Climate – Climate Adaptation Municipality of Bremen
Description
Climate Adaptation Strategy Data
° Bioclimatic situation (climate function map)
° Bioclimatic situation (settlement areas, green and open spaces)
° Climate comfort: Heat load
° Wind comfort/hurricane danger
Bioclimatic situation (climate function map):
The climate function map shows the functions and processes of the nocturnal air exchange for the urban area of Bremen (flow field, cold air ducts). For residential and commercial areas, it represents nightly overheating, based on the ground-level air temperature in an autochthonous summer night at 04:00 in the morning.
Bioclimatic situation of settlement areas (with cold air impact area)
• Settlement areas in the impact area of the cold air flow:
Settlement areas flowing through by nocturnal cold air.
The cold air input area characterises the ground-level outflow of the cold air from the green areas into the
adjacent development during an autochthonous summer night. As a cold air impact area, settlement and
Commercial areas within the urban area characterised by an above-average high
Cold air volume flow is flown through or is characterised by a wind speed of at least 0.2 m s-1.
• Bioclimatic situation of settlement areas:
Classification of the bioclimatic situation into four classes (very favorable, cheap, less favourable, unfavourable) in relation to the local agent based on the z-transformed PMV value (predicted mean vote).
Settlement areas can be subdivided into sufficiently ventilated areas and thus mostly climatically favorable settlement structures as well as climatic stress areas. The nocturnal overheating is based on the temperature difference from the green areas of the city. The heat island effect results as a deviation from this reference value and thus represents a more suitable characteristic for detecting the urban climate effect than absolute temperature values.
Bioclimatic importance of green and open spaces (cold air generation/production)
• Surfaces with very high cold air generation/production:
Green areas with very high cold air production are areas that show more than average cold air production in relation to the mean in the study room. They are marked by dot symbols. Selection criterion is a z-transformed cold air production rate greater than 1.
Cold air generation areas characterise green areas with a significantly above-average rate of cold air production and feed the cold air exchange areas or extend beyond them.
• Bioclimatic importance of green and open spaces:
Classification of the urban climate significance of green spaces into four classes (low, medium, high, very high).
The climate function map characterises green and open spaces with regard to their cold air supply capacity. Cold air-producing areas (cold air generation areas) include unsealed open spaces (e.g. meadows, pastures and arable land) as well as green areas characterised by loosened vegetation (e.g. park areas, small gardens and cemetery facilities) and forests. For the characterisation of this compensation, the cold air volume flow is drawn from adjacent surface area.
• Settlement areas with climate-relevant function:
In individual cases, cold air can also be passed over settlement areas with low building density, low construction heights and/or a high proportion of greenery. These settlement areas with very high cold air volume flows have a similar function within the settlement area and are designated with horizontal hatching.
• Air exchange:
Classification or evaluation of the cold air supply capacity of green areas in relation to the area means (z-transformed cold air volume flow).
Cold air exchange areas connect cold air generation areas (compensation rooms) and load areas (effect rooms) via (local or higher-level) cold air ducts or fulfil an important ventilation function and are therefore an elementary part of the air exchange.
Resources
| Name |
Format |
Description |
Link |
|
0 |
|
https://geodienste.bremen.de/wms_klima?SERVICE=WMS&REQUEST=GetCapabilities |