基于不同排放清单的长三角人为CO2排放模拟

目前基于排放清单估算的区域和城市尺度上的人为CO₂排放不确定性较大.为了我国实现碳达峰和碳中和的目标,亟需对我国的区域尺度,特别是大城市群的人为CO₂排放进行准确估算.分别利用两种先验人为CO₂排放数据(EDGAR v6.0清单和EDGAR v6.0联合GCG v1.0的改进清单)作为输入数据,采用WRF-STILT大气传输模型模拟长三角地区2017年12月至2018年2月大气CO₂摩尔分数,再以安徽全椒高塔观测的大气CO₂摩尔分数作为参考值,通过贝叶斯反演方法得到的比例因子改进了模拟结果,并实现了长三角人为CO₂排放通量的估算.结果表明：(1)在冬季,相对于基于EDGAR v6.0模拟的大气CO₂摩尔分数值而言,基于改进清单模拟的大气CO₂摩尔分数与观测值更为一致;(2)模拟的大气CO₂摩尔分数在夜间高于观测值,白天则相反,主要因为排放清单的CO₂排放数据不能表征人为...     

Lobar holoprosencephaly: prenatal MR diagnosis with postnatal MR correlation

Holoprosencephaly is a congenital anomaly characterized by lack of cleavage of the prosencephalon. Although, relatively rare, it is the most common anomaly that involves both the brain and the face. Prenatal diagnosis of this anomaly using ultrasonography, particularly of the less severe forms, is difficult. Magnetic resonance imaging has recently become an important complement to US in prenatal diagnosis of CNS anomalies. We herein report a patient in whom, at 23 weeks of gestation, US suggested agenesis of the corpus callosum and in whom, at 24 weeks of gestation, MRI correctly diagnosed lobar holoprosencephaly, which was confirmed by a postnatal MRI at 3 weeks of age. Copyright © 2005 John Wiley & Sons, Ltd.     

Field demonstration of the combined effects of absorption and evapotranspiration on septic system drainfield capacity.

Drainfields for disposal of septic tank effluents are typically designed by considering the loss of water by either upward evapotranspiration into the atmosphere or lateral and downward absorption into the adjacent soil. While this approach is appropriate for evapotranspiration systems, absorption systems allow water loss by both mechanisms. It was proposed that, in areas where high evapotranspiration rates coincide with permeable soils, drainfield sizes could be substantially reduced by accounting for both mechanisms. A two-year field demonstration was conducted to determine appropriate design criteria for areas typical of the Texas High Plains. The study consisted of evaluating the long-term acceptance rates for three different drainfield configurations: evapotranspiration only, absorption only, and combined conditions. A second field demonstration repeated the experiments for additional observation of the combined evapotranspiration and absorption and achieved similar results as the first study. The field tests indicated that the current design loading criteria may be increased by at least a factor of two for the Texas High Plains region and other Texas areas with similar soil composition and evapotranspiration rates, while still retaining a factor of safety of two.     

Mechanisms of the Formation of Extrazonal Biocenoses on the Solovetskiye Islands

On the Solovetskiye Islands, subtundra forests and forest-tundra crooked forests are considered to be zonal biocenoses, as this region is intersected by the 12°C isotherm for July, which marks the boundary between the northern taiga and forest-tundra zones in northern Europe. The formation of extrazonal tundras on the islands is attributed to the cooling effect of the sea and the prevalence of cold northeasterly winds in the growing period. Herbaceous and herb-bilberry forests similar to their middle-taiga counterparts develop in this region due to a convective heat flow anomaly of high intensity (up to 40–50 W/m²). The phenomenon provides evidence for the existence of an active heat source in the crust under the archipelago. This source is probably a diapir fold involving the upward movement of the mantle.     

Determination of Toxic Pollutants in Water Using A Marine Phytoplankton Dunaliella Bioculata and Doppler Laser Velocimetry

This paper reports an experimental study of the response of the unicellular flagellated algae Dunaliella bioculata to toxic pollutants in water using the 'Doppler laser velocimetry' method. the response to toxic pollutants was encouraging and indicates that Dunaliella bioculata is a good biological model for the detection of toxic pollutants in water.     

The spatiotemporal structure of population in the Muskrat (Ondatra zibethicus)

The spatiotemporal structure of the muskrat population has been studied by means of the prenatal radioactive marking of juveniles with 45 Ca and their subsequent recapture in the test area. The muskrat population is characterized by a cyclic type of spatial structure, with seasonal transition from a mosaic type of settling to a diffuse type and, after the breeding season, vice versa.     

两种生物填料净化城市混合污水的对比分析

本文初步对软性、瑞琪两种填料净化城市混合污水的效果进行比较研究，为进一步深入开展土地快速渗滤技术及处理城市混合污水实用技术的研究提供依据。     

Germination,Growth, and Nodulation of Sesbania rostrata Grown in Pb/Zn Mine Tailings

Sesbania rostrata in pure and amended Pb/Zn tailings. About 90% of seeds of S. rostrata germinated in pure Pb/Zn tailings, which contained high concentrations of Pb, Zn, Cu, and Cd. Although seedling growth suffered from the adverse environment of Pb/Zn tailings, they became established on tailings stands, in the greenhouse, as well as on the actual tailings dam, and completed their life cycle in 4 months. Dry matter production and nitrogen accumulation was 3200 kg/ha and 69.4 kg/ha, respectively in the actual tailings dam. Applying inorganic fertilizer to Pb/Zn tailings led to no obvious improvement in growth and nodulation of S. rostrata, while tailings amended by river sediment or domestic refuse rich in organic matter improved the growth and nodulation of the species. Azorhizobium caulinodans survived and formed N-fixing stem and root nodules in S. rostrata grown in pure Pb/Zn tailings with a nodule biomass exceeding 300 mg fresh matter per plant.