User guide to WebDab

Introduction 

The UNECE/EMEP emission database gives you access to national total, sector and gridded emissions for the listed areas, years, pollutants/activity classes and total/sector categories. For information and retrieval of modeled data, please visit also the  EMEP home page. Three different types of data sets can be accessed:

  • Officially reported emission data
  • Emissions as used in EMEP models
  • Officially reported activity data

Additionally you can visualize gridded emissions and large point source (LPS) data in Google Maps/Earth.

The menu on the left side of this page (and all other pages) provides links to seven related sections:  "Officially reported emission data", "Emissions as used in EMEP models",  "Officially reported activity data", "Gridded emissions in Google Maps", "LPS emissions in Google Maps", "User Guide to WebDab" (this page), and the introduction "Emission Data (WebDab)".

Selection boxes 

On the five web pages for retrieving data ("Officially reported emission data", "Emissions as used in EMEP models", "Officially reported activity data", "Gridded emissions in Google Maps", "LPS emissions in Google Maps") you will find buttons to start the search in WebDab.

Clicking on such a button opens a new browser window with a search assistant, where you can select step by step the emission data you want to retrieve from WebDab. The search assistant offers selection boxes for selecting countries/areas, years, pollutants/activities, components and total/sector categories, where one or more entries in each box are selectable by clicking on the requested items. Some selection boxes allows multiple selections. Please consult your browser's manual for instructions how to perform a multiple select. 

The search assistant guides you through the selecting process, whereas the content of the next screen always depends on the previous selections you made. So if you select e.g. a certain country and year in "Emissions as reported by Parties" and press the "Search" button, the next page will list only pollutants for selecting, which are available for the particular country and year.

A list box may have an "All" entry which is used to get all items in the list box. Some list boxes have other such collective entries which are used to select several items with one mouse click. Use of these entries is only intended to relieve the user from clicking on each individual item. The result seen in the browser will be the same as if each item were selected individually.

In "Officially reported emission data" and "Emissions as used in EMEP models" you will find a second button labeled with "Trends". Click on this button to display trend graphs and tables from 1990 to the latest available year by selecting only country and year.

Units 

The unit for non-gridded data can be switched between "g", "kg", "Mg" and "Gg". For gridded data the unit is Mg.

Further SOx is given as SO2, NOx as NO2, NMVOC as NMVOC, NH3 as NH3, CO as CO.

Officially reported emission data

Emission data officially submitted by the Parties to the CLRTAP Convention on Long Range Transboundary Air Pollutants to the EMEP project via the UNECE secretariat are available from this site. Please note that these data might be inconsistent and/or incomplete.

Start by pushing the button "Search for officially reported emission data". A new browser window with the search assistant opens. Click you through this assistant and select one or more items from each of the list boxes described below.

Countries/Areas:

Contains a list of all countries reporting to the UN-ECE. Above the hyphens line (----) are four collective entries: ALL, EU15, EU25, and EU27 (i.e. EU15 plus Bulgaria, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Romania, Slovakia, Slovenia).

Years:

Years for which Parties to the Convention on LRTAP have reported emissions and projections, i.e. emission years 1980-2008 and projections for 2010, 2015, 2020, 2025 and 2030. Please note that according to the Guidelines for Estimating and Reporting Emission data, there is no obligation to report PM emissions before the year 2000. HMs and POPs reporting obligation is from 1990 onwards.

Reported until:

Non-gridded emissions should be reported to EMEP annually. Emission data for the actual year of reporting minus two years are requested (i.e. year 2008 emissions are reported in 2010). Gridded emissions (and activity data),  should only be reported every fifth year, starting with emission year 1990 (reporting year 1992).

If 2010 is chosen as "Latest Year of Reporting", you will retrieve the most updated emission data available from the database for the selected emission year(s) and emission category.

Select output format:

Six selections are possible, depending on the type of data, non-gridded (Totals/Sectors) in either HTML or colon separated data format and gridded data, available in semi-colon separated format or graphic maps. Projections are marked in red color in HTML tables and a suffix "p" is added to the emission year in semi-colon separated files (i.e. 2010p).

Pollutants:

Pollutants in WebDab are divided into four different groups:

  • Main Pollutants: The main acidifying and eutrophying pollutants.
  • PM: Particulate matter: PM10, PM2.5, TSP.
  • Heavy metals: As, Cd, Cr, Cu, Hg, Ni, Pb, Se and Zn.
  • POP: Persistent organic pollutants.

Please be aware, that the list contains only entries which are available due to the previous selection.

Emission Category:

There are four distinctly different emission categories linked to the four sets of UNECE Guidelines for Estimating and Reporting emission data,  NFR09 / Guidelines 2009,  NFR02 / Guidelines 2002,  NFR01 / Guidelines 2001, and  SNAP / Guidelines 1997. Additionally you can select national totals for NFR09, NFR02 or SNAP with the first entry "National Total (NFR09 / NFR02 / SNAP)" in the list. For national totals data this three emission categories are combined, because as a result of this selection you get always the latest available data, independent from the category. E.g. if there are two national total values available for a selection, one in NFR09 and one in NFR02, and the NFR09 value has the most recent date, this value is presented as result. For users not familiar with the different EMEP/CORINAIR source categories, it is highly recommended to visit the links above before starting to request data from WebDab. Different levels of emission aggregation can be selected if available:

  • NFR Level 1: Available for NFR01, NFR02 and NFR09 --> Sector aggregation used for gridding
  • NFR Level 2: Available for NFR01, NFR02 and NFR09 -->Detailed sector data (reporting requirements)
  • Projections WM (projections with measures): Reported projection data should show the expected future development of polluting activity and of emissions ('current legislation projections') based on national assumptions concerning projected activity levels and considering all legal regulations or other binding measures in place.
  • Projections WaM (projections with additional measures): In addition, each Party should report on current reduction plans ('reduction projections') taking into account its obligations under the Protocols. Current legislation projections may deviate from current reduction plans in either direction depending on the state of legislation and projected future activity levels.
  • NFR01 - National total including oversea: Is "national protocol total" plus emissions in NFR 11, other sources and sinks, plus any emissions outside of the EMEP domain. For definition of EMEP domain see: http://www.emep.int/grid/grid50.pdf.
  • NFR01 - National total excluding oversea: The emissions per country regulated by their respective Protocols to the Convention of Long Range Transboundary Air Pollution.
  • NFR01 - Oversea Total: Emissions outside of the EMEP domain form countries situated mainly within the EMEP area.
  • SNAP - S1 to S11: Emissions reported in SNAP sectors

Please be aware, that the search assistant provides only emission categories which are available for the previous country, year and pollutant selection. If some categories are missing, this means that, based on the previous selection, there is no data available in this categories.

Sectors:

Only the sectors are listed which fits to your country, year and emission category selection. So in some cases there is no sector selection and in other cases you have to specify the sectors you want to retrieve from the database. If you choose no sector from the list, all available sectors are listed in the result.

In order to be able to select the correct sectors, the user is referred to the  NFR08 / Guidelines 2009 and  NFR02 / Guidelines 2002.

HTML Table (columns and rows):

Here you can choose which data you want to display in the columns and rows of the HTML table, depending on your needs. You can also preselect the result unit, which can be changed directly on the result page too.

Information & Footnotes:

If you wish to see the comments to officially reported emission data as provided by the Parties, please flag this item. An CEIP internal report code (for example U-AT09) together with the date the emissions were received by the UNECE (for example 2009-02-15) will also appear.

If you choose to display HTML tables, the information will appear as footnotes at the bottom of the HTML tables. You can also hide and unhide this information directly in the result page.

If you prefer to see semi-colon separated files, the information will appear in the heading (separated out with hashes "#"), in front of each report the data is taken from.

The user should refer to the report code if  having questions to a certain set of data.

Emissions as used in EMEP models

Contains national total emissions, sector data and gridded emission data used for modeling purposes at MSC-W and MSC-E. The site also contains scenarios used in the framework of the CAFE project.

Emission data is based on officially reported emissions to the extent possible, but some of the officially reported data have been corrected and gaps have been filled ( Important information on data consistency).

The modeling centres of EMEP are using the anthropogenic part of the emissions in their modeling activity. For the sector emissions this means SNAP sector 1-10. Biogenic/natural emissions are reported under sector 11.

For modeling purposes Germany is divided into Former Federal Republic of Germany and Former German Democratic Republic, while The Russian Federation is divided into Kaliningrad, Kola/Karelia, Rest of the Russian Federation and St. Petersburg/Novgorod-Pskov.

The geographical distribution of Main Pollutants is the same for the years 1985, 1995-1998 (the same base grid has been scaled according to sectors and totals for the emission year in question). A description of the  EMEP grid is posted at the  EMEP web site.

For the years 1980, 1990, 1999-2008, 2010, 2020, a new scaling routine, taking into account expert LPS data, has been used to create expert gridded sector emissions.

In 2005 gridded emissions in 0.5*0.5 deg has been made available. For details regarding the interpolation from the EMEP grid please refer to:  http://www.emep.int/grid/projinterpol.pdf.

Under  http://www.emep.int/grid/interpol.tar.gz you can find a Fortran library for the EMEP grid interpolation and coordinate conversion from the EMEP grid to longitude/latitude.

Start by pushing the button "Search for emissions used in models". A new browser window with the search assistant opens. Click you through this assistant and select one or more items from each of the list boxes described below.

Countries / Areas:

The field contains a list of all countries reporting to the UN-ECE. Also included are other areas where emission values are only expert estimates (ship emissions, natural marine emissions, North Africa and remaining Asian areas). Above the hyphens line (----) are four collective entries:  All, EU15, EU25, EU27 and SHIPS emissions.

Years:

Years for which EMEP Centres' model runs have been performed. Main Pollutants are available for 1980, 1985, 1990, 1995 - 2008, 2010 and 2020. PMs are available for 2000 - 2008, 2010 and 2020. HMs are available for 1990 - 2005 and 2007 - 2008, while POPs are available for 1970, 1975, 1980, 1985, 1990 - 2005 and 2008.

Projected emission data (2010 and 2020 Base Line scenarios) have kindly been provided by Centre for Integrated Assessment Modelling (CIAM) in June 2004.

Select output format:

Three selections are possible, depending on the type of data, non-gridded (Totals/Sectors) in either HTML or colon separated data format and gridded data, available in semi-colon separated format or graphic maps.

Pollutants:

    Pollutants are divided into four different lists:
  • Main Pollutants: The main acidifying and eutrophying pollutants.
  • PM: Particulate matter: PM10, PM2.5 and PMcoarse.
  • Heavy metals: As, Cd, Cr, Cu, Hg, Ni, Pb, Se and Zn.
  • POP: Persistent organic pollutants.

Sectors:

All sectors available refer to SNAP (Selected Nomenclature for reporting of Air Pollutants). The totals/sectors are the sum of the gridded data sectors S1-S10.

HTML Table (columns and rows):

Here you can choose which data you want to display in the columns and rows of the HTML table, depending on your needs. You can also preselect the result unit, which can be changed directly on the result page too.

Information & Footnotes:

If you wish to see the comments to emissions as used in EMEP models, please flag this item. An CEIP internal report code (for example CEIP2010) together with the date the emissions were imported to WebDab (for example 2009-04-07) will also appear.

If you choose to display HTML tables, the information will appear as footnotes at the bottom of the HTML tables. You can also hide and unhide this information directly in the result page.

If you prefer to see semi-colon separated files, the information will appear in the heading (separated out with hashes "#"), in front of each report the data is taken from.

The user should refer to the report code if having questions to a certain set of data.

Officially reported activity data

The officially reported activity data contain data officially submitted to EMEP by the Parties to the Convention on LRTAP.

Start by pushing the button "Search for reported activity data". A new browser window with the search assistant opens. Click you through this assistant and select one or more items from each of the list boxes described below.

Countries/Areas:

Contains a list of all countries reporting to the UN-ECE. Above the hyphens line (----) are four collective entries: ALL, EU15, EU25 and EU27 (i.e. EU15 plus Bulgaria, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Romania, Slovakia, Slovenia).

Years:

Activity data from 1990-2007 and projected activity data for 2010, 2015 and 2020 are available. Please be aware that reporting of activity data is only requested each fifth year, starting with reporting of activity data for year 1990. In addition projected activity data for 2010, 2015 and 2020 are requested.

Reported until:

Activity data has only been reported from 2003 to 2010, so these are the only options possible to choose.

Select output format:

Two selections are possible, either HTML table format or colon separated data format.

Activity Class:

Here you can choose the type of activity you wish to look at.

Sectors:

Only the sectors are listed which fits to your country, year and activity class selection. So in some cases there is no sector selection and in other cases you have to specify the sectors you want to retrieve from the database. If you choose no sector from the list, all available sectors are listed in the result.

In order to be able to select the correct sectors, the user is referred to the  NFR08 / Guidelines 2009 and  NFR02 / Guidelines 2002.

HTML Table (columns and rows):

Here you can design your own HTML table depending on your needs. 

Information & Footnotes:

If you wish to see the comments to officially reported emission data as provided by the Parties, please flag this item. An CEIP internal report code (for example U-AT09) together with the date the emission data were received by the UNECE (for example 2009-02-15) will also always appear.

If you choose to display HTML tables (see Type and Format below), the report code, date received and comments reported by the Parties, will appear as footnotes at the bottom of the HTML tables.

If you prefer to see semi-colon separated files, the report code (and date received), together with a report comment (Parties' comments) will appear in the heading (separated out with hashes (#)), in front of each report the data is taken from.

The user should refer to the report code if problems are discounted with a certain set of data.

Gridded emissions in Google Maps

With this service it is possible to visualize gridded emissions used in EMEP models in Google Maps or Google Earth. Start by pushing the button "Search for gridded emissions". A new browser window with the search assistant opens. You can select only one country because of performance issues and limits in the amount of displayable grid cells in Google Maps. Norway, The Russian Federation, Sea areas, North Africa, and volcanic emissions can also not be displayed in Google Maps. If you want to visualize this areas or more countries at once, please install  Google Earth on your computer, download the 'Grid (50km x 50km), KML file' which you can choose by selecting "Google Earth" and load this KML file to Google Earth, respectively open the KML file directly with Google Earth.

The cells are backed with 6 different colors (blue, green, yellow, orange, red and white) whereas white indicates areas with zero emissions. The distribution of this colors can be performed with three different methods: 'Linear distribution', 'Percentile distribution' and 'Manual distribution'. In all this methods the values are allocated to 5 categories.

Linear distribution

The value range from zero to the highest value is divided in 5 equal scopes, whereas an emission with the value of 0 to 20% of the highest value is indicated as blue, 21% to 40% is indicated as green, 41% to 60% is indicated as yellow, 61% to 80% is indicated as orange and an emission with a value above 80% of the highest value is indicated as red. Zero values are marked with white color.

Percentile distribution

A percentile (or centile) is the value of a variable below which a certain percent of observations fall. So the 20th percentile is the value (or score) below which 20 percent of the observations may be found.

The values of the selected area are sorted from the lowest to the highest value and then arranged in the following percentile steps:

P20 (20th percentile): Value range, where the first (lowest) 20% of the values can be found (blue)

P40 (40th percentile): Value range, where the second 20% of the values can be found (green)

P60 (60th percentile): Value range, where the third 20% of the values can be found (yellow)

P80 (80th percentile): Value range, where the fourth 20% of the values can be found (orange)

P100 (100th percentile): Value range, where the last (highest) 20% of the values can be found (red)

Zero values are not considered for the percentile range calculation. They are visualized as white cells.

Manual distribution

By choosing 'Manual' the color distribution is not done automatically, but has to be defined manually in the area between the 'Color distribution' drop down listbox and the 'Show Map' button. The input fields in this area have no effect to the other color distribution settings like 'Linear' and 'Percentile'.

Google Maps/Earth issues

In the column on the left side of the map you can see the definition of each cell with the EMEP coordinates and the emission value. On the top you can see the lowest and the highest emission value. The cells with the lowest and the highest values are additionally marked with a pin on the map. If you click on a cell in the left list a dialog appears beneath the appropriate cell with the coordinates and the emission value. You can also click on a cell directly in the map to activate this dialog.

If you use Google Earth the behavior is almost the same, but you need to press the CTRL button additionally to the mouse click if you want to activate the dialog with the grid information by clicking on a grid cell. In Google Earth it is also possible to display more than one grid layers at once. If you do this it may be difficult to distinguish between the different layers, especially which grid cell refers to which layer. Please be aware of that to avoid confusion.

In Google Maps/Earth you can zoom in and out with the mouse wheel and move the map by click and hold the left mouse button while you move the mouse to the required position.

LPS emissions in Google Maps

With this service it is possible to visualize Large Point Source emissions in Google Maps or Google Earth. The format "Google Maps" generate the LPS view in a browser frame using the Google Maps web service. The format "Google Earth" needs an installed Google Earth application installed at the computer you're running the query.

Once the map is generated you are able to click on a certain Large Point Source on the map to fade in detail information about the reported source like the year(s) of reporting, reported sectors and the corresponding pollutants including emission values.

Google Maps/Earth issues

In the column on the left side of the map you can see the listed Large Point Sources. If you click on a LPS in the left list a dialog appears beneath the appropriate facility in the map with detailed information. As mentioned above you can also click on a LPS directly in the map to activate this dialog. In Google Earth it is also possible to display more than one grid layers at once. If you do this it may be difficult to distinguish between the different layers. It's also possible that you accidentally visualize the same KML file several times in different layers, which results in the duplication of LPS in the map. Please be aware of that to avoid confusion.

In Google Maps/Earth you can zoom in and out with the mouse wheel and move the map by click and hold the left mouse button while you move the mouse to the required position.

 

Last update: 26.02.2014