강원특별자치도 중위도 전이대의 열 지표 변화와 농업기후 임계 지표 추이 분석(1997–2023)

초록

This study analyzed long-term changes in thermal demand and agro-climatic threshold indicators in Gangwon Province, Korea, a mid-latitude transitional region with distinct coastal, inland, and mountainous climatic settings. Daily temperature data from 11 ASOS meteorological stations for 1997–2023 were used to examine changes in heating degree days (HDD), cooling degree days (CDD), dominance index (DI), frost days (FD), and frost-free period (FFP). In this study, HDD, CDD, and DI were used to describe changes in thermal demand composition, while FD and FFP were used to evaluate low-temperature threshold conditions relevant to agricultural climate. Results showed decreasing HDD and increasing CDD across most stations, but the magnitude and interpretation differed by region. Inland stations showed the clearest weakening of colddominated conditions and the largest increase in CDD, whereas mountainous stations retained high HDD values despite the emergence of small but increasing CDD. FD decreased and FFP increased mainly in inland and coastal regions, while changes in mountainous regions were limited or statistically weak. These findings indicate that recent thermal changes in Gangwon Province are not spatially uniform but differ according to elevation, maritime influence, and initial thermal conditions. The results should therefore be interpreted as station-based evidence of regional thermal and low-temperature threshold changes, providing a quantitative basis for future agricultural and energy adaptation assessments.

키워드