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Steffen Tervooren [07-2014]:

Verification of vegetation in regard of greenvolume as potential for climate-adaption. Using the example of the state-capital Potsdam

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Reflecting expected Climate-heating (Potsdam about 2.5°C for 2050) and related extensive heat-periods (“tropical nights”), the search for adaptation is of interest. This includes health-challenging conditions. For Potsdam there are respective data available, addressing potentials for spatial- and landscape planning: detailed biotope mapping with connected data on green-volume (GV), soil sealing (VG) and other parameters like soiltypes (for 1992, 1998, 2004 und 2010). Specifically GV indicating adaptation (coolingpossibilities) and VG as „contra-indicator“ (heat-risk), have been analysed. Reflecting other studies, those data have been analysed to verify their relevance, using statistical, GIS- and geographical methods (e.g. regressions-analyses OLR / GWR). The target was to show relations between those data (variables to define indicators) and temperatures. Further similar, other study-results were to be verified and compared. To do this Landsat-data were processed to gain surface-temperatures. Thus were to be compared with the postulated indicators GV, VG and land-use (biotope-types). The relevance of the postulated indicators were shown, specifically using 2010-data. Similarities with other study-results could be verified. In addition, Potsdam-analytics were showing local specifics and influences, which need to be confirmed and implemented. VG and GVZ can be recommended to prepare for climate-adaptation and identify possibilities to do so. Results approve, that additional GV buffers temperatures, and rising VG most likely contributes to rising temperatures (method depending R²: from 0.65-0.85 and 0.9). Thus, they can contribute to climate-adaptation-measures. Using the data, starting points for calculations are presented, which can be used caring about other influences (specifically: land-use, location). It is advised, that presented calculationbasics shall be specified and complemented. Reflecting the results 1m³/m² additional GV contributes to reduce temperatures for about 0.3°C, 1% additional VG leads to 0.03°C surface-temperature-rise.

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