Long-term change in surface air temperature over DPR Korea, 1918–2015
Land surface air temperature (SAT) change is one of the core issues in monitoring and assessing regional climate change. In this study, the characteristics of SAT change over DPR Korea for the period 1918–2015 were investigated using a high-quality historical dataset. Results show that the region-averaged annual mean SAT increased 0.21 °C/decade for the period 1918–2015 on the basis of data from four stations and 0.19 °C/decade for the period 1941–2015 as estimated based on data from nine stations. Before the 1970s, Pyongyang station in the central region experienced the largest warming trend. Linear trends of seasonal mean SAT during 1941–1970 were negative for all seasons in eastern coast and for summer and autumn in western coast and northern inland areas. Since 1971, however, the annual and seasonal mean SAT trends have shifted to positive values in all regions, with winter experiencing the most rapid warming. During the period of global warming slowdown since 1998 or 2000, no significant seasonal warming trend of wintertime was detectable, and this caused the smallest winter warming for the last 45 years. Other seasons also witnessed a generally weakened warming during 1971–2015 compared to that of 1971–2000. The results of the study will help in understanding regional climate change and in assessing the impacts of climate change on economic and natural ecosystems in the country.
We would like to thank the State Hydro-Meteorological Administration (SHMA) of PDRK for providing the observed monthly temperature data and the topographical map data of the study region. The first author shows his gratitude to many teachers and students in the School of Environmental Studies of China University of Geosciences, Wuhan, who gave their selfless helps to him during his stay in China. He also appreciates the help from his colleague Kum-Su Li from Kim Il Sung University.
This work is supported by the National Key R&D Program of China (no. 2018YFA0605603).
- Aguilar E, Auer I, Brunet M, Peterson TC, Wieringa J (2003) Guidelines on climate metadata and homogenization, WCDMP no. 53, WMO/TD no. 1186. Tech. Rep., World Meteorological OrganizationGoogle Scholar
- Cao LJ, Zhao P, Yan ZW et al (2013) Instrumental temperature series in eastern and Central China back to the nineteenth century. J Geophys Res 118:8197–8207Google Scholar
- Ding YH, Ren GY (eds) (2008) Introduction to climate change science of China. China Meteorological Press, Beijing, p 281Google Scholar
- Dong MY, Zheng-Fang WU, Jiang Y (2009) Comparative analysis of temperature change in the regions of Northeast China and Hokkaido, Japan over the last hundred years. Sci Geogr Sin 29(5):684–689Google Scholar
- IPCC (2013) Climate Change 2013: the physical science basis. In: Stocker TF, Qin D, Plattner G-K, Tignor M, Allen SK, Boschung J, Nauels A, Xia Y, Bex V, Midgley PM (eds) Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, p 1535Google Scholar
- Kim SO, Yun JI, Kim SO (2011) Mapping monthly temperature normal across DPR Korea at a landscape scale. Trans Korean Inst Electr Eng 13(1). (in Korean)Google Scholar
- Ren GY, Xu MZ, Chu ZY et al (2005) Changes of surface air temperature in China during 1951–2004. Clim Environ Res 10:717–727Google Scholar
- Sun FH, Ren G, Zhao C et al (2005) An analysis of temperature change under varied underlying surfaces. Sci Geogr Sin 25(2):167–171Google Scholar
- Sun FH, Yang XQ, Lu S, Yang SY (2006) The contrast analysis on the average and extreme temperature trend in Northeast China. Sci Meteorol Sin 26(2):157–163Google Scholar
- Sun XB, Ren GY, Ren YY, Fang YH, Liu YL, Xue XY, Zhang PF (2017b) A remarkable climate warming hiatus over Northeast China since 1998. Theor Appl Climatol 9:1–16Google Scholar
- Tang GL, Ren GY (2005) Reanalysis of surface air temperature change of the past 100 years over China. Clim Environ Res 10(4):791–798 (in Chinese)Google Scholar
- Wang FX, Liu JP (2016) Spatio-temporal change characteristic of annual temperature range over Northeast China, 1961–2010. J Changchun Normal Univ 2016(8) (in Chinese)Google Scholar
- WMO (2004) Fourth Seminar for Homogenization and Quality Control in Climatological Databases World Meteorological Organization (WMO) - WMO, 2004 (WMO/TD, 1236)
- Yun J-D (1996) A dictionary of meteorology. Kim Il Sung University Press, Pyongyang, pp 70–72 (in Korean)Google Scholar
- Zhang AY, Ren GY, Zhou JX et al (2010) Urbanization effect on surface air temperature trends over mainland China. Acta Meteorol Sin 68(6):957–966 (in Chinese)Google Scholar
- Zhao CY, Ren GY, Zhang YF et al (2009) Climate change in Northeast China over the past 50 years. J Arid Land Resour Environ 23(7):25–30Google Scholar
- Zhou YQ, Ren GY (2014) Urbanization effect on long-term trends of extreme temperature events in North China. Plateau Meteorol 33(6):1589–1958Google Scholar