CAJ | 학술논문

为了研究热源强迫对大气长波调整的作用，利用考虑热源强迫和涡动耗散的β通道准地转正压位涡方程，通过数值计算的方法，揭示了热源强迫及热源强迫下基流和初始场对长波调整的可能影响。结果表明：除了非线性作用和基流的纬向非均匀性外，热源强迫也是长波调整的机制之一。在有热源强迫时，初始波动和热源强迫在纬向结构上的差异是长波出现调整的关键因子。强迫的纬向非均匀性有利于调整的出现，但调整对强迫的经向非均匀性不敏感。基流较大或较小时，都不利于调整现象的发生；而较大的基流切变能够加速调整的出现。热源强迫相同时，初始波动的振幅越小，流场演变越快，波动出现调整的时间就越早；当振幅取较大值时，则情况相反。
위료연구열원강박대대기장파조정적작용，이용고필열원강박화와동모산적β통도준지전정압위와방정，통과수치계산적방법，게시료열원강박급열원강박하기류화초시장대장파조정적가능영향。결과표명：제료비선성작용화기류적위향비균균성외，열원강박야시장파조정적궤제지일。재유열원강박시，초시파동화열원강박재위향결구상적차이시장파출현조정적관건인자。강박적위향비균균성유리우조정적출현，단조정대강박적경향비균균성불민감。기류교대혹교소시，도불리우조정현상적발생；이교대적기류절변능구가속조정적출현。열원강박상동시，초시파동적진폭월소，류장연변월쾌，파동출현조정적시간취월조；당진폭취교대치시，칙정황상반。
To study the effect of thermal forcing on the adjustment of atmospheric long-wave, this paper adopted nu-merical calculation basedβlane quasi-geostrophic potential vorticity equation with consideration of the external heat sources and eddy dissipation to reveal some possible impacts of thermal forcing and heated atmospheric components ( including basic flow and initial wave condition) on the adjustment of long-wave. The result indicates that thermal forcing is another mechanism for the adjustment in addition to non-linear effects and zonal non-uniformity in basic flow. When thermal forcing exists, difference in zonal structures of the initial wave and heating is the key factor leading to the occurrence of the adjustment. The adjustment could be induced by the zonal non-uniform heating, but it is not sensitive to the meridional non-uniform heating. Long-wave has fewer tendencies to present adjustment when basic flow is strong or weak;however, adjustment occurs earlier as the shear in basic flow strengthens. The initial wave amplitude is also correlated with the adjustment. When influenced by the same thermal forcing, the smaller the initial wave amplitude is, the faster the flow field evolves, and the earlier the adjustment occurs. The situation is the opposite with larger amplitude.