DOI QR코드

DOI QR Code

Analysis of Variations in Soil Heat Flux and Air Temperature by Net Radiation at a Mud Flat in Hampyeong Bay

함평만 갯벌에서 순복사에 의한 토양열 플럭스와 기온의 변동 분석

  • Park, Ho-seon (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kwon, Byung Hyuk (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kim, Il-Kyu (Department of Environmental Engineering, Pukyong National University) ;
  • So, Yoon Hwan (Geo-Sciences Institute, Pukyong National University) ;
  • Oh, Se Bong (Korea Rural Community Corporation) ;
  • Kang, Dong-hwan (Environmental Research Institute, Pukyong National University)
  • Received : 2017.06.14
  • Accepted : 2017.08.28
  • Published : 2017.09.30

Abstract

In this study, we analyze changes in soil heat flux and air temperature in August (summer) and January (winter) according to net radiation, at a mud flat in Hampyeong Bay. Net radiation was observed as $-84.2{\sim}696.2W/m^2$ in August and $-79.4{\sim}352.5W/m^2$ in January. Soil heat flux was observed as $-80.7{\sim}139.5Wm^{-2}$ in August and $-49.09{\sim}137W/m^2$ in January. Air temperature was observed as $24.2{\sim}32.9^{\circ}C$ in August and $-1.5{\sim}11.1^{\circ}C$ in January. The rate of soil heat flux for net radiation ($H_G/R_N$) was 0.17 in August and 0.34 in January. Because the seasonal fluctuation in net radiation was bigger than the soil heat flux, net radiation in August was bigger than in January. We estimated a linear regression function to analyze variations in soil heat flux and air temperature by net radiation. The linear regression function and coefficient of determination for the soil heat flux by net radiation was y=0.19x-7.94, 0.51 in August, and y=0.39x-11.69, 0.81 in January. The time lag of the soil heat flux by net radiation was estimated to be within ten minutes in August 2012 and January 2013. The time lag of air temperature by net radiation was estimated at 160 minutes in August, and 190 minutes in January.

Acknowledgement

Supported by : 한국연구재단

References

  1. An, J. B., Kim, J., Ryu, C. S., Park, S. K., Seo, M. S., Lee, H. W., Chung, I. U., Chung, H. B., 2016, The atmosphere, 13th ed., Sigmapress, 72-74.
  2. Arya, S. P., 2001, Introduction to micrometeorology, 1st ed., Academic Press, 38-40, 50-57.
  3. Cui, R. X., Lee, B. W., 2001, Soil surface energy balance and soil temperature in potato field mulched with recycled-paper and black plastic film, Korean Journal of Crop Science, 46, 229-235.
  4. Deardorff, J. W., 1978, Efficient prediction of ground surface temperature and moisture, with inclusion of a layer of vegetation, American Geophysical Union, 83, 1889-1903.
  5. Humes, K. S., Kustas, W. P., Moran, M. S., 1994, Use of remote sensing and reference site measurements to estimate instantaneous surface energy balance components over a semiarid rangeland watershed, Water Resources Research, 30, 1363-1373. https://doi.org/10.1029/93WR03082
  6. Jeon, E. C., Woo, J. H., 1999, Statistical analysis of the meteorological elements for ozone and development of the simplified model for ozone concentration, J. of Korean Society for Atmospheric Environment, 15, 257-266.
  7. Kim, G. G., 2003, Wetland and environment, 1st ed., Academysujuk, 174-179.
  8. Kim, H. J., Kim, D. S., Yoon, I. H., Lee, D. I., Kwon, B. H., 2007, Net radiation and soil heat fluxes measured on coastal wetland covered with reeds, Journal of the Environmental Sciences, 16, 223-239.
  9. Kim, H. T., Park, Y. H., Kim, Y. H., Um, H. H., Choi, B. C., 2002, Temporal and spatial variation of soil heat flux within coniferous canopy in Kwangneung arboretum, Proceeding of the 34th Meeting of KOSAE(2002) Korean Society for Atmospheric Environment, 430-431.
  10. Kim, Y. H., Cho, K. S., Kim, H. T., Um, H. H., Choi, B. C., 2003, Characteristics of the seasonal variation of the radiation in a mixed forest at Kwangneung arboretom, Journal of Korean Society for Atmospheric Environment, 19, 285-296.
  11. Kustas, W. P., Daughtry, C. S. T., van Oevelen, P. J., 1993, Analytical treatment of the relationships between soil heat flux/net radiation ratio and vegetation indices, Remote Sensing of Environment, 46, 319-330. https://doi.org/10.1016/0034-4257(93)90052-Y
  12. Park, S. Y., 2000, Current issues: Last report of nature, look again the wetlands, Local Forum, 5, 84-85.
  13. Park, Y. H., Kim, H. T., Lee, B. L., Kim, Y. H., Um, H. H., Choi, B. C., Ryoo, S. B., 2003, The variation of soil heat flux within mixed forest in Kwangneung arboretum, Journal of the Atmospheric Sciences, 39, 621-629.
  14. Park, Y. H., Lee, B. L., Cho, K. S., 2003, Spatial variability of soil heat fluxes in a conifer forest, Korean Journal of Agricultural and Forest Meteorology, 5, 81-86.
  15. Santanello, J. A., Friedl, M. A., 2003, Diurnal covariation in soil heat flux and net radiation, Journal of Applied Meteorology and Climatology, 42, 851-862. https://doi.org/10.1175/1520-0450(2003)042<0851:DCISHF>2.0.CO;2