Observation and simulation of thermal environment in a paddy field

Saptomo, Satyanto Krido; Nakano, Yoshiaki; Yuge, Koretaka; Haraguchi, Tomokazu

doi:10.1007/s10333-004-0047-2

Cited by 16 publications

(9 citation statements)

References 18 publications

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“…I obtained a positive correlation for urban fabric land use in accordance with many of the latest studies, such as [38][39][40]. Agricultural and natural land uses that were converted into generally urban areas (built-up residential areas and touristic buildings with paved roads) were represented by increasing air temperature anomalies as reported by [41,42] for examined periods. Forest land cover based on the vegetation canopy shade was negatively correlated with air temperature anomalies in this study, similar to other scientific research (e.g., [43][44][45][46][47][48]).…”

Section: Regression Analysis Of Air Temperature Anomalies and Lulc Chsupporting

confidence: 55%

Assessing the Correlation between Land Cover Conversion and Temporal Climate Change—A Pilot Study in Coastal Mediterranean City, Fethiye, Turkey

Çinar

2015

Atmosphere

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Abstract:The rapid growth and expansion of urbanized landscapes in cities has resulted in an increase in air temperature and has lowered the bioclimatic comfort levels in urban landscapes. Recent studies to estimate the climatic response of urban landscape conversion have mostly examined the relationship between land use/land cover (LULC) change and land surface temperature (LST) data collected using advanced remote sensing (RS) techniques instead of atmospheric temperature. In this respect, four decadal Landsat images from the 1980s were used to investigate the impact of landscape transformation on atmospheric temperature. The mean and average minimum and maximum monthly air temperature datasets were used in the analysis. The CORINE (Coordination of Information on Environment) index was used to determine LULC diversity in an urban development boundary and urban periphery. Consequently, clustered LULC change values for the last three decades were integrated with decadal air temperature anomalies. The findings revealed an important relationship between monthly mean air temperature and land changes over recent decades, which resulted in an increase in urban fabric land use, deforestation land cover changes and conversion of permanent crop fields to artificial green houses for earlier vegetable production; the R-sqr values for these regressions were 97.7%, 88.5% and 90.6% respectively. On the other hand, the most important increasing temperature trends were obtained for the average monthly minimum air temperature, which supports the global warming concerns of the IPCC (Intergovernmental Panel on Climate Change) and related studies, which have concluded that an increased nighttime temperature results in urban heat islands (UHIs). The results should be used to support better urban landscape plans and architectural designs to improve human thermal comfort for sustainable urban life in Mediterranean cities. Street geometry and orientation to wind

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Section: Regression Analysis Of Air Temperature Anomalies and Lulc Chsupporting

confidence: 55%

Assessing the Correlation between Land Cover Conversion and Temporal Climate Change—A Pilot Study in Coastal Mediterranean City, Fethiye, Turkey

Çinar

2015

Atmosphere

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“…The values of extinction coefficient of shortwave radiation and long-wave radiation in a canopy are 0.5 and 0.8, respectively (Goudriaan and van Laar, 1994). Fp increases with LAI, and it is given as follows (Saptomo et al, 2004;Ohta and Kimura, 2007):…”

Section: Methodsmentioning

confidence: 99%

The effects of plant growth on the temperature of paddy waters

Ohta¹,

Kimura²

2009

J. Agric. Meteorol.

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Water temperature and the growth of rice plants are interrelated and influence each other. To elucidate this relationship, and in particular, to quantify the effects of the growth of rice plants on water temperature, this study focused on the difference between the temperature of paddy water and that of open shallow waters devoid of rice plants. Here, we simultaneously analyzed the seasonal changes in the difference of water temperatures and the growth of rice plants. A water temperature model based on the energy balance equation and the average climate data from 1971 to 2000 were used to estimate the daily mean temperature of paddy waters in conjunction with the growth of rice plants during the growing season in Japan at a spatial resolution of approximately 1 km 1 km. The most notable result from the simulation experiment is the fact that the temperature of paddy waters increases by approximately 0.3 from spring to early summer and decreases by approximately 1.5 -2.0 in midsummer compared to that of open shallow waters. This is because the net radiation at the surface of paddy waters is affected not only by climate factors but also by the increase in the leaf area index of rice plants. The net radiation and the temperature of paddy waters during the growing season are significantly determined by the balance of the downward flux of long-wave radiation emitted from the plant layer and the extent to which short-wave radiation is intercepted by the foliage of rice plants. Therefore, even under identical climate conditions, a shift in the transplanting date could affect the temperature of paddy waters due to an increase in the leaf area.

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“…The parameters used for the model are those taken from Saptomo et al (2004). Variations in heat fluxes resulting from the simulation are depicted in Figs.…”

Section: Variation In Heat and Evapotranspirationmentioning

confidence: 99%

“…The models were used to project the effect on, for example, evapotranspiration over paddy fields (Yu et al 2002) or temperature changes and afterward rice production (Iizumi et al 2007). Instead of using a similar model, in this simulation, a detailed model of paddy microenvironment is used, based on the model of irrigated paddy field proposed by Saptomo et al(2004).…”

Section: Simulation Modelmentioning

confidence: 99%

Climate change effects on paddy field thermal environment and evapotranspiration

Saptomo

Setiawan

Yuge

2009

Paddy Water Environ

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The effect of air temperature increase from meteorological data on thermal microenvironment of irrigated paddy field is simulated using energy balance model. Statistical test was used to determine the existence of the trend in temperature change of data from meteorological stations in Indonesia. The temperature was tested to have positive trend, and it was used to generate future and past increase of temperature for the simulation. According to the simulation, the change in energy balance occurs following additional heat contributed by the increase of air temperature. The results show that irrigated paddy field seems to have function of decreasing effect of temperature increase whereas, evapotranspiration increases. However, increasing air temperature also increases temperature in paddy system, but seems to be more moderate than in nonpaddy field.

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Observation and simulation of thermal environment in a paddy field

Cited by 16 publications

References 18 publications

Assessing the Correlation between Land Cover Conversion and Temporal Climate Change—A Pilot Study in Coastal Mediterranean City, Fethiye, Turkey

Assessing the Correlation between Land Cover Conversion and Temporal Climate Change—A Pilot Study in Coastal Mediterranean City, Fethiye, Turkey

The effects of plant growth on the temperature of paddy waters

Climate change effects on paddy field thermal environment and evapotranspiration

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