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The influence of typhoon and Kuroshio intrusion process on the natural phytoplankton assemblages in the northeastern South China Sea (neSCS) was examined during a cruise in summer 2017. One hundred ninety-six seawater samples were collected and analyzed in the neSCS. In total, 299 species were identified belonging to 82 genera, mostly dominated by Bacillariophyta (159), followed by Dinophyta (132), Cyanophyta (4) and Chrysophyta (4). Among all, Thalassionema nitzschioides , Thalassionema frauenfeldii , Thalassiosira minima , in Bacillariophyta, Prorocentrum lenticulatum , Prorocentrum compressum in Dinophyta, and Trichodesmium thiebautii , in the Cyanophyta were the most dominated species, respectively. Correlation analysis shows compared with other groups Bacillariophyta was mostly influenced by silicate, whereas, Dinophyta and Cyanophyta showed significant correlation with temperature, salinity, phosphate, and nitrate. After the typhoon, the higher abundance of Dinophyta was observed, whereas it was lower in case of Bacillariophyta and Cyanophyta, shows typhoon “Roke“ and ”Haitang” had a significant influence on the phytoplankton assemblages, which could be manifested by the variations of total phytoplankton abundance in the surface water of neSCS. Overall, our present study provides the latest in-depth information about how the environmental factors influencing the phytoplankton density and diversity in the neSCS during summer.

According to characteristics of solar radiation in hot summer and cold winter climate zone in China, and hot water high demand and cooling load of air conditioning of the inpatient departments in summer, a novel equipment integrating shading and domestic water generation is proposed and analyzed by theoretical and experimental methods, which consists of four parts: Arc sun shading reflecting plates, vacuum heat collecting tubes, domestic water tank and cold water supply unit. An inpatient department located in Changsha city is selected as the experimental site. Three kinds of shading and collecting elements were tested by experiments, key design parameters, such as the cross section size of the shading reflector, the solar radiation intensity, the circulating water flow were evaluated. The results showed that: this novel equipment can absorb 2.5–2.8 times heat when compared with traditional vacuum tube solar collector; in the case study, 100% hot water demand of hospital can be met in summer, 31.7% in transitional seasons and 10.8% in winter; the annual air conditioning energy consumption can be reduced by about 2.7% and the annual electricity savings are estimated.