CAJ | 학술논문

以1978年为分界点,对1978年前后的以周为单位的降水集中度和集中期的时空格局和变化趋势进行研究.结果表明：1)中国的降水集中度首先具有明显南北分异规律,其次在中国北部具有明显东西差异；最后,中国整体降水集中度波动呈现减小趋势,且1978年之前波动较大,1978年之后趋于平稳.2)中国的降水集中期主要集中在一年中的第26—30周左右,并在 1978年前后有1~3周不同幅度的滞后和提前,且南方以推迟为主,北方以提前为主；中国整体降水集中期波动呈现微弱减少趋势,且1978年前显著减少,但 1978年后显著增加.
이1978년위분계점,대1978년전후적이주위단위적강수집중도화집중기적시공격국화변화추세진행연구.결과표명：1)중국적강수집중도수선구유명현남북분이규률,기차재중국북부구유명현동서차이；최후,중국정체강수집중도파동정현감소추세,차1978년지전파동교대,1978년지후추우평은.2)중국적강수집중기주요집중재일년중적제26—30주좌우,병재 1978년전후유1~3주불동폭도적체후화제전,차남방이추지위주,북방이제전위주；중국정체강수집중기파동정현미약감소추세,차1978년전현저감소,단 1978년후현저증가.
The year of 1 978 was taken as a dividing point in the study of variations in precipitation concentration degree (PCD)and precipitation concentration period (PCP ).It was found that PCD had a significant north-south pattern,but PCD had a significant east-west pattern in Northern China.Fluctuations in PCD showed a decreasing trend,PCD fluctuations were larger pre-1 978 and smaller post-1 978.PCP mainly fell between 26 and 30 weeks,1-3 weeks of advance or lag were noted.Southern-based PCP mainly postponed, Northern-based PCP advanced.PCP showed a weak decreasing trend,with significant reduction pre-1 978 and significant increase post-1 978.