Based on the 3-D Earth model, the common convert points-phase weighted stacks (CCP-PWS) migra- tion method is used to image the upper mantle discontinuities beneath Northeast China (longitude 120°―132°; lat...Based on the 3-D Earth model, the common convert points-phase weighted stacks (CCP-PWS) migra- tion method is used to image the upper mantle discontinuities beneath Northeast China (longitude 120°―132°; latitude 38°―40°) with 802 observed receiver functions. Teleseismic records are obtained from 4 stations belonging to CCDSN and 19 stations belonging to PASSCAL. A low-velocity layer has been detected at the depth of 620 km. This low-velocity layer rises to 600 km in the east of the study region close to the subducted slab. We consider that this low-velocity layer might be the accumulated oceanic crustal material delaminated from the western Pacific subducted slab. Additionally, we detect the obvious depression of 660 km discontinuity which was attributed to the interaction between the upper mantle and subducted slab. The maximum depth of 660 km discontinuity approaches 700 km, and 660 km discontinuity splits into multiple discontinuities in the northeast of the study region.展开更多
全球变暖背景下的陆海温差研究南京大学地理与海洋科学学院邹欣庆教授课题组以海岸线为界,向陆海各缓冲200千米作为研究区,将中国海岸带划分为渤海,黄—东海和南海3个区域;利用ERA-Interim再分析资料和18个CMIP5气候模式数据,分析了中...全球变暖背景下的陆海温差研究南京大学地理与海洋科学学院邹欣庆教授课题组以海岸线为界,向陆海各缓冲200千米作为研究区,将中国海岸带划分为渤海,黄—东海和南海3个区域;利用ERA-Interim再分析资料和18个CMIP5气候模式数据,分析了中国海岸带当前(1979年—2014年)和未来(2005年—2100年)陆海温差时空变化特征。研究成果发表于Journal of Geophysical Research:Atmospheres。1979年—2014年,陆海温差在夏季有明显变化,渤海和黄—东海区域以1998年为界,先下降后增加;展开更多
基金Supported by the National Natural Science Foundation of China (Grant Nos. 40574024 and 40374009)
文摘Based on the 3-D Earth model, the common convert points-phase weighted stacks (CCP-PWS) migra- tion method is used to image the upper mantle discontinuities beneath Northeast China (longitude 120°―132°; latitude 38°―40°) with 802 observed receiver functions. Teleseismic records are obtained from 4 stations belonging to CCDSN and 19 stations belonging to PASSCAL. A low-velocity layer has been detected at the depth of 620 km. This low-velocity layer rises to 600 km in the east of the study region close to the subducted slab. We consider that this low-velocity layer might be the accumulated oceanic crustal material delaminated from the western Pacific subducted slab. Additionally, we detect the obvious depression of 660 km discontinuity which was attributed to the interaction between the upper mantle and subducted slab. The maximum depth of 660 km discontinuity approaches 700 km, and 660 km discontinuity splits into multiple discontinuities in the northeast of the study region.
文摘全球变暖背景下的陆海温差研究南京大学地理与海洋科学学院邹欣庆教授课题组以海岸线为界,向陆海各缓冲200千米作为研究区,将中国海岸带划分为渤海,黄—东海和南海3个区域;利用ERA-Interim再分析资料和18个CMIP5气候模式数据,分析了中国海岸带当前(1979年—2014年)和未来(2005年—2100年)陆海温差时空变化特征。研究成果发表于Journal of Geophysical Research:Atmospheres。1979年—2014年,陆海温差在夏季有明显变化,渤海和黄—东海区域以1998年为界,先下降后增加;
