临沂市国土资源局

临沂市国土资源局在省国土资源厅和市委、市政府的正确领导下，坚持以邓小平理论和“三个代表”重要思想为指导，以科学发展观统揽全局，深入贯彻落实国务院《决定》要求，紧紧围绕全市建设“大临沂、新临沂”的中心工作，积极服从和服务于经济和社会发展大局。以优化土地矿产市场配置为手段，以管理体制、工作机制创新为动力。以实施突出重点、提升亮点、     

1ES1853-379的EGRET观测上限对其自转参数的限制

给出了来自新发现的孤立中子星１ＥＳ１８５３－３７９方向的γ射线上限为５×１０－８ｐｈｃｍ－２ｓ－１．假设γ射线辐射的立体角的成束和１ＧｅＶ的平均光子能量,对应的１光度上限为７．６×１０~２３（Ｄ／１００ｐｃ）２Ｊ／ｓ．导出的γ射线辐射效率上限比极冠模型或外间隙模型所预期的辐射效率低两个量级．由此给出了这一中子星自转参数的限制．     

广西地区地震动衰减Q值和场地响应研究

根据2007-2013年广西数字测震台网21个地震台的665条波形资料,运用三段几何衰减模型,采用Akinson方法多台多地震联合反演,得到广西地区非弹性衰减Q值,利用Moya方法进行台站的场地响应测算.结果表明:广西地区非弹性衰减Q值和频率f线性关系较好,Q(f)=366.3f0.47;其中10个台站的场地响应在1附近,且随频率变化波动小;百色、桂林、梧州地震台场地响应随着高频增加而缓慢降低;钦州地震台低频部分较为平坦,高频部分有较为明显的放大效应;河池地震台低频部分较为平坦,在频率7 Hz以上快速下降;南宁地震台仪器通带范围的能量场地响应有明显的放大效应.     

Research progress on methylmercury in the cryosphere北大核心CSCD

The cryosphere is one of the climate system component which plays an important role in the global biogeochemical mercury cycling. Anthropogenic mercury has been transported to remote cold and high regions worldwide through atmospheric circulation,and then transformed into methylmercury in the cryosphere. As one of the highly toxic environmental pollutants,methylmercury can be greatly bioaccumulated and biomagnified through the food web,which potentially poses threats to human and wildlife as well as the global cryospheric en⁃ vironments. In order to gain a full picture of research progress on methylmercury in the cryosphere,our study comprehensively summarized the concentration levels and analytical methods of methylmercury,and biogeo⁃ chemical processes such as the migration,transformation and fate of methylmercury in various cryospheric envi⁃ ronments including glacier,permafrost,snow ice and sea ice. We particularly made the literature review of mi⁃ crobial mercury methylation and evaluated the risk of methylmercury exposure to human and wildlife in the cryo⁃ sphere. Meanwhile,we focus on distribution,behavior,and environmental effects of methylmercury in the cryosphere against the backdrop of climate change,which is essential for assessing the exposure risk of methyl⁃ mercury to humans and wildlife. Perspectives of methylmercury researches in the cryosphere have also been highlighted in this review,though there is existing a knowledge gap of biogeochemical methylmercury cycling in the low temperature environments which merits further study. © 2023 The Author(s).