CAJ | 학술논문

过去的研究结果指出，青藏高原东北侧的伏旱是在副高控制下的干旱，其干旱的典型环流呈上下一致的正压结构。为进一步研究青藏高原东北侧伏旱环流的维持机制，利用一个带有强迫和耗散的球面无辐散准地转正压涡度方程谱模式和经过严格挑选的五个实际典型伏旱个例(共48d)环流场，通过求解平衡方程得到了伏旱环流强迫场，再用该强迫场分别在有强迫和无强迫情形下进行了8d的数值试验。结果表明：伏旱环流的平均维持时间在一周左右，影响和维持它的外界强迫主要来自青藏高原北侧，干旱环流强迫场的存在对干旱环流的维持有重要影响。
과거적연구결과지출，청장고원동북측적복한시재부고공제하적간한，기간한적전형배류정상하일치적정압결구。위진일보연구청장고원동북측복한배류적유지궤제，이용일개대유강박화모산적구면무복산준지전정압와도방정보모식화경과엄격도선적오개실제전형복한개례(공48d)배류장，통과구해평형방정득도료복한배류강박장，재용해강박장분별재유강박화무강박정형하진행료8d적수치시험。결과표명：복한배류적평균유지시간재일주좌우，영향화유지타적외계강박주요래자청장고원북측，간한배류강박장적존재대간한배류적유지유중요영향。
The previous results show that the midsummer drought on thenortheast side of Qinghai-Xizang Plateau is a drought controled by the subtropical latitude high, and the structure of drought circulation displayes a barotropic state. In order to study the maintaining mechanism of the drought circulation, the resultant circulation of 5 typical midsummer drought cases and its forcing field were calculated, and the numerical experiment utilizing a spherical, nondivergent, quasi-geostrophic, barotropic vorticity equation spectral model with forcing and dissipation termes was made. The results show that the mean duration of maintenance of drought circulation is about a week or so, the existence of drougt flow forcing source regions is critical for the maintenance of the drought circulation. The main forcing source region is in the North of Qinghai-Xizang Plateau.