Dataset
Obs4MIPs: Monthly-mean diurnal cycle of top of atmosphere outgoing shortwave radiation from the GERB instrument (GERB-HR-ED01-1-1 rsut 1hrCM), v20231221
Abstract
This dataset contains top of atmosphere (TOA) outgoing shortwave radiation from the Geostationary Earth Radiation Budget (GERB) instrument on board the Meteosat-9 geostationary satellite, for the period from May 2007 until December 2012. In this dataset (labelled 'GERB-HR-ED01-1-1 rsut 1hrCM'), the data provided consist of monthly-mean diurnal cycles, with each day resolved into 1-hour means. Data are only available for eight months of each year (January, February, May, June, July, August, November and December), due to operational constraints of the GERB instrument.
This is version 1.1 of the product and contains significant improvements over the original version. These improvements include lower estimated uncertainties owing to missing data having been filled where possible and subsequently a greater availability of data within the period provided. Users are strongly encouraged to use this latest version of the products.
It has been produced in Obs4MIPs (Observations for Model Intercomparisons Project) format, as part of an activity to increase the use of GERB satellite observational data for the modelling and model analysis communities. This is not currently a standard GERB satellite instrument product, but does represent an effort on behalf of the GERB project team to identify a product that is appropriate for routine model evaluation. The data have been reprocessed and reformatted, utilising additional data sources where necessary, to create a product primarily intended for comparison with climate model output.
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://creativecommons.org/licenses/by/4.0/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA). |
| Data Quality: |
For information on the data quality see the associated technical note
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| File Format: |
Data are in NetCDF format
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Process overview
Instrument/Platform pairings
| Geostationary Earth Radiation Budget Experiment 1 (GERB-1) | Deployed on: Meteosat Second Generation 2 (MSG-2) or METEOSAT-9 |
Mobile platform operations
| Mobile Platform Operation 1 | Mobile Platform Operation for: Meteosat Second Generation 2 (MSG-2) or METEOSAT-9 |
Computation Element: 1
| Title | Processing chain for the GERB-HR-ED01-1-1 rsut 1hrCM Obs4MIPS v1.1 product, |
| Abstract | The GERB TOA reflected shortwave radiation (RSW) Obs4MIPs product has been generated from GERB level 2 HR RSW fluxes. There are five main stages. The first is to take the Edition 1 GERB HR SW flux data with the user corrections applied and generate an albedo using knowledge of the incoming SW flux for each location and time. The albedo is then area weighted to create a 1° by 1° spatial resolution albedo for every 15-minute time interval. These data are then averaged over time to produce an hourly averaged albedo product for each hour of each day. Each hour interval is defined as the time-centred mean at half-past the hour, e.g. 1030 UTC comprises the mean of albedos from 1000 UTC, 1015 UTC, 1030 UTC and 1045 UTC (or from those slots in this window that are available). An hourly average albedo is produced for a 1° by 1° grid cell if there is one or more observation from the four observation times available for that grid cell. The averaged albedos are converted back to RSW flux using the incoming solar flux at the midpoint of the hour and 1° cell. The fourth stage identifies days where there are no observations available for the hour and fills them with broadband RSW fluxes derived from the narrowband SEVIRI data, averaged to the daily hourly scale in the same way as the GERB data and corrected to the GERB observations at the monthly hourly 1° scale1. Finally, a monthly mean for each hourly time step is calculated encompassing the full data. The number of filled data points (days per monthly hourly average) contributing to each monthly hourly mean are used to estimate the uncertainties associated with the product. For more detailed information please see: Bantges, R., Russell, J., & Brindley, H. (2023). GERB-HR-ED01 rsut 1hrCM v1.1. Zenodo. https://doi.org/10.5281/zenodo.10034410. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
| Output Description | None |
No variables found.
Temporal Range
2007-05-01T00:00:00
2012-12-31T23:59:59
Geographic Extent
60.0000° |
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-60.0000° |
60.0000° |
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-60.0000° |