洋底地形 的英文怎麼說
中文拼音 [yángdedexíng]
洋底地形
英文
fondoform-
Cryptic species have been found in a wide range of marine organisms ; with majority of them are benthic invertebrates. in contrast, marine holoplanktons are thought to have lower diversity and slow speciation due to their strong dispersal potential. this paper reviewed studies on cryptic species and speciation in marine holoplankton. based on findings in 38 studied taxa, it was concluded that : 1 ) cryptic species are pervasive in marine holoplankton, suggesting holoplankton speciation was more active than previously thought ; 2 ) current morphospecies diversity is untenable to reflect true species diversity in marine holoplankton ; 3 ) geographic isolation may facilitate cryptic speciation of marine holoplankton. however, contribution of allopatric speciation is still questionable ; 4 ) ecological speciation may be the prevailing speciation mode in marine holoplankton. cryptic speciation in marine holoplankton is paradoxical, because rapid speciation under strong gene flow is countertuitive. solution of this paradox will help us gain deep insights of marine speciation and biodivesity
隱種廣泛存在於各類海洋生物中,尤其是底棲無脊椎動物.然而,海洋終生浮游生物由於具有較強的擴散能力,往往被視為生物多樣性低、物種形成慢.本文就海洋終生浮游生物隱種與物種形成的研究作一綜述.基於研究的38個種類,結果表明: 1 )海洋終生浮游生物普遍存在隱種,其物種形成要比想象得快; 2 )由於引種的廣泛存在,形態種生物多樣性無法反映海洋終生浮游生物真正的物種多樣性; 3 )地理隔離有助於海洋終生浮游生物隱種的形成,但異域物種形成的作用仍值得商榷; 4 )生態物種形成很可能是海洋終生浮游生物物種形成的主流模式.海洋終生浮游生物強基因流下快速的物種形成有悖于生物進化常理,解決該悖論將有助於我們對海洋物種形成和生物多樣性的理解This thesis studies each structural layer ' s feature : ( 1 ) structural layer of basement : it is a paleozoic folded basement, whose tectonic deformation and magma intrusion is fiercely, and it is affected by the early hercynian tectonic movement and related to the underthrust and closure ( c1 ) of zhungaer ocean basin and the areal pressing of continents ( c2 - 3 ) ; ( 2 ) structural layer of permian : due to the regional extending and fault depression role in mid - hercynian, it occurred to the combinations of structure and magma in santanghu basin and it ' s periphery area, such as a - granite ' s stock, batholiths and diabase ' s dike. there are many fault depressions possible
按照不同構造層,研究了各構造層的構造特徵:基底構造層:受早海西期構造作用的影響,與準噶爾洋盆俯沖閉合、而後陸-陸碰撞的區域擠壓構造作用有關,為一構造變形和巖漿侵入活動強烈的古生代褶皺基底。二疊系構造層:受中海西區域性伸展斷陷作用的影響,盆地及其周緣地區發育與伸展構造有關的構造-巖漿組合,如呈巖株、巖基狀侵位的a型花崗巖以及呈巖墻狀侵位的輝綠巖等。They differ somewhat from bathymetric charts which are virtually topographic maps of the ocean floor.
它們與水深圖稍有不同,後者實際上是洋底地形圖。A sets of transforms are introduced in this dissertation, by using of which some kinds of topographies, such as continental slope and ridge, can be converted into flat bottom. the processing simplifies the generation of internal tides and reflection of internal waves over those kinds of topographies
針對海洋中的一些地形,如陸架陸坡地形、海山地形、海溝地形,提出了一組坐標變換,該變換可以將這些海底地形變換成平底,從而使得在這些特徵地形上內波的傳播和內潮的產生問題得到很大的簡化。Today enough soundings are available to enable a relief map of the atlantic to be drawn.
今天可以得到足夠的水深資料來繪制大西洋的海底地形圖。Today, enough soundings are available to enable a relief map of the atlantic to be drawn and we know something of the great variety of the sea bed ' s topography
現在已有足夠的水深測量數據來繪制一張大西洋洋底地形圖,而且我對海底地形的千變萬化也有了一定的了解。Through the systematic analysis and contrast studies on topographical environment characteristics of these typical regions, it is found that the hydrothermal activity only occurs under the circumstance of the particular topographical environment, though it distributes widely in the tensional tectonic environment, for instance, the mid - ocean ridges, transform faults zones, back - arc spreading basins and the modern marine craters regions
通過對典型熱液區地形環境特徵的系統分析和對比研究發現盡管現代海底熱液活動廣泛分佈在大洋中脊、轉換斷層、弧后擴張盆地等各種不同的張性構造環境及現代海底火山活動區,但也僅出現在特殊的地形環境條件下。Students of the earth ' s mid - ocean ridge were closely following the incoming data from the galileo mission to jupiter, looking for more hints that an ocean of water - and with it, undersea volcanoes - could exist under the ice that covers jupiter ' s moon europa future interlanetary missions to europa and other promising sites seemed far more likely to find support than they had before mckay ' s announcement
研究地球大洋洋底形成的海脊的學者也在密切注視探索木星的伽利略號飛船傳回的最新信息:在木星的衛星歐羅巴表面冰蓋下面是否存在著海洋及海底火山的跡象,將來飛往歐羅巴及其他可能有生命的地點的星際航行任務可能會帶來更多的新發現,支持地外生命這一假設。The effects of ssc ( small - scale sub - lithospheric convection ) on seafloor topography are investigated by formulating a 2d thermal convection model that is parallel to plate motion
摘要根據建立的垂直於大洋中脊的二維熱對流有限元數值模型,採用常粘性以及與溫度相關的粘性兩種粘性結構對小尺度地幔對流對海底地形的影響進行了重新研究。Surf height depends on the height and steepness of the waves offshore, and to a certain extent on the offshore bottom topography
拍岸浪的高度取決于近岸的高度和陡度,另外,在某種程度上還取決于近岸的洋底地形特徵。During this evolution, seven second - order tectonic units were formed ; from north to south are the mingqianri cretaceous residual sea basin, the arsuo tectonic melange zone, the taricuo - wenbu yenshan magmatic arc belt, the cuoqin - bangduo late paleozoic composite back - arc basin, the jiangrang - geerdi faulted uplift, the gangdise - chazi himalayan magmatic arc belt, and the xigaze - anba fore - arc basin. these units comprise important parts of a poly - arc - basin system and exhibit evolutional features of mesozoic to cenozoic arc - basin systems. mosaic pattern of these tectonic units delineates the lithosphere coupling processes of the gangdise tectonic belt under mechanisms such as back - arc basin attenuation and arc - continent collision
自中新生代以來,岡底斯構造帶經歷了洋殼俯沖、弧陸碰撞、陸內俯沖-碰撞、走滑和塊段隆升的多階段構造演化歷程,形成了由北向南七個二級構造單元,即岷千日白堊紀殘余海盆、阿索構造混雜巖帶、它日錯?文部燕山期巖漿弧帶、措勤?幫多晚古生代復合弧后盆地、江讓?格爾耿斷隆、岡底斯?查孜喜馬拉雅期巖漿弧帶、日喀則?安巴弧前盆地。In the case of the sumatra quake, the seismic fault fan north to south beneath the ocean floor, while the tsunami waves shot out west and east
蘇門答臘地震斷層在洋底自北向南成扇形展開,而海嘯巨浪則自西向東撲向海岸。In this paper, based on the tide, tidal current and ocean wave numerical computing techniques and the constructive method of seabed terrain model, the fusion and visualization of multiple digital marine geographic environmental information for the nearshore marine environmental safeguard are locally realized by using the level of detail model and 3 - d rendering technique, which will provide theoretic and experiential basis for the study field in the future
摘要以潮汐、潮流和海浪數值的計算技術和數字海底地形模型的構造方法為基礎,應用層次細節模型和三維渲染技術,完成了近岸海洋環境保障的多種數字海洋地理環境信息的融合與可視化的局部實現,為今後此領域的研究提供了理論和經驗基礎。The effects of waves transformation, refraction, diffration, reflection and breaking are all due to the depth of water, varying topography, bottom friction, obstacles and current as waves proceed from offshore to near shore regions. some basic parameters which are relevant to the cost of buildings as well as the type of structures are determined by the wave factors since these projects are placed in near shore area, so it is of great importance to study the regularity of wave transforming
外海波浪傳入近岸淺水區受水深、地形、底摩擦、障礙物以及水流等因素的影響,會發生變形、折射、繞射、反射和破碎等各種現象,然而大部分海洋及海岸工程位於近岸地區,該地區的波浪要素將是確定工程造價、建築物型式等最基本的參數,因此研究近岸地區波浪的變化規律具有重要意義。Through analysis, we conclude that washing action of wave and flow is main power of evolvement of region of interest landform, structure lead to the fact that water area around shallow structure in cheng dao sea field has an increase about 0. 3m / a through actual measurement, water depth increase rate around foundation is 0. 25m / a, slope gradient of side slope averagely has a decrease of 5 % o a year, however marine hydropower wash rate through compute is 0. 2m / a on underwater bottom, the wash rate on structure foundation is 0. 35m / a
分析認為,浪流的沖刷作用是研究區水深地形演化的主要動力,構築物的存在,使埕島海域淺水區人工構築物周邊水域實測年水深增加幅度約0 . 3m a ,地基附近水深增加速率0 . 25m a ,邊坡坡度平均每年以5減緩,而計算得出的海洋水動力沖蝕速率在水下底坡為0 . 2m a ,在構築物地基沖蝕速率達0 . 35m a 。Ground - up shells of marine organisms mixed with pebbles, clay and eroded rock, deposited there over many millennia, now form a bed of muddy paste that is so soft and well lubricated that the ice streams can glide along even more easily than earlier researchers expected
有科學家將積冰融化出一公里長的窄洞,採集古老海床的樣本,結果發現地底混雜了海洋生物殼體、礫石、黏土與風化巖,幾千年下來形成又軟又滑的泥床,使冰流較先前研究人員預期的更容易滑動。China will strengthen the comprehensive development and administration of its coastal zones, rationally develop and protect the offshore areas, actively participate in the development and utilization of international seabeds and oceans, and exploit the coastal land and sea areas in a unified way in order to gradually form coastal economic belts and marine economic zones, thus making the coastal areas more prosperous and developed
加強海岸帶的綜合開發和管理,合理開發保護近海,積極參與國際海底和大洋的開發利用;沿海陸地區域和海洋區域一體化開發,逐步形成臨海經濟帶和海洋經濟區,推動沿海地區的進一步繁榮和發展。Some researchers have argued that mars had extensive oceans : images and topographic data hint at shorelines and smooth ocean floors
有些研究人員認為,火星曾有廣大的海洋:影像和地形資料暗示著有海岸線與平緩海底的存在。分享友人