i2p1f2, r274i2p1f2, r275i2p1f2, r276i2p1f2, r277i2p1f2, r278i2p1f2, r279i2p1f2, r27i1p1f2, r280i2p1f2, r281i2p1f2, r282i2p1f2, r283i2p1f2, r284i2p1f2, r285i2p1f2, r286i2p1f2, r287i2p1f2, r288i2p1f2, r289i2p1f2, r28i1p1f2, r290i2p1f2, r291i2p1f2, r292i2p1f2, r293i2p1f2, r294i2p1f2, r295i2p1f2, r296i2p1f2, r297i2p1f2, r298i2p1f2, r299i2p1f2, r29i1p1f2, r2i1p1f2, r300i2p1f2, r30i1p1f2, r31i1p1f2, r32i1p1f2, r33i1p1f2, r34i1p1f2, r35i1p1f2, r36i1p1f2, r37i1p1f2, r38i1p1f2, r39i1p1f2, r3i1p1f2, r40i1p1f2, r41i1p1f2, r42i1p1f2, r43i1p1f2, r44i1p1f2, r45i1p1f2, r46i1p1f2, r47i1p1f2, r48i1p1f2, r49i1p1f2, r4i1p1f2, r50i1p1f2, r51i1p1f2, r52i1p1f2, r53i1p1f2, r54i1p1f2, r55i1p1f2, r56i1p1f2, r57i1p1f2, r58i1p1f2, r59i1p1f2, r5i1p1f2, r60i1p1f2, r61i1p1f2, r62i1p1f2, r63i1p1f2, r64i1p1f2, r65i1p1f2, r66i1p1f2, r67i1p1f2, r68i1p1f2, r69i1p1f2, r6i1p1f2, r70i1p1f2, r71i1p1f2, r72i1p1f2, r73i1p1f2, r74i1p1f2, r75i1p1f2, r76i1p1f2, r77i1p1f2, r78i1p1f2, r79i1p1f2, r7i1p1f2, r80i1p1f2, r81i1p1f2, r82i1p1f2, r83i1p1f2, r84i1p1f2, r85i1p1f2, r86i1p1f2, r87i1p1f2, r88i1p1f2, r89i1p1f2, r8i1p1f2, r90i1p1f2, r91i1p1f2, r92i1p1f2, r93i1p1f2, r94i1p1f2, r95i1p1f2, r96i1p1f2, r97i1p1f2, r98i1p1f2, r99i1p1f2 and r9i1p1f2. CMIP6 was a global climate model intercomparison project, coordinated by PCMDI (Program For Climate Model Diagnosis and Intercomparison) on behalf of the WCRP and provided input for the Intergovernmental Panel on Climate Change (IPCC) 6th Assessment Report (AR6). The official CMIP6 Citation, and its associated DOI, is provided as an online resource linked to this record.

The gridded Climatic Research Unit (CRU) Time-series (TS) data version 4.05 data are month-by-month variations in climate over the period 1901-2020, provided on high-resolution (0.5x0.5 degree) grids, produced by CRU at the University of East Anglia and funded by the UK National Centre for Atmospheric Science (NCAS), a NERC collaborative centre. The CRU TS4.05 variables are cloud cover, diurnal temperature range, frost day frequency, wet day frequency, potential evapotranspiration (PET), precipitation, daily mean temperature, monthly average daily maximum and minimum temperature, and vapour pressure for the period January 1901 - December 2020. The CRU TS4.05 data were produced using angular-distance weighting (ADW) interpolation. All versions prior to 4.00 used triangulation routines in IDL. Please see the release notes for full details of this version update. The CRU TS4.05 data are monthly gridded fields based on monthly observational data calculated from daily or sub-daily data by National Meteorological Services and other external agents. The ASCII and NetCDF data files both contain monthly mean values for the various parameters. The NetCDF versions contain an additional integer variable, ’stn’, which provides, for each datum in the main variable, a count (between 0 and 8) of the number of stations used in that interpolation. The missing value code for 'stn' is -999. All CRU TS output files are actual values - NOT anomalies.

Data from the Advanced Synthetic Aperture Radar (ASAR) on-board ENVISAT are available for the UK from 2002-2009. The raw data for the alternating polarisation, wide swath and image modes were acquired by the Landmap project from ESA and processed to produce 8 and 32-bit greyscale and multi-difference colour composite geotiff images. The Joint Information Systems Committee (JISC) funded Landmap service which ran from 2001 to July 2014 collected and hosted a large amount of earth observation data for the majority of the UK. After removal of JISC funding in 2013, the Landmap service is no longer operational, with the data now held at the NEODC. When using these data please also add the following copyright statement: © ESA 2004/2005/2006/2007/2008…. Received and Distributed by University of Manchester under licence from the European Space Agency

Daily concatenated files of ceilometer cloud base height and aerosol profile data from Météo-France's Vaisala CL31 deployed at Bastia, France. These data were produced by the EUMETNET's E-PROFILE processing hub as part of the ceilometer and lidar network operated as part of the by EUMETNET members. This network covers most of Europe with additional sites worldwide. The site has a corresponding WMO Integrated Global Observing System (WIGOS) id: 0-20000-0-07790. See online documentation for link to station details in the Observing Systems Capability Analysis and Review (OSCAR) Tool. EUMETNET is a grouping of 31 European National Meteorological Services that provides a framework to organise co-operative programmes between its Members in the various fields of basic meteorological activities. One such programme is the EUMETNET Profiling Programme: E-PROFILE. See EUMETNET page linked from this record for further details of EUMETNET's activities.

Hyperspectral remote sensing measurements using the Airborne Prism Experiment (APEX) instrument onboard the DO228-212 /D-CFFU - DLR aircraft for the HYPPOS- HYdrodynamic control of Primary Producers in Optically Shallow fluvial lakes project (flight reference: apex_dlr-dornier_20140927_hyppos). Data were collected over the Mantua, Northern Italy area. The APEX (Airborne Prism EXperiment) instrument is an imaging spectrometer developed by a Swiss-Belgian consortium on behalf of ESA. It is operated jointly by VITO (Belgium) and RSL (Switzerland). Please see the link to the APEX website from this record for further details.

The Atmospheric Chemistry Studies in the Oceanic Environment (ACSOE) was a 5-year Natural Environment Research Council (NERC) programme on tropospheric chemistry coordinated by the University of East Anglia and involving research groups from a number of UK universities and research institutes. The Meteorological Research Flight (MRF) was a Met Office facility, which flew a well-instrumented C-130 Hercules aircraft for atmospheric research purposes. This dataset contains airborne atmospheric and chemistry measurements taken on board the Met Office C-130 Hercules aircraft flight A478 for the ACSOE project.

Airborne atmospheric measurements from non-core instrument suite data on board the FAAM BAE-146 aircraft during flight 16 for FAAM Test, Calibration, Training and Non-science Flights and other non-specified flight projects.

Cascade was a NERC funded consortium project to study organized convection and scale interactions in the tropical atmosphere using large domain cloud system resolving model simulations. This dataset contains data from the xeydaa simulation which ran using the Met Office Unified Model (UM) at 1.5km horizontal resolution over the domain 20W-20E, 5S-28N which encompasses the west african monsoon. Cascade Africa simulations are used to study African Easterly Waves. This dataset contains 1.5km Africa model measurements from xeydaa run.

Computed air parcel trajectory used for campaign support during the Atmospheric Chemistry Studies in the Oceanic Environment (ACSOE) programme.

The World Climate Research Program (WCRP) Coupled Model Intercomparison Project, Phase 6 (CMIP6) data from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) ACCESS-ESM1-5 model output for the "AMIP" (amip) experiment. These are available at the following frequencies: 3hr, 6hrLev, 6hrPlevPt, Amon, Emon, LImon, Lmon, SImon, day and fx. The runs included the ensemble members: r1i1p1f1, r2i1p1f1 and r3i1p1f1. CMIP6 was a global climate model intercomparison project, coordinated by PCMDI (Program For Climate Model Diagnosis and Intercomparison) on behalf of the WCRP and provided input for the Intergovernmental Panel on Climate Change (IPCC) 6th Assessment Report (AR6). The official CMIP6 Citation, and its associated DOI, is provided as an online resource linked to this record.