Changes in agro-climatic indices related to temperature in Central Chile

Piticar, Adrian

doi:10.1007/s00484-019-01681-6

Cited by 16 publications

(20 citation statements)

References 30 publications

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“…This index is referred to as accumulated heat stress (AHS) on rice reproductive growth in this study. Next, we use the plant heat stress (PHS) index that counts the number of days with Tmax above 30 • C, which was introduced in Piticar (2019). The threshold of 30 • C seems to be appropriate to reflect the heat tolerance of crops acclimatized to the climatic condition of Korea.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Temperature-Based Agricultural Indices Over Korea From the High-Resolution WRF Simulation

Qiu

et al. 2021

Front. Earth Sci.

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This study evaluates the performance of dynamical downscaling of global prediction generated from the NOAA Climate Forecast System (CFSv2) at subseasonal time-scale against dense in-situ observational data in Korea. The Weather Research and Forecasting (WRF) double-nested modeling system customized over Korea is adopted to produce very high resolution simulation that presumably better resolves geographically diverse climate features. Two ensemble members of CFSv2 starting with different initial conditions are downscaled for the summer season (June-July-August) during past 10-year (2011–2020). The comparison of simulations from the nested domain (5 km resolution) of WRF and driving CFSv2 (0.5°) clearly demonstrates the manner in which dynamical downscaling can drastically improve daily mean temperature (Tmean) and daily maximum temperature (Tmax) in both quantitative and qualitative aspects. The downscaled temperature not only better resolves the regional variability strongly tied with topographical elevation, but also substantially lowers the systematic cold bias seen in CFSv2. The added value from the nested domain over CFSv2 is far more evident in Tmax than in Tmean, which indicates a skillful performance in capturing the extreme events. Accordingly, downscaled results show a reasonable performance in simulating the plant heat stress index that counts the number of days with Tmax above 30°C and extreme degree days that accumulate temperature exceeding 30°C using hourly temperature. The WRF simulations also show the potential to capture the variation of Tmean-based index that represents the accumulation of heat stress in reproductive growth for the mid-late maturing rice cultivars in Korea. As the likelihood of extreme hot temperatures is projected to increase in Korea, the modeling skill to predict the ago-meteorological indices measuring the effect of extreme heat on crop could have significant implications for agriculture management practice.

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Section: Introductionmentioning

confidence: 99%

An Evaluation of Temperature-Based Agricultural Indices Over Korea From the High-Resolution WRF Simulation

Qiu

et al. 2021

Front. Earth Sci.

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“…Temperature is a key factor that affects plant growth and development. Sub‐zero temperatures can damage and even kill crops (Piticar, 2019) due to extracellular ice formation that dehydrates cells and subsequently damages membranes (Nagao et al., 2008; Thomashow, 1999), cells disruption due to fusion between cellular and intercellular membranes can occur while the ice is formed (Takahashi et al., 2018; Thomashow, 1999). Low temperature may induce photoinhibition by producing an imbalance between light energy absorbed and plant capability to assimilate it (Huner et al., 1993) resulting in oxidative stress or directly damage to the photosynthetic apparatus which is imbedded in thylakoid membranes, this leads to a reduction in photosynthesis efficiency (Ruelland et al, 2009; Khan et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

“…With climate change in mind, the number of frost days and their duration may decrease (Ma, Huang, et al., 2019; Müller et al., 2018; Piticar, 2019); eastern Paraguay, Uruguay, southern Brazil, and northern Argentina are expecting fewer frost days because minimum temperatures are gradually increasing (Müller et al., 2018). A similar pattern was observed in the northern hemisphere between 1980 and 2000, where a decrease of the number of frost days was observed, especially in north‐western North America, northern Siberia, and the Tibetan Plateau; however, different behaviour was observed in Europe and central North America, where the number of frost days increased, especially in spring.…”

Section: Introductionmentioning

confidence: 99%

“…The frost behaviour is unclear in Chile, Piticar (2019) has predicted that the number of frost days will significantly decline between La Serena and Puerto Montt, but the frost duration period will increase between Temuco and Puerto Montt. Therefore, frost patterns in Chile are quite uncertain, even though the minimum temperatures may increase by up to 2°C by 2,100 (Araya‐Osses et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…

Most crops of economic importance are vulnerable to environmental abiotic stresses, such as drought, extreme temperatures, and salinity (Khan et al, 2017;Piticar, 2019). Temperature is a key factor that affects plant growth and development.

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confidence: 99%

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Chemical products for crop protection against freezing stress: A review

Román‐Figueroa

Bravo

Paneque

et al. 2021

J Agronomy Crop Science

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Most crops of economic importance are vulnerable to environmental abiotic stresses, such as drought, extreme temperatures, and salinity (Khan et al., 2017;Piticar, 2019). Temperature is a key factor that affects plant growth and development. Sub-zero temperatures can damage and even kill crops (Piticar, 2019) due to extracellular ice formation that dehydrates cells and subsequently damages membranes (Nagao et al., 2008;Thomashow, 1999), cells disruption due to fusion between cellular and intercellular membranes can occur while the ice is formed (Takahashi et al., 2018;Thomashow, 1999). Low temperature may induce photoinhibition by producing an imbalance

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