scholarly journals Influence of Canopy Cover on Surface Temperature

2020 ◽  
Vol 13 (07) ◽  
pp. 3275
Author(s):  
Vitor Vieira Vasconcelos ◽  
Helenice Maria Sacht
Keyword(s):  
Multiple Regression ◽  
Rural Areas ◽  
Canopy Cover ◽  
Daily Temperature ◽  
Anthropogenic Sources ◽  
Adjacent Area ◽  
Daily Temperature Range ◽  
Temperature Range ◽  
Canopy Effect ◽  
Urbanized Areas

Trees affect the microclimate, which influences thermal comfort and ecosystem processes. This study investigated the influence of the canopy cover on daily maximum and minimum temperatures. The data are from a collaborative database, and each measurement consists of the minimum and maximum temperatures under the canopy and in an open adjacent area over a 24-hour period. Paired sample t-tests indicated that the canopy decreased the maximum and minimum daily temperatures and narrowed the daily temperature range. Multiple regression showed that the canopy cover percentage decreased the maximum daily temperatures, and this effect was greater in rural areas than in urbanized areas. Another multiple regression indicated that the canopy cover percentage and the distance to the edge of the canopy decreased the daily temperature range. An independent sample t-test also indicated that the effect of the canopy on the daily temperature range was higher in rural areas when analysed by parametric and non-parametric tests but not when measured by a robust test. Other independent sample t-tests indicated that the distance from a light source also decreased the canopy effect on the minimum daily temperature and the daily temperature range. The main plausible underlying processes include the canopy shade and wind insulation, litter insulation of the ground surface, heat pumps through evapotranspiration and lateral heat fluxes from light bulbs and other anthropogenic sources, especially in urbanized areas. These results provide a greater understanding of the effects of arborization in rural and urban ecosystems, as well as their respective benefits to human communities.

scholarly journals The Association between the Frequency of Rhegmatogenous Retinal Detachment and Atmospheric Temperature

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Dong Yoon Kim ◽  
Hyeseong Hwang ◽  
Jae-Hyung Kim ◽  
Byung Gil Moon ◽  
Sung Min Hyung ◽  
...  
Keyword(s):  
Retinal Detachment ◽  
Rhegmatogenous Retinal Detachment ◽  
Experimental Studies ◽  
Atmospheric Temperature ◽  
Temperature Data ◽  
Daily Temperature ◽  
University Hospital ◽  
Daily Temperature Range ◽  
Temperature Range ◽  
Monthly Average

Rhegmatogenous retinal detachment (RRD) frequency was observed to be higher with an increase in the daily temperature range. This showed that a wide daily range of temperature, rather than the absolute value of the temperature, is associated with the occurrence of RRD. Purpose. To investigate the association between the frequency of rhegmatogenous retinal detachment (RRD) and the atmospheric temperature. Method. A retrospective review of consecutive eyes that had undergone primary RRD surgery from 1996 to 2016 at Chungbuk National University Hospital was conducted. Temperature data (highest, lowest, and mean daily temperatures and daily temperature range) in Chungbuk Province were obtained from the Korean Meteorological Administration database. We investigated the relationship between the daily temperature range and the frequency of RRD surgery. We also analyzed the association between various temperature data and the frequency of RRD surgery. Result. There were 1,394 RRD surgeries from 1996 to 2016. Among them, 974 eyes were included in this study. The monthly average number of RRD operations showed a bimodal peak (in April and October) throughout the year. With the same tendency as the frequency of RRD, the monthly average of the daily temperature range over 1 year also showed a bimodal peak in April and October. There was a significant positive correlation between the monthly average of the daily temperature range and the number of RRD surgeries (r = 0.297, P<0.001). However, there were no associations between RRD frequency and the mean temperature, highest temperature, and lowest temperature. Conclusion. The higher the daily temperature range, the higher was the RRD frequency observed. We speculated that dynamic changes in temperature during the day may affect degrees in chorioretinal adhesion and liquefaction of the vitreous, which may eventually result in retinal detachment. Therefore, further experimental studies on the correlation between temperature changes and retinal detachment are needed.

scholarly journals Toward a Reassessment of Daily Temperature Range Trends

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
Terri Cook
Keyword(s):  
Climate Change ◽  
Diurnal Temperature Range ◽  
Daily Temperature ◽  
Range Data ◽  
Data Set ◽  
Daily Temperature Range ◽  
Diurnal Temperature ◽  
Temperature Range

To reduce the uncertainty associated with this important climate change index, recent studies have developed a new diurnal temperature range data set and compared the results to previous estimates.

XV. On the variations of the daily range of atmospheric temperature as recorded at the Kew Observatory

1877 ◽  
Vol 25 (171-178) ◽  
pp. 156-158
Keyword(s):  
Atmospheric Temperature ◽  
Daily Temperature ◽  
Daily Temperature Range ◽  
Daily Range ◽  
Temperature Range

The daily temperature-range was selected as an element which affords a good indication of the varying meteorological activity of the place, and the observations of which can be easily made and reduced. The records of the Kew Observatory were chosen because there the atmospheric temperature has been very carefully observed during a long series of years. The writer desires to thank the Kew Committee for giving him access to the records of the maximum and minimum temperatures taken at the Kew Observatory. Twenty-one years of these records have been reduced, beginning with the year 1855 and ending with 1875. Two complete sun-spot periods are embraced in these observations.

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