SPARC Local Workshop on “WCRP Grand Challenges and Regional Climate Change”     

Joowan KIM  Seok-Woo SON  Hye-Jin KIM  Baek-Min KIM  Changhyun YOO 《大气科学进展》2018,35(6):624-627

正1.Overview SPARC(Stratosphere-Troposphere Processes and their Role in Climate)is one of the core projects of the World Climate Research Program(WCRP),coordinating international efforts to address relevant issues in climate and climate prediction via better understanding of the stratosphere-troposphere system.SPARC is a broad umbrella body that  相似文献   

Probabilistic distribution of the maximum wave height     

Dong Hyawn KIM Taerim KIM 《中国海洋工程》2014,28(5):579-586

A new method of treating maximum wave height as a random variable in reliability analysis of breakwater caissons is proposed. The maximum wave height is expressed as the significant wave height multiplied by the so-called wave height ratio.The proposed wave height ratio is a type of transfer function from the significant wave height to the maximum wave height.Under the condition of a breaking wave, the ratio is intrinsically nonlinear. Therefore, the probability density function for the  相似文献   

Evaluation of the twentieth century reanalysis dataset in describing East Asian winter monsoon variability     

张自银  郭文利  龚道溢 《大气科学进展》2013,30(6):1645-1652

The Twentieth Century Reanalysis （20thCR） dataset released in 2010 covers the period 1871-2010 and is one of the longest reanalysis datasets available worldwide. Using ERA-40, ERA-Interim and NCEP-NCAR reanalysis data, as well as HadSLP2 data and meteorological temperature records over eastern China, the performances of 20thCR in reproducing the spatial patterns and temporal variability of the East Asian winter monsoon （EAWM） are examined. Results indicate that 20thCR data： （1） can accurately reproduce the most typical configuration patterns of all sub-factors differences in the main circulation fields over East Asia involved in the EAWM system, albeit with some in comparison to ERA-40 reanalysis data; （2） is reliable and stable in describing the temporal variability of EAWM since the 1930s; and （3） can describe the high-frequency variability of EAWM better than the low-frequency fluctuations, especially in the early period. In conclusion, caution should be taken when using 20thCR data to study interdecadal variabilities or long-term trends of the EAWM, especially prior to the 1930s.  相似文献   

Hydrogeochemical Characteristics of Acid Mine Drainage around the Abandoned Youngdong Coal Mine in Korea     

Hyo–Taek CHON  Ju–Yong KIM  Si–Young CHOI 《Resource Geology》1999,49(2):113-120

Abstract: To determine the geochemical characteristics of the Imgok creek impacted by acid mine drainage (AMD) generated from the abandoned Youngdong coal mine in Korea, chemical analyses of water samples and precipitates and the geochemical modelling of the precipitates were conducted. Acid mine drainage drained from the mine adit and coal refuse piles shows a low pH, high conductivity and high concentrations of Fe, Al, SO₄ and heavy metals such as Co, Cu, Ni and Zn. In the Imgok creek, the concentrations of heavy metals and major cations besides Fe are decreased by dilution, but concentrations of Fe are decreased by the formation of precipitates as well as dilution. From the results of geochemical modelling, goethite is oversaturated, and schwertmannite is the most stable solid phase in the Imgok creek. Yellowish red Fe-precipitates collected at the Imgok creek are recognized as amorphous or poorly crystallized minerals from XRD patterns and Fe_ox/Fe_totratios, and as containing chemically bonded SO₄ and OH by an IR analysis. The mole ratios of Fe/S in these precipitates, which are determined by EPMA, are 5. 1 and 6. 1.  相似文献