Sensitivity of soil evaporation and reference evapotranspirationto climatic variables in South Korea

Aydin, Mehmet; Jung, Yeong-Sang; Yang, Jae E.; Kim, Su-Jung; Kim, Kyung-Dae

doi:10.3906/tar-1406-170

Cited by 11 publications

(4 citation statements)

References 54 publications

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“…However, in the two-day measurement conditions, the process did not present significant difference among cycles I, IV and V, in no-tilled soil, and in cycles I, III, V, in conventional tillage, in relation to the other treatments (Table 4). These differences clearly demonstrate the effect of evaporative atmospheric demand on the soil water evaporation (Song et al, 2014;Aydin et al, 2015), since there was no significant difference in soil moisture in no-tillage among the evaluation cycles, except in cycle IV for the soil under conventional tillage (Table 5). Thus, if water is available on the soil surface (Zribi et al, 2015), the meteorological conditions define the potential for evaporation (Balwinder-Singh et al, 2014;Song et al, 2014;Teng et al, 2014;Tran et al, 2016), especially in stage I (Tesfuhuney et al, 2015) as described by Lemon (1956).…”

Section: Resultsmentioning

confidence: 81%

Evaporation of the soil water in response to the amount of straw and evaporative demand

Dalmago¹,

Bergamaschi²

2018

AgroM

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This study aimed to evaluate the soil water evaporation in response to the amount of straw on the surface and to the atmospheric evaporative demand. Two experiments were performed in a glass greenhouse at the Federal University of Rio Grande do Sul, in Porto Alegre, Brazil, in 2003. In one experiment, the evaporation was measured with 0, 2, 4, 8 and 16 t ha-1 of oat straw (Avena strigosa) on the soil surface. In another experiment, a fixed covering of 6 t ha-1 of straw was used, and evaporation was measured over five soil drying cycles, displaced in time for promoting different atmospheric demands. A completely randomized design was used in both experiments. Measurements were taken by weighing PVC microlysimeters containing soil monoliths, collected in field areas previously consolidated in no-till and conventional tillage systems. The average evaporation was 24% higher in bare soil than with 16 t ha-1 of straw on the surface. A significant difference was observed among the evaluation cycles, but the evaporation was ever higher in conventional tillage than in no-tilled soil. The vapor pressure deficit of air and the incoming solar radiation were the most important weather variables for the evaporation, regardless of tillage system or straw presence on the soil surface.

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Section: Resultsmentioning

confidence: 81%

Evaporation of the soil water in response to the amount of straw and evaporative demand

Dalmago¹,

Bergamaschi²

2018

AgroM

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“…Friction velocity was rated as the second most effective variable, whereas the contributions of Monin–Obukhov length and Schmidt number to the response were negligible (Table 1 ). According to Aydin et al ( 2015 ), the sensitivity outcomes may not reflect the site-specific conditions.…”

Section: Resultsmentioning

confidence: 99%

Transport dynamics of SARS-CoV-2 under outdoor conditions

Aydin

Evrendilek

Aydın

et al. 2022

Air Qual Atmos Health

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This study aimed at estimating the transport dynamics of a single severe acute respiratory syndrome corona-virus 2 (SARS-CoV-2)-laden droplet of 1 to 500 μm in diameter at a wind speed from 1 to 4 m/s. Motion dynamics of SARS-CoV-2-laden respiratory droplets under calm or turbulent air conditions were quantified using a combined model. Dalton’s law was implemented to estimate their evaporation. One-factor-at-a-time procedure was applied for the sensitivity analysis of model of deposition velocity. The transport distance of the single virus ranged from 167 to 1120 m as a function of the droplet size, wind speed, and falling time. The evaporation times of the droplets ≤ 3 and ≤ 14 μm in diameter were shorter than their settling times from 1.7 m in height at midnight and midday, respectively. Such droplets remained in the air for about 5 min as the droplet nuclei with SARS-CoV-2. The minimum transport distance of the respiratory droplets of 1–15 μm varied between 8.99 and 142 m at a wind speed range of 1–4 m/s, based on their deposition velocity. With their short transport distance, the larger droplet (30 to 500 μm) was not suspended in the air even under the windy conditions. The deposition velocity was found most sensitive to the droplet diameter. The droplets < 15 μm in diameter completely evaporated at midday and the droplet nuclei with the single virus can travel a minimum distance of 500 m under a horizontal wind speed of 3 m/s.

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“…In a recent study in Burkina Faso under tropical climate, Ndiaye et al (2017) reported that ET ref was most sensitive to changes in solar radiation, followed by maximum air temperature and wind speed. A study in South Korea showed that ET ref was mostly affected by relative humidity in humid subtropical climate conditions (Aydin et al, 2015). Vicente-Serrano et al (2014) reported that relative humidity, wind speed, and maximum air temperature had stronger impacts on ET ref than sunshine duration and minimum air temperature in the Mediterranean climate in Spain.…”

Section: Core Ideasmentioning

confidence: 99%

“…(2017) reported that ET ref was most sensitive to changes in solar radiation, followed by maximum air temperature and wind speed. A study in South Korea showed that ET ref was mostly affected by relative humidity in humid subtropical climate conditions (Aydin et al., 2015). Vicente‐Serrano et al.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of reference evapotranspiration to weather variables across seven regions of Turkey

Yildirim

Wagle

Gowda

et al. 2021

Agrosystems Geosci & Env

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Daily weather data from 1984 to 2018 for 14 weather stations representing seven regions of Turkey were used to estimate reference evapotranspiration (ETref). We performed sensitivity analyses of input weather variables (air temperature, wind speed, and solar radiation) to determine the relative effects of measurement errors in weather data on the accuracy of calculated grass (ETos) and alfalfa (Medicago sativa L., ETrs) reference ET. In addition, changes in estimated irrigation water requirement for maize (Zea mays L.), a major crop in all regions of Turkey, due to errors in major climatic variables were also determined across seven regions of Turkey. Comparison of the sensitivity coefficients indicated that ETref was most sensitive to wind speed (sensitivities from −2.46 to 5.56 mm d–1), followed by air temperature (sensitivities from −2.13 to 3.1 mm d–1) across Turkey. However, responses of ETos and ETrs to changes in weather variables varied across the regions. For examples, the Marmara region had the largest impact of errors in air temperature but the smallest impact of errors in wind speed on the calculated ETref. Likewise, the Southeastern and Eastern Anatolia regions had the greatest impact of errors in wind speed but the smallest impact of errors in air temperature on the calculated ETref. The errors in weather variables led to substantial over‐ or underestimation of irrigation water requirement for maize. In some cases, irrigation water requirement was overestimated by more than double. These results suggest that different sensor accuracies are needed for weather stations in different regions of Turkey to accurately estimate ETref and irrigation water requirement.

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Sensitivity of soil evaporation and reference evapotranspirationto climatic variables in South Korea

Cited by 11 publications

References 54 publications

Evaporation of the soil water in response to the amount of straw and evaporative demand

Evaporation of the soil water in response to the amount of straw and evaporative demand

Transport dynamics of SARS-CoV-2 under outdoor conditions

Sensitivity of reference evapotranspiration to weather variables across seven regions of Turkey

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