Wavelength-dependent solar heating of harp seals (Pagophilus groenlandicus)

Solar Thermal Textiles for On-Body Radiative Energy Collection Inspired by Polar Animals

“…We confirm the importance of optical structure by reversing our absorber–transmitter stack, i.e., facing the dark-colored PEDOT surface outward, which significantly reduces relative performance (+7.1 °C versus +9.9 °C) (Figure S3). This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. ,, …”

“…(Figure S2) This is in agreement with counterintuitive observations that darker colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light colored pelts. (9)(10)(11) Modeling textile thermoregulation under illumination. While previous work in radiative heating textiles has studied the impact of IR surface properties, here we study the combined impact of IR and visible optical properties on personal heating under moderate light intensity.…”

“…This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. 6,7,11 2.3. Modeling Textile Thermoregulation under Illumination.…”

“…There is also convincing evidence that, under the extremely high solar insolation of the polar environment (8), certain cold-adapted animals use low optical density (lightly colored) insulating features to achieve a biological, on-body greenhouse effect. (9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e.…”

“…(9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e. up to 10 times the basal metabolic heat production of common endotherms.…”

Solar Thermal Textiles for On-Body Radiative Energy Collection Inspired by Polar Animals

“…We confirm the importance of optical structure by reversing our absorber–transmitter stack, i.e., facing the dark-colored PEDOT surface outward, which significantly reduces relative performance (+7.1 °C versus +9.9 °C) (Figure S3). This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. ,, …”

“…(Figure S2) This is in agreement with counterintuitive observations that darker colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light colored pelts. (9)(10)(11) Modeling textile thermoregulation under illumination. While previous work in radiative heating textiles has studied the impact of IR surface properties, here we study the combined impact of IR and visible optical properties on personal heating under moderate light intensity.…”

“…This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. 6,7,11 2.3. Modeling Textile Thermoregulation under Illumination.…”

“…There is also convincing evidence that, under the extremely high solar insolation of the polar environment (8), certain cold-adapted animals use low optical density (lightly colored) insulating features to achieve a biological, on-body greenhouse effect. (9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e.…”

“…(9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e. up to 10 times the basal metabolic heat production of common endotherms.…”

Solar Thermal Textiles for On-Body Radiative Energy Collection Inspired by Polar Animals

“…We confirm the importance of optical structure by reversing our absorber–transmitter stack, i.e., facing the dark-colored PEDOT surface outward, which significantly reduces relative performance (+7.1 °C versus +9.9 °C) (Figure S3). This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. ,, …”

“…(Figure S2) This is in agreement with counterintuitive observations that darker colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light colored pelts. (9)(10)(11) Modeling textile thermoregulation under illumination. While previous work in radiative heating textiles has studied the impact of IR surface properties, here we study the combined impact of IR and visible optical properties on personal heating under moderate light intensity.…”

“…This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. 6,7,11 2.3. Modeling Textile Thermoregulation under Illumination.…”

“…There is also convincing evidence that, under the extremely high solar insolation of the polar environment (8), certain cold-adapted animals use low optical density (lightly colored) insulating features to achieve a biological, on-body greenhouse effect. (9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e.…”

“…(9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e. up to 10 times the basal metabolic heat production of common endotherms.…”

Solar Thermal Textiles for On-Body Radiative Energy Collection Inspired by Polar Animals

“…We confirm the importance of optical structure by reversing our absorber–transmitter stack, i.e., facing the dark-colored PEDOT surface outward, which significantly reduces relative performance (+7.1 °C versus +9.9 °C) (Figure S3). This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. ,, …”

“…(Figure S2) This is in agreement with counterintuitive observations that darker colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light colored pelts. (9)(10)(11) Modeling textile thermoregulation under illumination. While previous work in radiative heating textiles has studied the impact of IR surface properties, here we study the combined impact of IR and visible optical properties on personal heating under moderate light intensity.…”

“…This agrees with counterintuitive observations that darker-colored pelt features, due to inhibited light transmission, may achieve less solar utilization than light-colored pelts. 6,7,11 2.3. Modeling Textile Thermoregulation under Illumination.…”

“…There is also convincing evidence that, under the extremely high solar insolation of the polar environment (8), certain cold-adapted animals use low optical density (lightly colored) insulating features to achieve a biological, on-body greenhouse effect. (9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e.…”

“…(9)(10)(11) Compared to darkly colored surface features, for example, the light-colored surfaces of the polar bear and harp seal transmit signi cantly more radiation toward melanized skin, trapping heat with solar utilization factors ranging from 10-50%. (9,10) Such solar harvesting supports thermal homeostasis by accessing a huge potential energy source with magnitudes exceeding 1000 W/m 2 , i.e. up to 10 times the basal metabolic heat production of common endotherms.…”