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Implementing the Urban Effect in an Interpolation Scheme for Monthly Normals of Daily Minimum Temperature  

최재연 (경기도 화성시농업기술센터)
윤진일 (경희대학교 생태시스템공학과/생명자원과학연구원)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.4, no.4, 2002 , pp. 203-212 More about this Journal
Abstract
This study was conducted to remove the urban heat island effects embedded in the interpolated surfaces of daily minimum temperature in the Korean Peninsula. Fifty six standard weather stations are usually used to generate the gridded temperature surface in South Korea. Since most of the weather stations are located in heavily populated and urbanized areas, the observed minimum temperature data are contaminated with the so-called urban heat island effect. Without an appropriate correction, temperature estimates over rural area or forests might deviate significantly from the actual values. We simulated the spatial pattern of population distribution within any single population reporting district (city or country) by allocating the reported population to the "urban" pixels of a land cover map with a 30 by 30 m spacing. By using this "digital population model" (DPM), we can simulate the horizontal diffusion of urban effect, which is not possible with the spatially discontinuous nature of the population statistics fer each city or county. The temperature estimation error from the existing interpolation scheme, which considers both the distance and the altitude effects, was regressed to the DPMs smoothed at 5 different scales, i.e., the radial extent of 0.5, 1.5, 2.5, 3.5 and 5.0 km. Optimum regression models were used in conjunction with the distance-altitude interpolation to predict monthly normals of daily minimum temperature in South Korea far 1971-2000 period. Cross validation showed around 50% reduction in terms of RMSE and MAE over all months compared with those by the conventional method.conventional method.
Keywords
global warming; urbanization; urban heat island; digital population model;
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  • Reference
1 Choi, J. Y., 2002: Interpolating monthly normals of daily minimum temperature over South Korea based on urban heat island correction. Proceedings of 4th Conference of Agricultural and Forest Meteorology. Korean Society of gricultural and Forest Meteorology (Nov. 1, Suwon, Korea) 81-84.
2 Han, Y. H., B. H. Kim and D. I. Lee, 1993: A study on the urban heat island in Pusan, Korea. Journal of Korean Meteorological Society, 29(3), 205-216 (In Korean with English abstract).
3 Hansen, J. and S. Lebedeff, 1987: Global trends of measured surface air temperature. Journal of Geophysical Research, 92, 637-658.
4 Hansen, J., W. Lawrence, D. Easterling, T. Peterson, T. Karl, R. Ruedy, M. Sato and M. Imhoff, 2001: A closer look at United States and global surface temperature change. Journal of Geophysical Research (D:Atmospheres), 106(20), 23947-23963.
5 Park, H. S., 1986: Features of the heat island in Seoul and its surrounding cities. Atmospheric Environment, 20, 1859-1866.
6 Peterson, T. C., A. Huang, D. A. Mckittrick, K. P. Gallo, J. Lawrimore and T. W. Owen, 1999: Global rural temperature trends. Geophysical Research Letters, 26(3), 329-332.
7 Ryoo, S. B., S. E. Moon and B. G. Cho, 1993: Air temperature change due to urbanization in South Korea. Journal of Korean Meteorological Society, 29(2), 99-116 (In Korean with English abstract).
8 Yun, J. I., J. Y. Choi, Y. K. Yoon and U. Chung, 2000: A spatial interpolation model for daily minimum temperature over mountainous regions. Korean Journal of Agricultural and Forest Meteorology, 2, 175-182 (In Korean with English abstract).
9 Jones, P., P. M. Kelly and C. M. Goodess, 1989: The effect of urban warming on the Northern hemisphere temperature average. Journal of Climate, 2, 285-290.
10 Karl, T. R., H. F. Diaz and G. Kukla, 1988: Urbanization: its detection in the United States climate record. Journal of Climate, 1, 1099-1123.
11 Kato, H., 1996: A statistical method for separating urban effect trends from observed temperature data and its application to Japanese temperature records. Journal of Meteorological Society of Japan, 74(5), 639-653.
12 KMA, 2001: Climatological Normals of Korea 1971-2000. Korea Meteorological Administration, 632pp.
13 Yun, J. I., J. Y. Choi and J. H. Ahn, 2001: Seasonal trend of elevation effect on daily air temperature in Korea. Korean Journal of Agricultural and Forest Meteorology, 3, 96-104 (In Korean with English abstract).
14 Hulme, M., Z. -C. Zhao and T. Jiang, 1994: Recent and future climate change in East Asia. International Journal of Climatology, 14(6), 637-658.
15 Ryoo, S. B. and S. E. Moon, 1995: Detection of warming effects due to industrialization: An accumulated intervention model with an application in Pohang, Korea. Journal of Applied Meteorology, 34, 1466-1471.
16 Kim, M. K., I. S. Kang and C. H. Kwak, 1999: The estimation of urban warming amounts due to urbanization in Korea for the recent 40 years. Journal of Korean Meteorological Society, 35(1), 118-126 (In Korean with English abstract).
17 Lee, M. I. and I. S. Kang 1997: Temperature variability and warming trend in Korea associated with global warming. Journal of Korean Meteorological Society, 33(3), 429-443 (In Korean with English abstract).
18 Oke, T. R., 1987: Boundary Layer Climates (2nd Edition), Methuen, 291-292.
19 Fujibe, F., 1988: Weekday-weekend differences of urban climates. Part 2 Detection of temperature differences for medium- and small-sized sites. Journal of Meteorological Society of Japan, 66(2), 373-376.
20 Cho, H. M., C. H. Cho and K. W. Chung, 1988: Air temperature changes due to urbanization in Seoul area. Journal of Korean Meteorological Society, 24, 27-37 (In Korean with English abstract).
21 Rho, C. S., 1973: On the rising trend of air temperature in Seoul area. Journal of Korean Meteorological Society, 9(2), 49-58 (In Korean with English abstract).
22 Nakatsuji, K., A. Yamaki, H. Minami, A. Sato and K. Muraoka, 1997: Effects of urbanization on ground surface temperature in the Kansai District, Japan, based on meterological data. Journal of Global Environment Engineering, 3, 183-197.
23 Yoon, I. H., K. D. Min and K. E. Kim, 1994: A study on the meteorological characteristics of Taegu area and its application to the atmospheric dispersion modelling II. Characteristic features of the urban heat island : Case study. Journal of Korean Meteorological Society, 30(2), 303-313 (In Korean with English abstract).
24 Chung Y. S. and M. B. Yoon, 1999: Recent climate change and related factors observed in Korea. Journal of Korean Meteorological Society, 35(3), 309-318.
25 Kang, I. S., 1995: Examination of the uncertainties of global warming. Journal of Korean Meteorological Society, 31(2), 187-190 (In Korean with English abstract).