CAJ | 학술논문

利用1961-2010年中国东北三省和内蒙古四盟90个气象站逐日降水资料，分析了东北地区降水事件的气候特征及时空分布均匀性变化。结果表明：近50 a来，东北地区年降水量略有减少，但冬、春季降水量显著增加；考虑降水日数，冬、春季降水量增加主要由于降水强度的增加，夏、秋季降水量减少主要由于降水频次的减少。气候变暖的大背景下，虽然年降水量线性变化趋势并不明显，但降水量年际间分布不均匀性增加，降水有向极端化发展的趋势，夏、秋季表现更为明显，各等级降水事件尤其是降雪在近20 a时间分布明显不均匀。降水量空间均匀性在1993年发生转折突变，突变后空间不均匀性增加，降水日数空间均匀性在1986年发生变率突变，突变后振荡加剧。降水事件时空不均匀性的增加一定程度上造成了东北地区旱涝事件发生的可能性增加，不同地域旱涝事件同发现象加剧。
이용1961-2010년중국동북삼성화내몽고사맹90개기상참축일강수자료，분석료동북지구강수사건적기후특정급시공분포균균성변화。결과표명：근50 a래，동북지구년강수량략유감소，단동、춘계강수량현저증가；고필강수일수，동、춘계강수량증가주요유우강수강도적증가，하、추계강수량감소주요유우강수빈차적감소。기후변난적대배경하，수연년강수량선성변화추세병불명현，단강수량년제간분포불균균성증가，강수유향겁단화발전적추세，하、추계표현경위명현，각등급강수사건우기시강설재근20 a시간분포명현불균균。강수량공간균균성재1993년발생전절돌변，돌변후공간불균균성증가，강수일수공간균균성재1986년발생변솔돌변，돌변후진탕가극。강수사건시공불균균성적증가일정정도상조성료동북지구한로사건발생적가능성증가，불동지역한로사건동발현상가극。
Based on the daily precipitation data from 90 weather stations in the northeast China during 1961-2010, the climatic characteristics of precipitation events and its temporal and spatial homogeneity were analyzed.The re-sults indicate that the annual precipitation is in a slightly decreasing trend,while winter and spring precipitation in-creases significantly.The increase of precipitation in spring and winter is mainly associated with the increase of precipitation intensity,while the decrease of precipitation in summer and autumn is with the decrease of precipitati-on frequency in terms of the number of precipitating days.Although a linear trend of annual precipitation is not sig-nificant,the inhomogeneity of the inter-annual precipitation increases.There is a trend that precipitation tendency is moving towards extreme direction,especially in summer and autumn.The inter-annual precipitation events in vari-ous grades are inhomogeneous,especially for snowfall events in the last 20 years.The spatial homogeneity of annu-al precipitation shows an abrupt change in 1993,while that of annual precipitation days is in 1986.After the abrupt change,the spatial inhomogeneity of the former increases and homogeneity of the latter fluctuates significantly.The variation of precipitation events is likely to increase the risks of flood and drought in the northeast China,so is the events that flood in some regions and drought in other regions occur simultaneously.