攀枝花太阳能资源评价

为了有效地开发和利用攀枝花太阳能资源,本文在广泛搜集国内相关地区太阳辐射资料的基础上,整理了攀枝花几十年的太阳能相关气象数据,通过天文辐射量、日照百分率、经纬度、水汽压等因子建立相关辐射量计算模式,系统地分析和研究了攀枝花地区太阳能辐射量的主要分布特征和优势,对大力开发利用攀枝花太阳能资源提供了科学依据,并就如何发展特色农业和旅游业等综合开发利用方面提出了具体可行的对策建议。     

不同采样设计对估计鱼类空间格局指数的影响

查明渔业种群空间格局可为渔业资源的合理利用和管理提供参考依据.在渔业资源调查中,采样设计会影响调查分析结果的准确性和适用性.为查明采样设计对分析种群空间格局的影响,本文根据2016年10月、2017年2月、5月、8月在山东南部近海调查获得的数据,以星康吉鳗(Conger myri-aster)、方氏云鳚(Enedria...     

Annual variation of carbon flux and impact factors in the tropical seasonal rain forest of xishuangbanna,SW China

Two years of eddy covariance measurements of above-and below-canopy carbon fluxes and static opaque chamber and gas chromatography technique measurements of soil respiration for three treatments (bare soil, soil+litterfall, soil+litterfall+seedling) were carried out in a tropical seasonal rain forest. In addition, data of photosynthesis of dominant tree species and seedlings, leaf area index, litter production and decomposing speed, soil moisture, soil temperature and photosynthetic photon flux density within the forest were all measured concurrently. Data from January 2003 to December 2004 are used to present annual variability of carbon flux and relationships between carbon flux and impact factors. The results show that carbon flux of this forest presented unusual tendency of annual variation; above-canopy carbon fluxes were negative in the dry season (November–April) and mainly positive in the rainy season, but overall the forest is a carbon sink. Carbon flux has obviously diurnal variation in this tropical seasonal rain forest. Above-canopy carbon fluxes were negative in the day-time and absolute values were larger in the dry season than that in the rainy season, causing the forest to act as a carbon sink; at night, carbon fluxes were mainly positive, causing the forest to act as a carbon source. Dominant tree species have greater photosynthesis capability than that of seedlings, which have a great effect on above-canopy carbon flux. There was a significant correlation between above-canopy carbon flux and rate of photosynthesis of tree species. There was also a significant correlation between above-canopy carbon flux and rate of photosynthesis of seedlings; however, the below-canopy carbon flux was only significantly correlated with rate of photosynthesis of seedlings during the hot-dry season. Soil respiration of the three treatments displayed a markedly seasonal dynamic; in addition, above-canopy carbon fluxes correlated well with soil respiration, litterfall pro-duction, litterfall decomposition rate, precipitation, and soil moisture and temperature. A primary sta-tistical result of this study showed that above-canopy carbon flux in this forest presented carbon source or sink effects in different seasons, and it is a carbon sink at the scale of a year.

     

西藏中尼公路沿线的泥石流

中尼公路是西藏西南部经济发展的动脉，沿线泥石流灾害严重威胁到线路的正常运营，本研究根据航空照片和卫星图象解译结果，结合现场踏勘校对，深入地研究了沿线700km范围内的环境背景条件和泥石流活动规律，确定沿线有泥石流沟842条，其中沟谷型泥石流沟474条，在公路一侧直接危害公路的沟谷型泥石流241条，深入地探讨了这一高原特殊环境下的泥石流活动特性；为公路部门提供了泥石流防治方案，成为线路整治改建的依据。     

城市区域内不同下垫面的有效辐射特征

本文以低高原城市昆明市为厂家对象，利用城市区域内上气候观测资料，定量地分析了城市区域内不同下垫面的有效辐射特征、变化规律，得到了一些有益的结果，中可为探讨城市区域辐射状况，城市气候形成机制及城市气候的深入研究提供依据。并可为其它地区的研究提供参考。     

一种新的水文地质图件：地下水易污染性图简介

地下水易污染性图是一种新编制的水文地质图件，简要介绍了地下水易污染性图的编制目的与意义，发展史，内容与编制方法和评价方法。     

低纬高原城市昆明的气候特征

以低纬高原城市昆明为研究对象，利用城市内的实测资料与城郊昆明气象站的资料进行了比较研究，分析了城市内外的气候特征、变化规律及其差异，得到了一些有益的结果，可为探讨低纬高原城市气候特征和形成机制、城市环境污染防治及城市建筑的规划、设计提供依据。     

胁迫条件下盐藻β-胡萝卜素及其异构体累积的研究──盐度的影响

于１９８９－１９９１年，在青岛室外对盐藻为实验材料，利用Ｊｏｈｎｓｏｎ改良配方制作增养液，进行盐度（９０－２４０）实验，结果表明，细胞生长的适宜盐度为１２０；当盐度超过１２０－２４０，盐度越高对细胞生长越不利，但越有利于细胞内β－胡罗卜素的累积；适宜于养殖盐藻生产β－胡萝卜素中至少含６种异构体，盐度增加不利于顺式异构体的累积。为生产防癌和延缓衰老等作用更强的顺式异构体，建议生产性养殖时适当降低盐度     

9810号台风过程厦门近岸海域POC的变化特征

本文研究了９８１０号台风影响下九龙江口及厦门西港表层海水颗粒有机碳（ＰＯＣ）的变化特征及其与某些环境因子的关系,除厦门西港低潮水外,台风期间ＰＯＣ含量的迅速增大,此“冲击期”共维持３ｄ后ＰＯＣ值迅速回落,进入“恢复期”。台风期间,九龙江口高低潮,厦门西港高潮表层水ＰＯＣ含量分别为０．７３９、１．３１９和０．８４８ｍｇ／ｄｍ＾３,是非台风状况下的１．１、１．９和１．４倍,陆源有机物的输入和底质再悬浮作用是控制表层水ＰＯＣ含量的主要因素,而厦门西港低潮水ＰＯＣ含量受台风作用影响较小,碎屑ＰＯＣ为厦门近岸海域表层海水ＰＯＣ的主要组成部分。ＰＯＣ与溶解态Ｎ、Ｐ营养盐有一定正相关性,暗示其可能来自颗粒物有机Ｎ、Ｐ的生物降解。     

盐田藻垫生长与环境因子关系的研究

本文研究测定了卤水浓度、营养盐、温度、光照强度、pH等环境因子对盐田藻垫生长的影响。提出了利于藻垫生长的上述环境因子的最适范围及最适点：1．卤水浓度为6—12°Be。2．在无机氮0～8mg／L，无机磷0～0．8mg／L的范围内，藻垫生长随营养盐浓度的增加而增加。3．温度为30℃。4．在自然条件下，光照越强越有利于藻垫生长。5．pH为8．5。