CAJ | 학술논문

利用黄河源区气候与环境综合观测研究站2006年10月1日～2007年4月30日的辐射和5cm土壤温度和湿度资料研究了土壤冻融对地表辐射特征的影响,结果表明:土壤冻结降低了土壤中的液态水含量,致使冻结阶段地表反照率大于冻结前的值,也大于土壤融化后的值;受总辐射和地表反照率共同作用,整个冻融过程中反射辐射可区分为两个比较明显的阶段;土壤冻结减缓了地表温度降低的速率,相应地减缓了地表长波辐射和大气逆辐射降低的速率;整个冻融过程中净辐射变化与总辐射的变化比较相近,在冻结阶段,地表反照率大于冻结前的值,也大于融化后的值,因此冻结阶段的净辐射值也更小一些.
이용황하원구기후여배경종합관측연구참2006년10월1일～2007년4월30일적복사화5cm토양온도화습도자료연구료토양동융대지표복사특정적영향,결과표명:토양동결강저료토양중적액태수함량,치사동결계단지표반조솔대우동결전적치,야대우토양융화후적치;수총복사화지표반조솔공동작용,정개동융과정중반사복사가구분위량개비교명현적계단;토양동결감완료지표온도강저적속솔,상응지감완료지표장파복사화대기역복사강저적속솔;정개동융과정중정복사변화여총복사적변화비교상근,재동결계단,지표반조솔대우동결전적치,야대우융화후적치,인차동결계단적정복사치야경소일사.
Using the observations of radiation, soil temperature and moisture from Oct. 1, 2006 to Apr. 30, 2007 in Maqu station, the effects of soil freezing and thawing on surface radiation were analyzed. The main results showed that volumetric soil liquid water content comes down rapidly when soil freezing happened caused surface albedo to raise. The change of surface reflection radiation can be divided into two different phases. Surface temperature, upward longwave ra-diation and downward longwave radiation represent decreasing tendencies, this decreasing becomes gently when soil freez-ing happened . Net radiation and global radiation shared similar changes.