Dieser WMS (Web Map Service) enthält die Straßenabschnitte in Hamburg, auf denen nachts (22-6h) aus Lärmschutzgründen eine zulässige Höchstgeschwindigkeit von 30 km/h angeordnet ist. Die Abschnitte werden durch das Verkehrszeichen Nr. 274-30 (zulässige Höchstgeschwindigkeit 30 km/h) in Kombination mit dem Zusatzzeichen Nr. 1040-30 (22-6h) und dem Verkehrszeichen Nr. 1012-36 (Lärmschutz) angekündigt. Zur genaueren Beschreibung der Daten und Datenverantwortung nutzen Sie bitte den Verweis zur Datensatzbeschreibung.
Der WFS (Web Featrue Service) enthält die Straßenabschnitte in Hamburg, auf denen nachts (22-6h) aus Lärmschutzgründen eine zulässige Höchstgeschwindigkeit von 30 km/h angeordnet ist. Die Abschnitte werden durch das Verkehrszeichen Nr. 274-30 (zulässige Höchstgeschwindigkeit 30 km/h) in Kombination mit dem Zusatzzeichen Nr. 1040-30 (22-6h) und dem Verkehrszeichen Nr. 1012-36 (Lärmschutz) angekündigt. Zur genaueren Beschreibung der Daten und Datenverantwortung nutzen Sie bitte den Verweis zur Datensatzbeschreibung.
Dieser Datensatz wird nicht mehr gepflegt. Sie finden die Strecken mit Tempo 30 nachts nun im Datensatz "Zulässige Höchstgeschwindigkeiten Hamburg" im Layer Sonderregelungen zulässige Höchstgeschwindigkeiten.
Dieser Datensatz wird nicht mehr gepflegt. Sie finden die Tempo-30-Zonen nun im Datensatz "Zulässige Höchstgeschwindigkeiten Hamburg" im Layer Tempo-30-Zonen.
Das Projekt "RainCars" wird vom Umweltbundesamt gefördert und von Leibniz Universität Hannover, Institut für Kartographie und Geoinformatik durchgeführt. The objective of the proposed research is the investigation of a completely new approach for rainfall estimation using motorcars as moving rain gauges with windscreen wipers as sensors to detect precipitation. This idea would easily be technically feasible if the cars are provided with GPS and a small memory chip for recording the coordinates, car speed and wiper frequency. This initial research will explore theoretically the benefits of such an approach. For that valid relationships between wiper speed and rainfall rate (W-R-relationship) are assumed and derived from laboratory and field experiments. Different traffic models are developed to generate motorcars on roads in a river basin. Radar data are used as reference truth rainfall fields. Rainfall from these fields is sampled from the conventional rain gauge and dynamic car networks. Areal rainfall is calculated from these networks for different scales using geostatistical interpolation methods and compared against truth radar data. The car sensors can be considered as a geosensor network. It allows to measure and process information locally in a decentralized way and thus has benefits with respect to scalability, which is crucial when large areas have to be covered with large amounts of measurement units.
Das Projekt "Exzellenzcluster 80 (EXC): Ozean der Zukunft" wird vom Umweltbundesamt gefördert und von Universität Kiel, Geographisches Institut, Schwerpunkt Geoökologie, Regionale Umweltanalyse und -planung durchgeführt. Suspended sediment concentration (SSC) is one of the more important parameters surrounding the health of a coastal ecosystem (Fanning 1982; Olgilvie and Mitchell 1998; Simpson et al. 1998, Schratzberger et al. 2002). Shipping induced sediment resuspension may have numerous adverse impacts on coastal embayments and estuaries including disruption of navigation, increase in turbidity, and release of previously isolated contaminants back into the water column. This proposal outlines an investigation and quantification of the resuspension of sediments and their associated contaminants in the Venice Lagoon, Italy. A certain combination of different parameters including water elevation, vessel speed, draft, and gross tonnage can produce forced, shallow water waves. These waves create substantial resuspension events. We propose to calculate the threshold factors which produce these waves in addition to calculating sediment and contaminant concentration caused by these waves. This can be used as input for a critical economic impact assessment of nearshore shipping.
Das Projekt "Upwelling in the Atlantic sector of the Southern Ocean" wird vom Umweltbundesamt gefördert und von Universität Bremen, Institut für Umweltphysik, Abteilung Ozeanographie durchgeführt. Upwelling is an important process in setting the characteristic of the mixed layer. Upwelling also provides a pathway for gases, nutrients, and other compounds from the ocean's interior into the mixed layer and ultimately into the atmosphere. Since the upwelling velocities are small, they cannot be measured directly. Recently, Rhein et al. (2010) exploited the helium isotope disequilibria found in the equatorial eastern Atlantic to infer upwelling speeds, upwelling rates, and vertical heat fluxes between the mixed layer and the ocean's interior. The disequilibrium in the mixed layer is caused by upwelling of 3He-enriched water from the interior. The surplus 3He is introduced into the deep ocean by hydrothermal activities.A first survey of historical Helium isotope data in the Antarctic Circumpolar Current (ACC) and the Weddell Sea showed, that the mixed layer is also enriched with 3He, which in summer months is supplied by upwelling of water from below the mixed layer. Although the first estimates of upwelling velocities from the historical data set look promising, the present Helium data lack a sufficient resolution in the upper 200-300m to determine the horizontal and vertical He gradients, necessary for the compilation of the upwelling velocity and of the contribution of diapycnal mixing. Here we propose to take the historical He data, and a new dedicated He data sets to be taken in November 2010 - February 2011 during the POLARSTERN cruise ANT 27/2 and January- February 2012 during POLARSTERN cruise ANT28/3 to calculate upwelling speeds and -rates in the Weddell Sea and the ACC, as well as heat fluxes between the interior and the mixed layer.This proposal is part of the Cluster ' Eddies and Upwelling: Major Factors in the Carbon Budget ofthe Southern Ocean'
Das Projekt "Riblet-Surfaces for Improvement of Efficiency of Wind Turbines (Riblet4Wind)" wird vom Umweltbundesamt gefördert und von Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein durchgeführt. The main objective of Riblet4Wind is the transfer of a technology that has already demonstrated its capacity for increasing the energy efficiency in the aeronautics sector, to the wind energy industry. Application of functional coatings with riblet structure will improve the drag to lift ratio of rotor blades significantly. Wind tunnel experiments have proven the capability of this riblet-coating technology to increase the efficiency of wind turbines by up to 6%. This direct effect will allow gaining the same amount of electrical energy with smaller rotor blades. Indirect effects will increase the benefit to approximately more than 10%: - The improved drag to lift ratio will allow operation at lower wind speeds. The earlier cut-in of the WTG will improve the facility to balance in the electrical grid system. - The riblet structure improves the stall and turbulence behaviour of the rotor blades thus allowing also operation at higher wind speeds and/or operation in less optimum wind conditions, e.g. changing wind directions or gusts. - The improved drag to lift ratio will reveal design options due to changes of the design loads. - The riblet structure will also result in a substantial reduction of noise emissions. It is expected that the interaction of direct and indirect effects will contribute significantly to the targets of the European Wind Energy Technology Platform (TPWind) as declared in the new Strategic Research Agenda / Market Deployment Strategy (SRA / MDS) : a reduction of levelised costs of energy (LCoE) by 20% (onshore) respectively 50% (offshore) until 2028 (LCoE reference 2008). Beyond the focus of the topic H2020-LCE3-2014 the riblet-paint technology can also be applied on existing rotor blades, thus supporting retrofitting of existing wind turbines and maximising the benefit. In total Riblet4Wind aims at demonstrating the successful transfer of the riblet-coating technology and the semi-quantitative assessment of the direct and indirect effects.
Das Projekt "Baltic Atlas of Long-Term Inventory and Climatology (BALTIC)" wird vom Umweltbundesamt gefördert und von Leibniz-Institut für Ostseeforschung durchgeführt. The project 'Baltic Atlas of Long-Term Inventory and Climatology' (BALTIC) of the Baltic Sea Research Institute Warnemünde (IOW) was first announced on the meeting of the ICES Working Group on Marine Data Management in April 2000 in Hamburg and to the ICES Baltic Committee Meeting in September 2000. With the aim to support e.g. climate-related investigations, interdisciplinary studies, numerical modelling and regular monitoring, BALTIC is intended to provide the research community with a comprehensive 'climate atlas' for the Baltic Sea, inspired by famous paradigms like the COADS (Woodruff et al. 1987) or the Levitus (1982) global oceanographic data sets, going beyond the well-known data collections of Bock (1971), Lenz (1971) or Janssen et al. (1999) in terms of a significantly more extensive observational data basis involved, but remaining pristine and unbiased by refraining from the incorporation of any numerical model data. In the past years, a lot of historical CTD and bottle data had been reconstructed in the 'Historical Data Rescue' (HDR) framework of the marine research institutes around the Baltic Sea. Starting from the data already available in the data banks of IOW, the Federal Maritime and Hydrographic Agency (BSH), and the International Council for the Exploration of the Sea (ICES), the final goal is to build a collection of virtually all accessible oceanographic observation data of the Baltic Sea. In a preceding study, it had been found that indeed much more data than presently stored in the ICES database are available to be included into this project. In a first stage, the atlas is only based on oceanographic temperature/salinity/pressure and oxygen/hydrogen sulphide/nutrient measurements with highest possible spatial and temporal resolution. In subsequent future steps, the intended additional quantities will be those immediately derived thereof, like e.g. density, sound speed, entropy, enthalpy, pycnocline depth, or halocline depth. In further stages of development, data like density anomaly, alkalinity, biological abundances, or pollution may be added.
Das Projekt "MCEOC European Metrology Centre for Earth Observation and Climate: In-flight on-board transfer standards" wird vom Umweltbundesamt gefördert und von Physikalisch-Technische Bundesanstalt durchgeführt. The research addresses 'on-board standards' specifically tailored for in-flight calibration of air- and space-borne spectroradiometers. In this case study limb sounders have been chosen as an application area. The purpose is the development, characterization and application of a series of large aperture on-board radiance standards for the in-flight calibration of imaging IR spectroradiometers used to measure atmospheric radiance for climate variables such as temperature fields, cloud parameters, aerosols, water vapour, ozone and other trace species by e.g. limb sounding. The output of the research will enable significant improvements to be made to the calibration strategies of future IR hyperspectral imagers, and indeed other IR sensors and ensure that SI traceable uncertainties now demanded by the climate community can be achieved. The uncertainty requirement is highly demanding with the following standard uncertainties being the target: - uncertainty of absolute radiance measurement: u = 0.01 - uncertainty of relative radiance measurement (spatially and spectrally): u = 0.001 (0.0025 threshold). Air- and space-borne atmospheric observation systems are generally optimized to operate close to their physical sensitivity limits. This provides a limit to the required minimum time per measurement and consequently to their spatial resolution, as the observation target point moves with high speed through the field of view. Spatial resolution can therefore only be improved through use of multiple detectors, and the development of high performance mid-infrared detector arrays is a major advance for the next generation of instruments. The use of arrays, however, requires more accurate calibrations: As a rough approximation, in limb sounding the retrieved temperatures and trace species are proportional to the temperature difference between adjacent tangent heights. This has two consequences: 1) increased vertical resolution requires smaller uncertainties of the individual pixel measurements and 2) measurement uncertainties, which are anti-correlated between adjacent tangent altitudes, are strongly amplified. For a conventional instrument, measuring all tangent altitudes with the same single element detector, calibration uncertainties are correlated between different heights. For an array this depends very much on the quality of the overall calibration. Similarly, it is important to reduce spectrally uncorrelated uncertainties. For example at moderate spectral resolution a number of interfering trace species have to be retrieved simultaneously. Uncertainties uncorrelated between the various spectral windows degrade the accuracy of the retrieved trace species more strongly than errors correlated over a wide spectral range. usw.