Dataset
GloSATMAT: monthly, global, gridded marine air temperature data
Abstract
GloSATMAT is a global dataset of monthly mean marine air temperature that is produced on a 5° latitude by 5° longitude regular grid and covers the period since 1784.
The temperature values are taken from version 3.0.0 of the International Comprehensive Ocean-Atmosphere Data Set (ICOADS) for the period 1784-2014 and from version 3.0.2 of ICOADS thereafter. The in situ air temperature readings have been extracted from ICOADS and the ship data have been adjusted to reduce the effects of varying thermometer heights and to remove artificial diurnal heating biases. The data have been adjusted from their respective recording heights to a reference height of 2m. The air temperature readings have been subjected to a quality-control procedure and then the values have been aggregated to form gridded averages, with corresponding uncertainty estimates.
This dataset has been developed under the following NERC-funded projects: GloSAT (NE/S015647/2), CLASS (NE/R015953/1) and AtlantiS (NE/Y005589/1).
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(s): http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
This dataset uses the same data processing as used in CLASSnmat v2. However, a diurnal adjustment has been applied to the data (after Cropper et al. 2023) that enables all-hours observations to be used (as opposed to nighttime-only in CLASSnmat). This allows the dataset to extend back to 1784. Details of the data processing are documented in Morice et al. (2024). |
| Data Quality: |
The same quality control procedure as used in CLASSnmat v2 have been applied to these data, with details provided in Morice et al. (2024)
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| File Format: |
NetCDF
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Related Documents
Process overview
| Title | GloSATMAT computation |
| Abstract | The temperature values are taken from version 3.0.0 of the International Comprehensive Ocean-Atmosphere Data Set (ICOADS) for the period 1880-2014 and from version 3.0.2 of ICOADS thereafter. The ship data have been adjusted to reduce the effects of varying thermometer heights and the effects of artificial heating biases. The data have been adjusted from their respective recording heights to a reference height of 2m. The air temperature readings have been subjected to a quality-control procedure and values that fail these tests have been excluded. Duplicate values have also been excluded. Additional adjustments have been applied to the data during the Second World War to account for non-standard thermometer exposures on some ships. The adjusted data have been aggregated into monthly mean values in each grid-cell; uncertainty estimates of these gridded values are also provided. The data have not been interpolated across missing grid boxes. In addition to the absolute temperature values, the gridded data also contain anomalies that are expressed with respect to 1961-90 climatological averages. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
No variables found.
Temporal Range
1781-01-01T00:00:00
Ongoing
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
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-90.0000° |