Digital Object Identifier
Entry information for COMBI_V001

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Title

A combined high resolution global TCWV product from microwave and near infrared imagers - COMBI

Citation

Schröder, Marc; Danne, Olaf; Falk, Ulrike; Niedorf, Anja; Preusker, Rene; Trent, Tim; Brockmann, Carsten; Fischer, Jürgen; Hegglin, Michaela; Hollmann, Rainer; Pinnock, Simon (2023): A combined high resolution global TCWV product from microwave and near infrared imagers - COMBI, Satellite Application Facility on Climate Monitoring, DOI:10.5676/EUM_SAF_CM/COMBI/V001, https://doi.org/10.5676/EUM_SAF_CM/COMBI/V001. [BibTeX entry]

Publisher

Satellite Application Facility on Climate Monitoring (CM SAF)

Publication year

2023

Author(s)

Schröder, Marc; Danne, Olaf; Falk, Ulrike; Niedorf, Anja; Preusker, Rene; Trent, Tim; Brockmann, Carsten; Fischer, Jürgen; Hegglin, Michaela; Hollmann, Rainer; Pinnock, Simon

Description

The global total column water vapour (TCWV) data record combines microwave and near-infrared imager based TCWV over the ice-free ocean as well as over land, coastal ocean and sea-ice, respectively. The data record relies on microwave observations from SSM/I, SSMIS, AMSR-E and TMI, partly based on a fundamental climate data record (Fennig et al., 2020; Fennig et al., 2017) and on near-infrared observations from MERIS (3rd reprocessing), MODIS-Terra (collection 6.1) and OLCI (1st reprocessing). Details of the retrieval are described in Andersson et al. (2010) and ATBD HOAPS for the microwave imagers as well as in Lindstrot et al. (2012), Diedrich et al. (2015) and ABTD NIR Level 2 for the near-infrared imagers. The water vapour of the atmosphere is vertically integrated over the full column and given in units of kg/m². The microwave and near-infrared data streams are processed independently and combined afterwards by not changing the individual TCWV values and their uncertainties. The combined data record has a spatial resolution of 0.5°x0.5° and 0.05°x0.05°, with the near-infrared based data being averaged and the microwave-based data being oversampled to match the lower and higher spatial resolution, respectively. The product is available as daily and monthly means and covers the period July 2002 – December 2017.

Format

NetCDF-4

Version

3.1

Temporal coverage

2002-07-01 - 2017-12-31

Geographic coverage

Latitude: -90° S to 90° N
Longitude: -180° W to 180° E

Size

290 GiB

Documentation

Related publications

Related Data Records

Comment

The combined MW and NIR product was initiated and funded by the ESA Water_Vapour_cci project. The NIR retrieval was developed by Spectral Earth. The MW data was processed by EUMETSAT CM SAF. The NIR data was processed and combined with the MW data by Brockmann Consult. NIR data is owned by Brockmann Consult and Spectral Earth. The MW data and the combined MW and NIR product is owned by EUMETSAT CM SAF.

Please note, that the monthly and daily mean products (see below) are each available in two different spatial resolutions, namely 0.5 and 0.05 degrees.

Data record details and ordering

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