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  • KomPass: Article from 28.11.2023 | Last changed: 19.09.2024

    Cluster Water balance and water management

    The picture shows the tip of a level meter in a calm body of water.

    … of precipitation. Precipitation patterns are changing. Changes in the water cycle that have been observed already, have strong impacts on ecosystems, economy and … during summer half-years, there have been some very extreme flood events, when the long-term mean values for flood discharge were exceeded 8-fold at some of … the associated failure of drainage facilities and flood protection systems. Nevertheless, the certainty of this estimate is categorised as low. As far as sewer networks …

  • KomPass: Article from 28.11.2023 | Last changed: 20.09.2024

    Cluster Biological diversity

    In the foreground the picture shows a banded demoiselle which has landed on the blossom of a yellow waterbuttercup. The background of this picture is blurred.

    … of crops to produce healthy food. Another useful function of stable ecosystems is that they capture carbons from the atmosphere, binding and storing them long-term, … among species communities are disturbed (cf. Indicator FI-I-2 ). For example when the supply and demand of food are decoupled from breeding and hatching times, …

  • KomPass: Article from 28.11.2023 | Last changed: 18.11.2025

    Effects chain – Example presentation from the ‘tourism’ action field

    … Germany too, as shown by increasing mean air temperatures. The areal mean indicates that for the annual mean, air temperatures rose by 1.5 % from 1881 to 2022. In other … five decades, the temperature increase amounted to 0.38 °C per decade, which is more than three times higher than the value of 0.12 °C per decade averaged over the … destinations which have so far had a strong seasonal focus, are thus able to become less dependent on a core season tied to specific touristic activities and …

  • KomPass: Article from 28.11.2023 | Last changed: 18.11.2025

    KM-I-4: Coastal morphology – case study

    The picture shows a light-brown cliffscape near Ahrenshoop on the Baltic Sea coast. At the foot of the cliff, you can see the sea and the spray of a wave. In one coastal section, you can see loose material and rock fragments which have been shifted from the cliff top to the bottom of the cliff.

    … Coastal morphology – case study Climate change influences hydrodynamic factors that can affect coastal erosion. Data from aerial laser surveys of a representative … inland by just under 60 cm. Given the brevity of the time series and the years when no aerial surveys took place, it was not possible to carry out a statistical … surveyed varies every year by some metres. Consequently, it is likely that more or less strongly eroding areas of coast at either end of the coastal segment surveyed …

  • KomPass: Article from 28.11.2023 | Last changed: 12.12.2024

    FW-I-2: Incremental growth in timber

    The picture shows a stack of timber.

    … FW-I-2: Incremental growth in timber When the timber increment decreases, the volume of timber harvested decreases too. … for beech, oak and pine trees have declined distinctly since 2002. It is assumed that dry years and their aftereffects on forest ecosystems have a detrimental … in the atmosphere. This increase can, in principle, benefit productivity unless there are other factors restricting carbon absorption. Another important …

  • KomPass: Article from 28.11.2023 | Last changed: 12.12.2024

    LW-R-6: Agricultural irrigation

    The picture shows an arable field with young potato plants being irrigated by a drip irrigation unit.

    … sector can, among other things, ensure an increase in soil moisture by cultivating more drought-tolerant varieties and by employing adapted processes of (conserving) … whereas in 2015, the proportion had been lower, amounting to 58 %. The fact that in the region of Lüneburg the cultivation of crops requires such intensive … 2.3 % of total water abstraction, albeit already higher than in 2016 116 . Nevertheless, it is likely that the actual volume of abstracted water is underestimated. It …

  • KomPass: Article from 28.11.2023 | Last changed: 18.12.2024

    RO-R-5: Increase in settlement and transport areas

    The picture shows the construction of a new road. The partly finished road foundation is visible. In the foreground the foundation is still being completed whereas in the background it is already sealed. Half-way along the site a vibratory plate is standing. To the left of the new road, mounds of earth are visible - behind those a treeline. In the background, the roofs of a residential area are visible.

    … limit the information value of this figure, it can be stated with certainty that this increase in land use clearly exceeds national objectives. In other words, there is more left to do in order to protect land resources and their functionalities. … daily increase in the take-up of residential and transport terrain to be reduced to less than 30 ha by 2030. The BMUB’s Integrated Environmental Programme adopted in …

  • KomPass: Article from 28.11.2023 | Last changed: 18.11.2025

    Effects chain – Example presentation from the ‘building sector’ field

    … since 2015. Regarding Germany’s nationwide increase in hot days, it is to be noted that since the 1990s towns/cities have displayed a greater frequency of extreme … the heat stress experienced by the population in cities is in most cases distinctly more severe than the nationwide average. In most years towns / cities have … evaporate water through their leaves. Moreover, a verdure-covered building reflects less heat into the environment, as the irradiated energy is in part absorbed by the …

  • KomPass: Article from 28.11.2023 | Last changed: 18.12.2024

    RO-R-4: Priority and restricted areas reserved for special climate function

    Looking over the top of a woodland, the picture shows the skyline of Frankfurt am Main. Skyscrapers and the tv tower rise high above the landscape. In the background, the Taunus mountain range is visible.

    … may lead to a future increase in the occurrence of this phenomenon. It is a fact that particularly town spaces cool down more slowly in the evening or at night compared to the periphery; this can cause difficulties to the population, when high temperatures do not make it possible to have a good night’s rest. For …

  • KomPass: Article from 28.11.2023 | Last changed: 19.09.2024

    Cluster Woodland and forestry

    The picture shows a coniferous forest. The bark-free trunk of a damaged spruce tree is visible in the foreground. In the light-coloured wood of this tree the distinct frass traces of a bark beetle are clearly visible.

    … ecosystems are of particular importance. The Federal Forest Act therefore requires that the forest (including woodlands) is to be conserved, and all its functions are … terms of climate protection, as woodlands and forests are important carbon sinks. Whenever a vast expanse of forest dies or burns down, it becomes an additional … can be seen both in natural, unmanaged woodlands and in forests which are more or less subject to intensive silvicultural utilisation. It has now been 30 years during …

  • KomPass: Article from 28.11.2023 | Last changed: 18.11.2025

    FW-R-4 + 5: Utilisation of raw timber and timber construction quota

    … find ways for the material utilisation of timber wherever possible, and preferably domestically. Given that deciduous timber is still clearly used predominantly for energy generation, the … to be opened up, especially in respect of non-residential buildings. Owing to its more favourable properties, it is predominantly coniferous timber that is used in …

  • KomPass: Article from 28.11.2023 | Last changed: 18.11.2025

    FI-I-3: Occurrence of thermophilic species in inland waters – case study

    The picture shows two men in waterproof working clothes standing in a small boat on Lake Constance. One of them is holding a fishing net. He seems to be pulling it out of the water. In the background, the lakeshore and a settlement are visible.

    … which has increased drastically in the course of the past two decades. Nevertheless, there is an increasing number of research projects looking into the impacts of … in respect of changes in aquaculture. As for the future, experts foresee however, that climate change will have increasing influence on fish stocks, yield conditions … where temperatures are low, are likely to suffer restrictions to their habitats when temperatures rise 89 . Using the example of Lake Constance for which longterm …