呼伦贝尔沙地紫外辐射和太阳总辐射特征

利用呼伦贝尔沙地鄂温克自治旗2019年观测的辐射资料,对该地区的紫外辐射和总辐射进行了初步分析.结果表明:紫外辐射、总辐射年变化位相基本相同,年曝辐量分别为240.33、5 142.41 MJ·m-2,年均日曝辐量分别为0.66、14.09MJ.m-2,紫外辐射年均日曝辐量小于西藏拉萨地区;紫外辐射辐照度和总辐射辐照度...     

乌鲁木齐市旅游形象定位的市场分析

采用问卷调查法对来乌鲁木齐市旅游的国内外游客进行客源市场分析,了解不同的旅游者对乌鲁木齐形象获取信息的途径差异;从不同的旅游者(年龄、性别、收入、文化、地域等因素)在游览乌市前(本底感知形象)后(实地感知形象)对形象描绘词的获选率,了解游客对鲁木齐市旅游形象认知的差异。基于客源市场调查和区域旅游资源特色分析的基础上,了解国内外游客对乌鲁木齐的形象认知现状和形象认知内容。将乌鲁木齐市总体形象定位为“古丝路神秘故城、今西域民族风情”,把“变化的乌鲁木齐、永远的民族家园”作为未来乌鲁木齐形象的最终目标。     

Combined effects of water temperature and copper ion concentration on catalase activity in Crassostrea ariakensis

A central composite experimental design and response surface method were used to investigate the combined effects of water temperature(18–34℃) and copper ion concentration(0.1–1.5 mg/L) on the catalase(CAT) activity in the digestive gland of C rassostrea ariakensis. The results showed that the linear effects of temperature were significant(P 0.01), the quadratic effects of temperature were significant( P 0.05), the linear effects of copper ion concentration were not significant(P 0.05), and the quadratic effects of copper ion concentration were significant(P 0.05). Additionally, the synergistic effects of temperature and copper ion concentration were not significant(P 0.05), and the effect of temperature was greater than that of copper ion concentration. A model equation of CAT enzyme activity in the digestive gland of C. ariakensis toward the two factors of interest was established, with R 2, Adj. R 2 and Pred. R 2 values as high as 0.943 7, 0.887 3 and 0.838 5, respectively. These findings suggested that the goodness of fit to experimental data and predictive capability of the model were satisfactory, and could be practically applied for prediction under the conditions of the study. Overall, the results suggest that the simultaneous variation of temperature and copper ion concentration alters the activity of the antioxidant enzyme CAT by modulating active oxygen species metabolism, which may be utilized as a biomarker to detect the effects of copper pollution.     

基于马尔科夫模型的新疆甘家湖湿地景观格局模拟与预测

以干旱、半干旱区生态脆弱的甘家湖湿地为研究对象,基于2000年和2008年第2期Land-sat TM/ETM为数据源,运用ARCGIS等地理信息系统分析软件,结合实地考察对研究区进行景观分类,确定转移概率矩阵,制作景观格局空间转移格局图,并将马尔科夫过程引入到湿地景观格局的预测和分析,对湿地各景观要素面积进行分析和动态预测。结果表明:①新疆甘家湖湿地功能正在逐步退化,表现于水域面积和沼泽地面积的减小,盐碱地面积不断扩大;②随着对湿地保护的加强,近些年来湿地环境有明显改善,基于马尔科夫模型的预测,在未来的近50年内,沙地面积趋于减少,由2008年的27.4%减少到2060的21.98%,草地面积趋于增加,由2008年的0.6%上升到2060年的1.33%,局部地区的湿地环境有所转好。     

地理国情普查成果在海绵城市中的应用初探

分析比较了地理国情普查成果中相关属性特征和海绵城市建设中相关控制指标,为海绵城市建设提供了新的数据来源,同时也为地理国情普查成果应用拓展了思路,为城市建设的生态文明和可持续发展提供了新想法。     

温度和铜离子浓度对近江牡蛎超氧化物岐化酶活力的联合效应

Superoxide dismutase(SOD) is a crucial antioxidant enzyme playing the first defense line in antioxidant pathways against reactive oxygen species in various organisms including marine invertebrates. There exist mainly two specific forms, Cu/Zn-SOD(SOD1) and Mn-SOD(SOD2), in eukaryotes. SODs are known to be concurrently modulated by a variety of environmental stressors. By using central composite experimental design and response surface method, the joint effects of water temperature(18–34°C) and copper ion concentration(0.1–1.5 mg/L) on the total SOD activity in the digestive gland of Crassostrea ariakensis were studied. The results showed that the linear effect of temperature was highly significant(P0.01), the quadratic effect of temperature was significant(P0.05); the linear effect of copper ion concentration was not significant(P0.05), while the quadratic effect of copper ion concentration was highly significant(P0.01); the interactive effect of temperature and copper ion concentration was not significant(P0.05); the effect of temperature was greater than that of copper ion concentration. The model equation of digestive gland SOD enzyme activity towards the two factors of interest was established, with R2 and predictive R2 as high as 0.961 6 and 0.820 7, respectively, suggesting that the goodness-offit to experimental data be very satisfactory, and could be applied to prediction of digestive gland SOD activity in C. ariakensis under the conditions of the experiment. Our results would be conducive to addressing the health of aquatic animals and/or to detecting environmental problems by taking SOD as a potential bioindicator.     

对原平市区域建设用地集约利用的评价

选择能够反映原平市土地利用状况、土地利用与经济社会发展关系的指标,进行定量评价,进而真实反映原平市的土地利用实际情况。根据利用强度指数、增长耗地指数、用地弹性指数、管理绩效指数等指标计算结果,评价原平市的土地集约利用水平。对评价结果进行综合分析,提出进一步提高原平市城市建设用地集约利用水平的政策建议。     

WRF模式对焦作2008年汛期降水的检验

利用WRF模式2008年6-8月逐日降水预报产品资料,对焦作7站降水预报进行分月分时段的统计检验,结果表明:WRF模式对焦作市0-12 h的晴雨预报能力最强,各月各站均在71%以上,其中6月最高,有6站准确率均在80%以上;12-24 h平均晴雨准确率大部分站都在65%左右.对降水的定量、定性预报能力,前12 h明显优于后12 h;对小雨、中雨预报效果较好,对大雨也有一定的预报能力;对暴雨降水预报能力较差,空报率、漏报率较高.总体看来,模式的空报率、漏报率较高,且空报率大于漏报率.     

河南省一次强寒潮天气诊断分析

利用19712006年许昌地区逐日、逐月、逐年雷暴资料,通过数理统计和小波变换,分析许昌地区雷暴气候特征,结果表明:许昌地区雷暴日数年际变化幅度大,且雷暴日数年代际趋势变化阶段性显著,呈现出一定的波动性;年雷暴日数变化呈略微上升趋势,气候倾向率为0.01个/10a;年平均雷暴日数年际变化存在着准4 a和10 a左右的周期.     

莱州湾南岸平原古湖泊的形成与演变

运用查阅历史文献，地层剖面分析、地名考证，卫片译等多种方法确证了莱州湾南岸古湖泊的存在，同时研究了它的形成与演变过程，莱州湾南岸有巨淀湖，黑冢泊，别画湖等古湖泊，它们形成于距今约6000年以前，系由河口湾泻湖演变而成，该区古湖泊经历了中全新世全盛期和晚全新世收缩期两个阶段，湖泊消亡的原因是气候变干，河道迁移，人类活动影响等，其中河道迁移是是主要原因。