Near-surface air temperature retrieval from satellite images and influence by wetlands in urban region

Hou, Peng; Chen, Yunhao; Wang, Qiao; Cao, Guangchao; Jiang, Weiguo; Li, Jing

doi:10.1007/s00704-012-0629-7

Cited by 46 publications

(28 citation statements)

References 34 publications

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“…A consistent comparison between satellite-based and in situ-based studies can be challenging because they may report different variables. Because of the heterogeneous emissivity of the land surface (Jin and Dickinson, 2010), satellite-based data sets usually report changes in radiometric surface temperature, which represents a combination of temperature at the top of the vegetation and the soil (through gaps in the canopy). Satellite-based direct estimates of air temperature (based on the intensity of upwelling microwave radiation from atmospheric oxygen) are available only for broad vertical layers of the atmosphere and at a coarse spatial scale (Von Engeln and Bühler, 2002).…”

Section: Discussionmentioning

confidence: 99%

Different response of surface temperature and air temperature to deforestation in climate models

et al. 2019

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Abstract. When quantifying temperature changes induced by deforestation (e.g., cooling in high latitudes, warming in low latitudes), satellite data, in situ observations, and climate models differ concerning the height at which the temperature is typically measured/simulated. In this study the effects of deforestation on surface temperature, near-surface air temperature, and lower atmospheric temperature are compared by analyzing the biogeophysical temperature effects of large-scale deforestation in the Max Planck Institute Earth System Model (MPI-ESM) separately for local effects (which are only apparent at the location of deforestation) and nonlocal effects (which are also apparent elsewhere). While the nonlocal effects (cooling in most regions) influence the temperature of the surface and lowest atmospheric layer equally, the local effects (warming in the tropics but a cooling in the higher latitudes) mainly affect the temperature of the surface. In agreement with observation-based studies, the local effects on surface and near-surface air temperature respond differently in the MPI-ESM, both concerning the magnitude of local temperature changes and the latitude at which the local deforestation effects turn from a cooling to a warming (at 45–55∘ N for surface temperature and around 35∘ N for near-surface air temperature). Subsequently, our single-model results are compared to model data from multiple climate models from the Climate Model Intercomparison Project (CMIP5). This inter-model comparison shows that in the northern midlatitudes, both concerning the summer warming and winter cooling, near-surface air temperature is affected by the local effects only about half as strongly as surface temperature. This study shows that the choice of temperature variable has a considerable effect on the observed and simulated temperature change. Studies about the biogeophysical effects of deforestation must carefully choose which temperature to consider.

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Section: Discussionmentioning

confidence: 99%

Different response of surface temperature and air temperature to deforestation in climate models

et al. 2019

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“…On the micro scale, water is considered to be pretty stable under the present weather conditions in comparison to lawn or concrete (Huang et al, 2008a) due to its larger thermal capacity (Hou et al, 2013), but other condition also do influence the efficiency of urban water. Temperature distribution is heavily related to presenting radiation condition.…”

Section: The Role Of Urban Design On Water Body's Effectsmentioning

confidence: 99%

“…Inside leeward direction of around 127,000 m2 pond located in Fukuoka, Japan Ishshii et al (1991) discovered an impact on surrounding regions around the distance of 400m. In one study which was done later, Hou et al (2013) understood that there is a 300 m milestone up to the amount that the wetlands can be influential. Murakawa et al (1991) understood that over streets that are around 100 meters wide and face a river, horizontal cooling moves up to 400 m in.…”

Section: The Role Of Urban Design On Water Body's Effectsmentioning

confidence: 99%

Water Bodies an Urban Microclimate: A Review

Manteghi¹,

Limit²,

Remaz³

2015

MAS

129

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In urban areas, water bodies have a positive effect upon microclimate of the surroundings with the relative cooling impact it has on evaporative procedure. Hence, evaporative cooling might be one of the pretty efficient methods of passive cooling for urban spaces and buildings. Differences in temperature between the urban space and the non-urban space which surrounds, is dubbed UHI (Urban Heat Island) effect. Water bodies have also been proven to be influential methods of decreasing urban temperatures. A water body temperature is capable of being lower than the surrounding urban environment around 2 -6 °C. According to these findings; one may conclude that the rise of evapotranspiration in cities, that has roots in vegetation and water body, can efficiently mitigate the influence of the urban heat island. Unfortunately, the effect that water bodies can have upon urban temperatures has not been thoroughly assessed in previous studies, specifically the difference between the daytime and night time influences of water bodies, and the matter the how urban design may be in influential in moving the cooling influence from the water bodies toward the city. This paper provides a theoretical background for the problem and reviews the related literature.

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“…They discovered that wetlands have an obvious influence on atmospheric temperature, which decreases as the distance from the wetland increases. Kochi is a fast-growing urban region in coastal South India interlaced by a network of canals and wetlands that is a part of the Vembanad Lake system [24]. Thomas and Zachariah investigated the UHI records of Kochi in summer and winter, and found that the UHI intensity is moderate compared with that observed in other cities in the region [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Urbanization of Wetlands on Microclimate: A Case Study of Xixi Wetland, Hangzhou, China

2016

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Urbanization affects the microclimate and forms a unique urban climate environment. To deepen the understanding on the microclimate regulation function of an urban wetland, this study analyzed the influence of a suburb wetland's urbanization process on the local climate through contrast observations of the protected wetland area and the former wetland area in Xixi wetland. Results show that the urbanization of suburb wetlands has an impact on the local microclimate and decreases human comfort, and that wetlands can effectively regulate the microclimate. The fragmentation of urban wetlands caused by urban sprawl decreases their microclimate regulation function, a decrease that is particularly evident in summer. Additionally, wetlands stabilize the microclimate in all seasons. For every land cover type in wetlands, vegetation has a better stabilizing effect on temperature, whereas a water body has a better stabilizing effect on wind speed and humidity. Meteorological conditions also affect the microclimate regulation function of wetlands. Temperature, humidity, atmospheric pressure, and wind speed influence the cooling function of urban wetlands, while solar radiation modifies the humidifying function of urban wetlands.

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Near-surface air temperature retrieval from satellite images and influence by wetlands in urban region

Cited by 46 publications

References 34 publications

Different response of surface temperature and air temperature to deforestation in climate models

Different response of surface temperature and air temperature to deforestation in climate models

Water Bodies an Urban Microclimate: A Review

Effect of the Urbanization of Wetlands on Microclimate: A Case Study of Xixi Wetland, Hangzhou, China

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