Toward a ground-based and long-term meteorological forcing dataset for South Korea

Details

• Journal Title:
  Theoretical and Applied Climatology
• Personal Author:
  Lee, Kyungtae ; Kang, Do Hyuk ; Jung, Hahn Chul ; Park, Gwangha ; Gye, Changwoo ; Kumar, Sujay ; Kim, Edward J. ; Peters-lidard, Christa D. ; Hwang, EuiHo
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research) ; WPO (Weather Program Office)
• Description:
  The Modern-Era Retrospective Analysis for Research and Application version 2 (MERRA-2) is a well-established reanalysis dataset and is widely used for driving global-scale hydrological models. However, owing to its relatively coarse spatial resolution (0.5°), the capability of MERRA-2 is repeatedly challenged in regional-scale studies, especially for smaller areas of interest. In addition, the availability of in situ observation data is a pressing issue for generating meteorological forcing. We developed a grid-based high spatial (0.125°) and temporal (hourly) resolution meteorological forcing dataset, which can evaluate hydrological processes in South Korea using state-of-the-art meteorological observations from 1980 to 2020. The forcing dataset was created by combining Automated Synoptic Observing System (ASOS) in situ measurement data from the Korean Meteorological Administration and MERRA-2 reanalysis datasets. Five meteorological variables were provided in the ASOS-MERRA2 (precipitation, air temperature, surface pressure, specific humidity, and wind speed). The study demonstrates that the region-based and high spatial resolution of ASOS-MERRA2 is superior to the existing MERRA-2 with improvements of all five weather variables, for example, from 5.6 to 2.8 mm root mean square error of precipitation. The ASOS-MERRA2 was more capable of reducing the biases and root mean squared error by improving the coefficient of determination compared with MERRA-2 for all five variables. The newly developed ASOS-MERRA2 provides an opportunity to drive land surface models to evaluate the hydroclimatic conditions in South Korea.
• Source:
  Theoretical and Applied Climatology, 153(1-2), 155-172
• DOI:
  https://doi.org/10.1007/s00704-023-04457-6
• ISSN:
  0177-798X ; 1434-4483
• Format:
  PDF
• Publisher:
  Springer Science and Business Media LLC
• Document Type:
  Journal Article
• License:
  https://creativecommons.org/licenses/by/4.0
• Rights Information:
  CC BY
• Compliance:
  Library
• Main Document Checksum:
  urn:sha-512:9001f63574e36b7ed59d5eb2c5136bc3849b0cb030d3330c3aa92dc08a84d9f54eaafb5cd883f597830edcd54960448d1277d095e86fce9ad459d2e09621b3b6
• Download URL:
  https://repository.library.noaa.gov/view/noaa/64649/noaa_64649_DS1.pdf
• File Type:
  [PDF - 5.24 MB ]