Denmark's Fourth National Communication on Climate Change Annex H Denmark's report on systematic climate observations for the global climate observing system (GCOS)Denmark's Report On Systematic Observations For The Global Climate Observing System (Gcos) In Connection With The Fourth National Communication Under The United Nations Framework Convention On Climate Change (UNFCCC) Source: The Meteorological Institute and The National Environmental Research Institute The annual mean temperature, Denmark, 1873-2004 1 INTRODUCTION 2 METEOROLOGICAL AND ATMOSPHERIC OBSERVATIONS 3 OCEANOGRAPHIC OBSERVATIONS9 5 SPACE-BASED OBSERVATIONS 6 ACTIVITIES IN DEVELOPING COUNTRIES RELATING TO OBSERVATIONS 1 IntroductionThis report has been prepared to give a status on the Danish contribution to the systematic climate observations in the Global Climate Observing System (GCOS). The report is part of the Fourth National Communication to the Conference of the Parties under the United Nations Framework Convention on Climate Change (UNFCCC). Climate research and the generation of climate-related observations are carried out by various government departments in order for them to meet their responsibilities. Currently, no national plan exists for the whole area of climate research and observations. 1.1 SYSTEMATIC OBSERVATIONSA number of agencies in Denmark engage in the systematic observation of elements of the climate system. Invariably the capture, quality control and archiving of such data are designed to meet the integrated needs of these agencies, deriving from their overall missions. Typically the drivers for long-term systematic observation of environmental or ecological characteristics arise from an operational, regulatory or research need. Examples of the former are to be found in the capture of meteorological data for predictive and statistical services by the Danish Meteorological Institute (DMI). The resulting observation programmes tend to be long term, but the resulting individual data may be seen as perishable and focus might not always be on maintaining stability and reliability in the records. The general need for systematic and reliable time series is increasingly being understood in the scientific community and incorporated in the collection and data processing procedures. 1.2 DATA AVAILABILITYIn this report relevant climate observations for Denmark, Greenland and the Faroe Islands will be described. In general the data are available from the institutions operating the observing station / collecting the data, but many can also be found on the web, for instance www.dmi.dk. Where data such as contributions to GCOS are submitted to the appropriate data centres, they are also available from these centres. Additionally, all meteorological data and products that are produced by WMO Members (national meteorological services) to the WMO programmes such as the WWW are available under the terms of WMO Resolution 40 (WMO policy and practice for the exchange of meteorological and related data and products including guidelines on relationships in commercial meteorological activities). Such data are freely available without charge (i.e. at no other cost than the cost of reproduction and delivery, without charge for the data and products themselves and with no condition on their use) Similarly hydrological data and products are covered under WMO Resolution 25. Further the IOC are expected to adopt a data policy which provides for free and open access to data that are collected, produced or exchanged as part of oceanographic programmes conducted in association with the IOC. 2 Meteorological and atmospheric observations2.1 CONTRIBUTING TO GCOSDenmark participates fully in the GCOS Surface Network (GSN) and the GCOS Upper Air Network (GUAN), and in the Global Ozone Observing System (GO3OS) as part of the Global Atmospheric Watch (GAW). TABLE H-1. DANISH PARTICIPATION IN THE GLOBAL ATMOSPHERIC OBSERVING SYSTEM
1 Denmark participates in GAW's GO3OS 2.2 GCOS SURFACE NETWORK / GSN STATIONSThe seven designated GSN stations in Denmark, Greenland and on the Faroe Islands are all run by DMI and include:
All of these stations currently meet the GCOS standard for surface observation. 2.3 GCOS UPPER AIR NETWORK / GUAN STATIONSOnly one GUAN station is designated for Denmark, Greenland and the Faroe Islands and it is situated in Narsarsuaq, Greenland. The station is run by DMI and is operated in accordance with the GCOS standard. A survey of the station's 2004 results shows that 88% of the soundings reached a pressure of 30 hPa. 2.4 GCOS GLOBAL ATMOSPHERIC WATCH / GAW STATIONSAs part of the GAW programme, Denmark contributes to the Global Ozone Observing System (GO3OS) with three stations in Greenland and one in Denmark. The stations in Kangerlussuaq (Greenland) and Copenhagen (Denmark) are equipped with Brewer spectrometers, the station in Pituffik (Greenland) is equipped with a Dobson and a SAOZ spectrometer, and the station in Illoqqortoormiut (Greenland) is equipped with a SAOZ spectrometer. The spectrometer in Illoqqortoormiut is operated by Service d'Aeronomie (France) in cooperation with DMI while all other spectrometers are operated by DMI. All data are available from DMI. The stations in Greenland are primary and secondary stations in the Network for the Detection of Stratospheric Change (NDSC) that is supported by the International Ozone Commission, the UNEP and the WMO. 2.5 OTHER NATIONAL METEOROLOGICAL AND ATMOSPHERIC OBSERVATIONS:2.5.1 Climatological/meteorological surface stationsDMI operates and receives data from a network of approximately 100 automatic meteorological stations in Denmark, Greenland and on the Faroe Islands. Measurements are made in accordance with the WMO recommendations. FIGURE H-1: DMI'S NETWORK OF WEATHER STATIONS IN DENMARK As of 2001 a special dedicated network of (manual) stations for climatological observations has been discontinued, due to the convergence between the different network technologies. The objectives behind this decision are to eliminate human errors, to benefit from potential savings due to this rationalisation, and to reach a higher observation frequency. Climatological data are now obtained from the automatic network described above. FIGURE H-2: DMI'S NETWORK OF WEATHER STATIONS IN GREENLAND Climatological data are collected to define the climate in Denmark, Greenland and on the Faroe Islands and to create a national database for a wide range of enquiries and research activities. Climatological work mostly consists of preparing annual and monthly statistics, including calculation of averages, percentiles and standard deviations. FIGURE H-3: DMI’S NETWORK OF WEATHER STATIONS ON THE FAROE ISLANDS Substantial recorded data are needed to establish reliable averages and trends. In 2004 the daily inflow of data from Denmark, Greenland and the Faroe Islands was 100,000 observations, and the central database at DMI currently contains more than 300,000,000 observations. Some of the recorded data are from as early as 1872. A monthly summary is prepared for the three stations in Denmark, one on the Faroe Islands and eight in Greenland using the CLIMAT format. These data are routinely submitted via the GTS. 2.5.2 Precipitation observation networks (stations and radar)For national purposes, more data concerning precipitation is needed than can be provided from the overall surface climatological and meteorological network described above. In Denmark the precipitation observation network consists of approximately 575 stations. Roughly 100 of these provide data on precipitation intensity on an ongoing basis. They are jointly operated by DMI and The Water Pollution Committee of the Society of Danish Engineers (Spildevandskomitéen - SVK). The remaining 500 stations collect daily values of precipitation, and data from approximately 100 of these are electronically transmitted to DMI on a daily basis. FIGRUE H-4: DMI’S NETWORK OF AUTOMATIC PRECIPITATION INTENSITY STATIONS (DETAILED FOR COPENHAGEN) On the Faroe Islands a network of 22 precipitation station observe daily precipitation. FIGURE H-5: DMI’S NETWORK OF MANUAL PRECIPITATION STATIONS Information on precipitation can also be obtained from weather radar data. In Denmark, DMI runs a network of three weather radars which provides 100% coverage of Danish land areas and coastal marine areas. The network's geographical coverage is unsurpassed, and hence provides detailed information about precipitation on national and local scales. By calibrating radar data against point measurements of precipitation the latest scientific results show a high absolute accuracy. The present radar network has a data frequency of 6 pictures per hour, and a spatial resolution of 2 km x 2 km. 2.5.3 Surface radiation and sunshine observation networkDMI runs a network of 23 sunshine observation stations in Denmark, six in Greenland, and one on the Faroe Islands. Radiation is measured as 10- minute mean values of global radiation at the DMI operated stations and the number of hours of sunshine is then calculated based on the global radiation. 2.5.4 Solar ultraviolet (UV) radiation and stratospheric ozone stationsSolar Ultraviolet (UV) radiation at different wavelengths is measured by DMI at two stations in Greenland, namely Pittuffik and Kangerlussuaq. In addition to the GO3OS described above, DMI performs weekly ozone soundings at Illoqqortoormiut as well as sporadic ozone soundings at Pituffik during the winter months. 2.5.5 Upper air strata measurements - Radio sounding observationsDMI runs radio sounding stations at the following seven locations: Copenhagen (Denmark), Tórshavn (the Faroe Islands), Danmarkshavn, Illoqqortoormiit, Tasiilaq, Narsarsuaq and Aasiaat (Greenland). Two soundings are made every day at these stations. A monthly summary (CLIMAT TEMP) from all seven radio sounding stations is prepared and transmitted routinely on the GTS. 2.5.6 Ice observationsDMI is responsible for the systematic surveillance of sea ice conditions in the Greenland waters. Observations concerning ice conditions have been collected for approximately 125 years and an extensive volume of data is available in a graphic format as monthly summaries, ice maps etc. Since 1959 special emphasis has been on the waters south of Cape Farewell (the southern tip of Greenland) in order to improve navigation safety in what is an important navigation area. Ice maps containing detailed information on the relevant ice conditions are prepared several times a week. The most recent maps are available in vector graphic format. Since 2000 weekly summaries of the ice conditions for all Greenland waters have been prepared. These summaries, which are based on satellite data, are generated semi-automatically and are primarily intended for climatological analyses as the energy radiation from the sea is highly dependent on whether it is covered with ice or not. 2.5.7 Climatological data setsOver the years, DMI has established a number of very long climatological series with differing periods of information representing Denmark, Greenland and the Faroe Islands. The long daily time series include: precipitation, temperature, atmospheric pressure and cloud cover for a number of Danish locations, 1874-2004 as well as precipitation and temperatures for two Greenland Stations 1874-2004 (DMI Technical Report no. 05-04). The long monthly time series include: temperatures, precipitation, atmospheric pressure, cloud cover and snow for stations in Denmark, Greenland and on the Faroe Islands (DMI Technical Report 05-05). The long annual time series include: temperature for a number of stations in Denmark, Greenland and on the Faroe Islands (1873-2004), as well as temperatures, precipitation, hours of sunshine and cloud cover given as national averages for Denmark (DMI Technical Report 05-06). 2.5.8 Air quality monitoringAir pollution is automatically monitored in both urban and rural areas across Denmark. This monitoring network is operated by NERI and measures a wide range of pollutants:
Furthermore, at a number of NERI stations deposition of air pollution via precipitation is monitored. Figure 6 shows the types and distribution of air quality monitoring stations across Denmark, and in Table 2 the measurements taken at the different stations are listed. Current monitoring data from air monitoring stations, reports from previous quarters as well as development trends for the air quality in Denmark can be found on NERI's website (www.dmu.dk). Prognoses of air pollution in Denmark for the next three days as well as detailed prognoses for Copenhagen and Ålborg can also be found here. In addition to the ozone measurements mentioned above, DMI operates an ozone monitoring station at Jægersborg in a suburban environment near Copenhagen as well as a station in Store Jyndevad in a rural area in the south of Jutland. Real-time hourly data are presented on DMI's website (http://www.dmi.dk). Data with a time resolution of 10 minutes are also available from DMI. FIGURE H-6: AIR QUALITY MONITORING STATIONS IN DENMARK 3 Oceanographic observations3.1 CONTRIBUTING TO GCOSOceanographic observations for GCOS are based on the GOOS climate module for the open ocean, which comprises the following programmes: drifting and moored buoy programmes managed by the DBCP (Data Buoy Co-operation Panel), the Ship of Opportunity Programme (SOOP), the Argo array of profiling floats, the Global Sea Level Observing System (GLOSS), the Voluntary Observing Ships Programme (VOS) and the Automated Shipboard Aerological Programme (ASAP). Denmark participates in the VOS, GLOSS and ASAP programmes as summarised in table 3 below. 3.2 VOLUNTARY OBSERVING SHIPS/VOSVOS is an international scheme developed approximately 150 years ago by which special ocean-going ships are recruited to collect and report meteorological observations. Contributions made by VOS ships to the Global Observing System (GOS) of the World Weather Watch (WWW) are extremely important. Moreover, these observations increasingly contribute to global climate studies through the VOS Climate Project VOSClim. VOS observations are disseminated via GTS and are archived by many national meteorological services. TABLE H-2: MEASUREMENTS TAKEN AT THE DIFFERENT STATIONS TABLE H-3: PARTICIPATION IN THE GLOBAL OCEANOGRAPHIC OBSERVATION SYSTEMS Click here to see Table H-2 and Table H-3 At the end of 2004, the Danish fleet of voluntary observing ships consisted of 47 ships. DMI has the operational and technical responsibility for the observations, which are reported from the ships every third hour. 3.3 TIDE GAUGE/GLOSSGLOSS is an international programme coordinated by IOC for the establishment of global and regional advanced sea level networks to be used in climate research, oceanographic research as well as research concerning the sea level in coastal areas. The main component of GLOSS is the Global Core Network (GCN) of 287 sea level stations around the world that monitor long-term climate change and oceanographic sea level variations. There is a GLOSS station in Tórshavn (Faroe Islands), which is operated by DMI. The relevant mean values from the stations are transmitted to the Permanent Service for Mean Sea Level (PSMSL) hosted by the Proudman Oceanographic Laboratory in the UK. The PSMSL, established in 1933, is a global database containing information on long-term sea level variations based on tide gauges. Information on monthly and annual mean sea levels is reported to PMSLS from 15 stations in Denmark and one on the Faroe Islands. 3.4 AUTOMATIC SHIPBOARD AEROLOGICAL PROGRAMME (ASAP)The ASAP in its present form began in the mid1980s. The programme's objective is to record profile data from the upper air strata in ocean areas using automated sounding systems carried on board merchant ships plying regular ocean routes. Several national meteorological services operate ASAP units and the collected data are made available in real time via GTS. ASAP data are archived alongside other radio sounding data by many national meteorological services. ASAP is an important contribution to both the WWW and GCOS. Today most of the soundings are from the North Atlantic and north-west Pacific, but the programme is expanding to other ocean basins through a new, co-operative World-wide Recurring ASAP Project (WRAP). Denmark operates two ASAP units mounted on ships plying fixed routes from Denmark to Greenland. The European meteorological cooperation EUMETNET started a special E-ASAP programme in December 2000. The programme aims at joint operation of the ASAP programmes under the European meteorological institutes. 3.5 OTHER NATIONAL OCEANOGRAPHIC AND MARITIME OBSERVATIONS3.5.1 Sea temperaturesDenmark has a network for the collection of sea temperatures at 13 coastal stations around Denmark. The stations are operated by DMI, the Royal Danish Administration for Navigation and Hydrography, the Danish Coastal Authority, and local authorities respectively. Data are available from each of the responsible bodies. Furthermore, sea surface temperatures are monitored using satellites, and DMI prepares daily maps for the North Sea and Baltic Sea areas. 3.5.2 National tide gauge networkIn Denmark an extensive national network of tide gauges are operated jointly by DMI, the Royal Danish Administration for Navigation and Hydrography, local authorities and the Danish Coastal Authority. The network consists of 81 automatic stations. In Greenland a tide gauge station is operated by National Survey and Cadastre (KMS). On the Faroe Islands one station is operated in Tórshavn by DMI. Data are available from the responsible bodies. 3.5.3 Hydrographic and marine surveysThe National Environmental Research Institute has the overall responsibility for surveillance of the Danish waters. Surveillance of fjords and coastal waters is carried our by the regional authorities approximately 24-47 times a year, while NERI is responsible for mapping the open waters on five expeditions per year where the objective is to:
All of the surveys are part of the Danish nationwide monitoring programme NOVANA, and many of the surveys are part of the HELCOM monitoring programme for the Baltic Sea area as well as the OSPARCOM monitoring programme for Kattegat, Skagerrak and the North Sea. All marine NOVANA data (regional and state) are collected annually in the national marine database, MADS, by NERI, and can be downloaded from the internet at: http://mads.dmu.dk. The Danish Institute for Fisheries Research carries out yearly surveys in Danish waters, primarily in the North Sea and the Baltic Sea. Relevant oceanographic parameters are measured and recorded for these areas. Furthermore, DMI is involved in the following projects: - Measurements of water transports across the Greenland-Scotland Ridge
- Monitoring of the oceanographic conditions along West Greenland
- Monitoring of the oceanographic conditions around the Faroe Islands
4 Terrestrial observationsMonitoring snow cover, sea ice and surface radiation is a natural part of DMI's activities. DMI does not carry out any additional terrestrial observations that can be related to climate change. However, some climate-related research includes monitoring the effect of climate terrestrial conditions. 5 Space-based observationsDenmark contributes to space-based observations through its membership of the European Space Agency ESA (a partnership of 15 European Member States, with Canada affiliated), EUMETSAT (the European Organisation for the Exploitation of Meteorological Satellites, a partnership of 18 European Member States and eight cooperating States), and by the use of small national satellites. This report, that focuses on Denmark's specific needs and efforts, does not as such include detailed information on platforms and sensors. The Danish strategy for earth observations (EO) is largely delivered through participation in international programmes and to some extent through national programmes such as the Ørsted satellite. The Danish space activities are not coordinated by one central institution. The Ministry of Science, Technology and Innovation represents Denmark in ESA, whereas the responsibility for the meteorological observation aspects (EUMETSAT) lies with the Ministry of Transport and Energy. The actual activities are carried out by several organisations, such as DMI, the Technical University of Denmark, the Danish Space Research Institute and of course private industry. 5.1 ESA AND EUMETSAT SATELLITES AND PROGRAMMESThe ESA platforms that are either currently in operation or are due for launch before the end of 2005, and the projects in which Denmark participates, include:
DMI represents Denmark in EUMETSAT, which currently has the following programmes:
As part of its distributed application ground segment EUMETSAT has a network of Satellite Application Facilities (SAFs) that are specialised development and processing centres (see http://www.eumetsat.de for details). These centres utilise the specific expertise available at the national meteorological institutes in EUMETSAT's Member States, and complement EUMETSAT's own production of standard meteorological products derived from satellite data. Seven SAF projects are undergoing development, focusing on the following applications:
A number of these are relevant regarding of GCOS monitoring. DMI hosts the GRAS meteorology SAF and also contributes to the ocean and sea ice SAF as well as the ozone monitoring SAF. 5.2 GPS DATA FROM THE ØRSTED, SAC-C AND CHAMP SATELLITESMeasurement of the GPS radio occultations is a new and very promising technique for both numerical weather prediction and for monitoring and identifying climate change processes. This was first demonstrated by the American GPS/MET mission. The research satellites Ørsted, SAC-C and CHAMP are all equipped with high precision GPS receivers that are required to perform this kind of profile measurements in the atmosphere. GPS data from the Danish Ørsted satellite, launched in 1999, has been used in the EU project CLIMAP (CLImate and environment Monitoring with GPS based Atmospheric Profiling) to study the impact on numerical weather prediction. As these data need no calibration, they may prove very valuable for climate monitoring purposes, as several data sets and model forecasts can be combined. The primary objective of the CLIMAP project was to demonstrate the value of the GPS technique in relation to Numerical Weather Predictions (NWP). The project includes data from GPS reception at ground level as well as from Low Earth Orbiting (LEO) satellites. An end-to-end chain for processing satellite-based GPS radio occultation data was developed: From GPS signal reception to assimilation into the NWP models. The chain included operational reception of tracking data from the Ørsted satellite with associated level-0 processing and archiving (has been developed and is operated by the Danish company TERMA A/ S and DMI). This concept will also be used by DMI in connection with the new GPS data received from the German CHAMP and the Argentine SACC satellite. 6 Activities in developing countries relating to observationsFrom 1997 to 2004 DMI participated in a project in cooperation with the Meteorological Services Department of Ghana (MSD). The objective of the project was primarily to re-establish a meteorological observation network in Ghana and thereby ensure the collection of data. At the same time, the project aimed at improving communication and utilisation of the collected data. At the time of finalisation of the project, MSD had a successful observation network of approximately 300 stations that record the basic meteorological parameters. The DMI/Danish Climate Centre coordinated the project Application of seasonal climate forecasts for improved management of crops in western Africa. The objective was to explore the possibilities of adjusting crop management practice for a selected agricultural crop (groundnuts) in Ghana, western Africa, using the best available seasonal climate forecasts. The project was funded by the Danish Council for Development Research (Rådet for Ulandsforskning -RUF). 7 List of acronyms
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