CAJ | 학술논문

基于 RADARSAT 地球物理处理器系统（RGPS）的北极海冰运动散度、旋度和剪切产品，本文计算了北极海冰总形变率，给出了所有 RGPS 产品时空覆盖范围的总形变率空间分布和时间平均总形变率大于0．01 d－1的概率分布。结果表明：对整个 RGPS 数据库而言（时间跨度从1996年11月至2008年4月），平均总形变率为0．0204 d－1，总形变率大于0．01 d－1的数据样本为总样本的45．89％。总形变率高值主要分布在近岸海域，靠近北极点附近的总形变率相对较小。北极海冰总形变率随季节变化，夏季平均总形变率及总形变率大于0．01 d－1发生概率要比冬季大，其中，夏季总形变率大于0．01 d－1发生概率为59％，而冬季要比夏季低18％。其可能机制主要是，夏季北极地区温度升高，形成海冰融化－破碎－更易融化－更易破碎的放大效果，导致北极海冰总形变率变大。
기우 RADARSAT 지구물리처리기계통（RGPS）적북겁해빙운동산도、선도화전절산품，본문계산료북겁해빙총형변솔，급출료소유 RGPS 산품시공복개범위적총형변솔공간분포화시간평균총형변솔대우0．01 d－1적개솔분포。결과표명：대정개 RGPS 수거고이언（시간과도종1996년11월지2008년4월），평균총형변솔위0．0204 d－1，총형변솔대우0．01 d－1적수거양본위총양본적45．89％。총형변솔고치주요분포재근안해역，고근북겁점부근적총형변솔상대교소。북겁해빙총형변솔수계절변화，하계평균총형변솔급총형변솔대우0．01 d－1발생개솔요비동계대，기중，하계총형변솔대우0．01 d－1발생개솔위59％，이동계요비하계저18％。기가능궤제주요시，하계북겁지구온도승고，형성해빙융화－파쇄－경역융화－경역파쇄적방대효과，도치북겁해빙총형변솔변대。
Total sea ice deformation rates are produced based on RADARSAT Geophysical Processer System (RGPS)dataset (divergence,vorticity and shear)in this paper,as well as the probability distribution of samples whose value of total sea ice deformation rate are lager than 0.01/d in the Arctic Ocean.The results show that mean value of total deformation rates (TDR)of whole dataset (from November 1996 to April 2008)is 0.020 4/d. There are 45.89% samples whose value of TDR are lager than 0.01/d.TDR in coast area are larger than those near North Polar.There are statistically significant differences in the average TDR between summer and winter. Both average TDR and occurrence probabilities of samples whose value of TDR are lager than 0.01/d in summer are larger than those in winter.Where probability of occurrence in summer is 59% which has 18% more than that in winter.It may be lead by the amplify effect of sea ice melting-broken-easier melting-easier broken in summer, and than it makes the Arctic sea ice TDR larger than in winter.