以复杂地形的天津蓟州为例,通过对比距离蓟州最近的大兴探空站资料与欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts, ECMWF)第五代大气再分析(ECMWF Reanalysis v5,ERA5)资料的差异,对基于ERA5资料生成的...以复杂地形的天津蓟州为例,通过对比距离蓟州最近的大兴探空站资料与欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts, ECMWF)第五代大气再分析(ECMWF Reanalysis v5,ERA5)资料的差异,对基于ERA5资料生成的强对流指数在蓟州的适用性进行检验和评估。结果表明:(1)ERA5资料与大兴探空站探测的位势高度、气温和风速在对流层高度吻合,说明ERA5资料能够描述蓟州高空气象条件,且对低空的表现能力比高空准确,各要素中大气湿度的表现相对较差;(2)基于ERA5生成的对流指数中,与强对流天气密切相关的对流有效位能(convective available potential energy, CAPE)、K指数、沙瓦特指数(Showalter index, SI)和大气可降水量(precipitable water, PW)与大兴探空站对应参数的相关系数分别达到0.66、0.90、0.93和0.99,表明利用ERA5构建的对流指数能够揭示大气不稳定层结条件;(3)ERA5对流指数变化与蓟州降水过程相对应,ERA5能够反映天气的变化和发展,为强对流潜势分析提供参考。展开更多
[Objectives] This study aimed to evaluate the quality of Salvia miltiorrhiza cultivated in Jizhou. [Methods] The contents of chemical ingredients( tanshinone ⅡA,tanshinone Ⅰ and salvianolic acid B) in S. miltiorrhiz...[Objectives] This study aimed to evaluate the quality of Salvia miltiorrhiza cultivated in Jizhou. [Methods] The contents of chemical ingredients( tanshinone ⅡA,tanshinone Ⅰ and salvianolic acid B) in S. miltiorrhiza were determined by high-performance liquid chromatography( HPLC),and the chemical composition of S. miltiorrhiza planted in Jizhou and purchased from market was compared.[Results]The contents of tanshinone ⅡA,tanshinone I and salvianolic acid B in S. miltiorrhiza planted in Jizhou were 0. 014%,0. 421 2%and 3. 018%,respectively,higher than the standards of the Chinese Pharmacopoeia of the 2015 edition. [Conclusions]The chemical composition of S. miltiorrhiza planted in Jizhou meets the standards of the Chinese Pharmacopoeia of the 2015 edition.展开更多
文摘为提高区域生态环境质量、维护区域生态系统安全以及推进生态文明建设,以天津市蓟州区为研究区,将生态系统服务价值与生态安全格局相结合,构建生态保护与修复总体空间格局,诊断出修复区域,提出优化策略.结果表明,2011-2021年研究区生态系统服务价值呈现减少趋势;蓟州区生态源地面积为260.67 km^(2),潜在生态廊道34条,其中关键生态廊道共9条,生态节点共65个;构建“一屏两核三廊四区多点”的生态保护与修复总体空间格局,提出差异化的“四区”优化策略;源地修复区的总面积为224.22 km^(2),廊道修复区的总长度为260.69 km.
基金Supported by Tianjin Science and Technology Plan Funding Project(16PTZSTG00020)
文摘[Objectives] This study aimed to evaluate the quality of Salvia miltiorrhiza cultivated in Jizhou. [Methods] The contents of chemical ingredients( tanshinone ⅡA,tanshinone Ⅰ and salvianolic acid B) in S. miltiorrhiza were determined by high-performance liquid chromatography( HPLC),and the chemical composition of S. miltiorrhiza planted in Jizhou and purchased from market was compared.[Results]The contents of tanshinone ⅡA,tanshinone I and salvianolic acid B in S. miltiorrhiza planted in Jizhou were 0. 014%,0. 421 2%and 3. 018%,respectively,higher than the standards of the Chinese Pharmacopoeia of the 2015 edition. [Conclusions]The chemical composition of S. miltiorrhiza planted in Jizhou meets the standards of the Chinese Pharmacopoeia of the 2015 edition.