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Dataset

 

Monthly Gridded Met Office Historical Marine Air Temperature (MOHMATN4) anomalies (1856-2006)

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2007-02-02
Download Stats: last 12 months

Abstract

MOHMAT, (Met Office Historical Marine Air Temperature) is a gridded dataset of marine air temperature anomalies covering the period 1856-2006. The current version of the dataset is MOHMAT4, which is described in reference below (under Doc tab).
MOHMAT is produced by taking in-situ measurements of MAT from ships and buoys, rejecting measurements which fail quality checks, converting the measurements to anomalies by subtracting climatological values from the measurements, and averaging the resulting anomalies on a 5 by 5 degree monthly grid. Note that only night-time data are used, because day-time data are corrupted by heat island effects.

Up to 1996 the measurements used are those in the U.K. Marine Data Bank; more recent years use data coming in through the GTS. MOHMAT is no longer updated.

After gridding the anomalies, bias corrections are applied to remove spurious trends caused by changes in ship deck heights and various unusual operational practices, and the data are smoothed to reduce noise.

The data are provided by the Met Office.

Citable as:  Hadley Centre for Climate Prediction and Research (2007): Monthly Gridded Met Office Historical Marine Air Temperature (MOHMATN4) anomalies (1856-2006). NCAS British Atmospheric Data Centre, date of citation. https://catalogue.ceda.ac.uk/uuid/365e5e62328975643e320d418bc34e95
Abbreviation: GOSTA-MOHMATN4
Keywords: SST, MOHMAT, Met Office, Hadley, anomalies

Details

Previous Info:
No news update for this record
Previously used record identifiers:
http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dep_11704361269313739
Access rules:
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/ukmo_agreement.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data files acquired by the BADC from the Met Office Hadley Centre in 2000.

Data Quality:
Data quality controlled by the Met Office. See documentation provided.
File Format:
Data are ASCII formatted

Process overview

This dataset was generated by the computation detailed below.
Title MOHMATN4 Night Marine Air temperature anomalies data processing deployed on Met Office Hadley Centre Computers
Abstract This computation involved: MOHMATN4 Night Marine Air temperature anomalies data processing deployed on Met Office Hadley Centre Computers. Process used to create the MOHMATN4 dataset.
Input Description None
Output Description None
Software Reference None
  • long_name: Night Marine Air Temperature Anomalies
  • names: Night Marine Air Temperature Anomalies

Co-ordinate Variables

Coverage
Temporal Range
Start time:
1856-01-01T00:00:00
End time:
2006-08-30T23:00:00
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°