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http://dx.doi.org/10.5532/KJAFM.2012.14.3.124

Freeze Risk Assessment for Three Major Peach Growing Areas under the Future Climate Projected by RCP8.5 Emission Scenario  

Kim, Soo-Ock (National Center for Agro-Meteorology, Seoul National University)
Kim, Dae-Jun (National Center for Agro-Meteorology, Seoul National University)
Kim, Jin-Hee (National Center for Agro-Meteorology, Seoul National University)
Yun, Jin-I. (Department of Ecological Engineering, Kyung Hee University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.14, no.3, 2012 , pp. 124-131 More about this Journal
Abstract
This study was carried out to evaluate a possible change in freeze risk for 'Changhowon Hwangdo' peach buds in three major peach growing areas under the future climate projected by RCP8.5 emission scenario. Mean values of the monthly temperature data for the present decade (2000s) and the future decades (2020s, 2050s, 2080s) were extracted for farm lands in Icheon, Chungju, and Yeongcheon-Gyeongsan region at 1km resolution and 30 sets of daily temperature data were generated randomly by a stochastic process for each decade. The daily data were used to calculate a thermal time-based dormancy depth index which is closely related to the cold tolerance of peach buds. Combined with daily minimum temperature, dormancy depth can be used to estimate the potential risk of freezing damage on peach buds. When the freeze risk was calculated daily for the winter period (from 1 November to 15 March) in the present decade, Icheon and Chungju regions had high values across the whole period, but Yeongcheon-Gyeongsan regions had low values from mid-December to the end of January. In the future decades, the frequency of freezing damage would be reduced in all 3 regions and the reduction rate could be as high as 75 to 90% by 2080's. However, the severe class risk (over 80% damage) will not disappear in the future and most occurrences will be limited to December to early January according to the calculation. This phenomenon might be explained by shortened cold hardiness period caused by winter warming as well as sudden cold waves resulting from the higher inter-annual climate variability projected by the RCP8.5 scenario.
Keywords
Peach; Freeze risk; Climate change; RCP8.5; Cold hardiness;
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Times Cited By KSCI : 6  (Citation Analysis)
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