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Issued by: KNMI/Else van den Besselaar

Date: 06/12/2021

Ref: E-OBS

Info
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titleTable of Contents

Table of Contents
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titleClick here to see the history of modifications


Version

Date

Description of modifications

Chapters/sections

1.0

11/07/2019

First version

Whole document

2.0

17/04/2020

Added figures and a more extensive descriptions

Whole document

3.0

31/05/2021

Added description for the global radiation and humidity datasets


4.0

21/06/2021

Added description for the wind strength dataset


4.1

06/12/2021

Added additional information for the global radiation and humidity datasets. Updated fig. 4

About the dataset


Related documents

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titleClick here to see the related documents


Data policy

https://www.ecad.eu/documents/ECAD_datapolicy.pdfImage Modified

ATBD

ECA&D Project Team (2021), European Climate Assessment & Dataset Algorithm Theoretical Basis Document (ATBD), Royal Netherlands Meteorological Institute KNMI, De Bilt, NL. version 10.9.


Acronyms

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titleClick here to the list of acronyms


AcronymsDefinition

ATBD

Algorithm Theoretical Basis Document

ECA&D

European Climate Assessment & Dataset (https://www.ecad.euImage Modified)

EEA

European Environment Agency

E-OBS

Gridded dataset based on the station time series from ECA&D

EUMETNET

grouping of European National Meteorological Services.

NMHS

National Meteorological and Hydrological Service

RA

Regional Association

WMO

World Meteorological Organization


About the dataset

Introduction

...

ECA&D and E-OBS are the backbone for the Climate Data node of the Regional Climate Centre for WMO RA VI (Europe and the Middle East, https://www.ecad.eu/RCC-CD).E-OBS daily gridded observations for Europe from 1950 to present: Product user guide

Main variables

Variable

Unit

Description

Maximum temperature

°C

Daily maximum air temperature measured near the surface, usually at 2 meter height.

Mean temperature

°C

Daily mean air temperature measured near the surface, usually at 2 meter height.

Minimum temperature

°C

Daily minimum air temperature measured near the surface, usually at 2 meter height.

Precipitation amount

mm

Total daily amount of rain, snow and hail measured as the height of the equivalent liquid water in a square meter. The data sources for the precipitation are rain gauge data which do not have a uniform way of defining the 24-hour period over which precipitation measurements are made. Therefore, there is no uniform time period (for instance, 06 UTC previous day to 06 UTC today) which could be attached to the daily precipitation.

Sea level pressure

hPa

Daily mean air pressure at sea level. In regions where the Earth's surface is above sea level the surface pressure is used to compute the air pressure that would exist at sea level directly below given a constant air temperature from the surface to the sea level point.

Surface shortwave downwelling radiation

W/m2

The flux of shortwave radiation (also known as solar radiation) measured at the Earth's surface.

Relative Humidity

%

Daily mean relative humidity measured near the surface usually at a height of 2 meters. Relative humidity values relate to actual humidity and saturation humidity. Values are in the interval \[0,100\]. 0% means that the air in the grid cell is totally dry whereas 100% indicates that the air in the cell is saturated with water vapour.

Wind speed

m/s

Daily mean wind speed at 10 meter height.

The underlying station dataset

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