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Severity distribution of existing dwellings (year 2022, 2050, and 2100) in comparison to outdoor conditions Source: Author 2024
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While climate change represents a universal threat to the sustainable growth efforts globally, its impacts are not experienced equally with marginalised population groups, especially informal settlement residents, being highly exposed to its negative effects. Despite being widely acknowledged that the built environment is a major driver of inhabita...
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Context 1
... addition, the simulated indoor conditions reveal prolonged periods of concerning heat stress exposure. When comparing the two dwellings, D2 spends a higher cumulative time in excessive temperatures categorised as HUM-3 to HUM-4 heat stress conditions, with 17% for D2 versus only 1% for D1 during the summer period (Tables 7 and 8; Figure 7). The simulations further indicate that heat stress exposure within the dwellings is significantly greater than in the surrounding outdoor context, being 1.6 times (D1) to 2.2 times (D2) more intense under HUM-2 (some discomfort) to HUM-4 (danger) conditions (Tables 7 and 8). ...
Context 2
... the unmodified Dwelling D1, 57% of the summer period is spent below the heat stress caution threshold (humidex <29 °C) ( Table 7; Figure 7). The highest severity category experienced in this dwelling during the same period is HUM-3 (great discomfort) (Humidex: 40°C-46°C), occurring only 3% of the time (Table 7). ...
Context 3
... contrast, Dwelling D2 experiences a wider distribution across severity categories during the summer period, with a significant increase in time spent at higher severity levels. Approximately 17% of the time is spent in HUM-3 (great discomfort) to HUM-4 (danger) conditions, with notably 4% of the time in the danger category (Table 8; Figure 7). Residents of D2 are thus at a heightened risk of heat stress exposure, which may lead to greater health complications related to heat stress. ...
Context 4
... outdoor conditions, the percentage of time spent at 'HUM-0' (Humidex <20˚C) declines sharply from 2022 to 2100, disappearing entirely during summer months in indoor environments by 2100 (see Tables 9 and 10; Figure 7). Conversely, the time spent in more severe classifications (HUM-3 to HUM-5) significantly increases under projected climate conditions, rising from 1% to 15% in Dwellings D1 and from 17% to 33% in D2. ...
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