Temporal and spatial variations of sea surface temperature anomalies in the global and three oceans in recent 50 years 全球和三大洋海溫距平的時空變化特征
The temporal and spatial variations of each stable variable in jiaozhou bay for summer 2001 is simulated 模型將氮、磷及與其相關(guān)的浮游植物、浮游動物作為狀態(tài)變量,模擬了膠州灣海域夏季各狀態(tài)變量濃度的時空分布。
Objective to analyze the temporal and spatial variations of radon concentration by measuring in some labs and typical buildings in chengdu 摘要目的通過對成都某幾個氡氣觀測實驗室以及代表性建筑物的氡濃度測量,分析氡濃度的時間變化特點和垂直變化特點。
Based on the sst data , the temporal and spatial variations of ssta in western pacific warm pool region have been analyzed in this paper by means of eof 本文通過對夏季熱帶西太平洋暖池區(qū)ssta的eof分析,發(fā)現(xiàn)夏季暖池區(qū)海溫存在兩種主要空間分布型,即ssta的一致性分布和南北半球反對稱分布。
The paper is mainly based on geography , ecology , sight ecology , region location theory and system theory . by interpreting the mss remote sensing image of 1970s and the tm remote sensing image of 1980s and the end of 1990s in keerqin sandlot based on background database and expert information , we have achieved the three periods vector data of land desertification of the research area , then we have disposed the data property by using the powerful spatial analysis function of arc / info and achieved the information extraction and analysis supported by arcview and erdas imagine . thus the rule of temporal and spatial variation of land desertification in keerqin sandlot is researched and the blueprint and countermeasures of the prevention and treatment of land desertification in keerqin sandlot are put forward 本研究主要以地理學(xué)、生態(tài)學(xué)、景觀生態(tài)學(xué)、區(qū)位論和系統(tǒng)論為主要理論支持,通過對科爾沁地區(qū)20世紀(jì)70年代的mss遙感影像、 20世紀(jì)80年代和90年代末tm遙感影像進(jìn)行基于背景數(shù)據(jù)庫和專家知識的解譯,獲得科爾沁研究區(qū)土地沙漠化的三期矢量數(shù)據(jù),利用arc / info軟件強(qiáng)大的空間分析功能對屬性進(jìn)行處理,并在arcview 、 erdasimagine軟件的支持下進(jìn)行信息提取與分析,研究了科爾沁沙地土地沙漠化時空變化的規(guī)律,提出了科爾沁沙地土地沙漠化防治的構(gòu)想與對策。