發(fā)布時(shí)間：2018-01-11 07:37

  本文關(guān)鍵詞：夏季東海陸架區(qū)懸浮體分布特征及其影響因素分析　出處：《中國科學(xué)院研究生院(海洋研究所)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 懸浮體 水團(tuán) 浙江沿岸上升流 躍層 海底沉積環(huán)境

【摘要】：本文依據(jù)2012年6~7月在東海所取得的水文和懸浮體現(xiàn)場(chǎng)調(diào)查資料,對(duì)夏季東海陸架區(qū)水體中懸浮體的分布特征進(jìn)行了系統(tǒng)研究,并探討了水團(tuán)、浙江沿岸上升流、躍層以及海底沉積環(huán)境對(duì)研究區(qū)懸浮體分布的影響。結(jié)果表明:研究區(qū)上層水體(表層~30m)中懸浮體質(zhì)量濃度、懸浮體體積濃度、懸浮體平均粒徑和熒光葉綠素濃度均表現(xiàn)為近岸高、外海低的分布特征,懸浮體有效密度則表現(xiàn)為近岸低、外海高的分布特征。隨深度的增加,懸浮體質(zhì)量濃度總體變化不大,近岸海域懸浮體體積濃度,懸浮體平均粒徑和熒光葉綠素濃度均逐漸降低,懸浮體有效密度則逐漸增大。底層水體中懸浮體質(zhì)量濃度和懸浮體體積濃度均高于上層水體,且近岸高于外海;懸浮體平均粒徑在近岸與外海間呈現(xiàn)一條平行海岸的高值條帶;水體中熒光葉綠素濃度低于上層水體,且近岸高于外海;懸浮體有效密度近岸低、外海高,近岸海域高于上層水體,外海區(qū)低于上層水體。研究區(qū)水體中懸浮體體積濃度和熒光葉綠素濃度的斷面分布表現(xiàn)出良好的相關(guān)性。近岸鹽躍層、外海溫躍層以及受上升流影響的深度范圍內(nèi),水體中懸浮體體積濃度和熒光葉綠素濃度均體現(xiàn)為高值特征;外海上部水體中懸浮體體積濃度和熒光葉綠素濃度均體現(xiàn)為相對(duì)低值,且二者等值線的分布趨勢(shì)總體一致。研究區(qū)懸浮體的分布特征主要受到陸源沖淡水、浙江沿岸上升流、溫躍層和海底沉積環(huán)境的影響,其中陸源沖淡水、浙江沿岸上升流和水體中溫躍層對(duì)研究區(qū)的“疊加”影響是主要因素。夏季陸源沖淡水和浙江沿岸上升流會(huì)給近岸海域帶來豐富的營養(yǎng)鹽,使浮游植物得以大量繁殖;溫躍層的存在則會(huì)造成水體垂向穩(wěn)定度的增加,同樣有利于浮游植物的生長和繁殖;而浮游植物的富集則會(huì)導(dǎo)致水體中懸浮體體積濃度、懸浮體平均粒徑、熒光葉綠素濃度的增大以及懸浮體有效密度的降低。風(fēng)浪和潮流所引發(fā)的海底沉積物的再懸浮作用會(huì)造成底層水體中懸浮體質(zhì)量濃度和懸浮體體積濃度較上層水體呈現(xiàn)為高值,熒光葉綠素濃度較上層水體呈現(xiàn)為低值,同時(shí)底層水體中的大量再懸浮物質(zhì)的存在可能會(huì)造成部分海區(qū)底層懸浮體發(fā)生廣泛的絮凝作用而使懸浮體平均粒徑增大、有效密度降低。
[Abstract]:According to 2012 6~7 obtained in the East China Sea water and suspension of the spot investigation data, the distribution characteristics of suspension water continental shelf of the East China Sea in summer are studied, and discussed the water masses, Zhejiang coastal upwelling, the thermocline and seabed sediment environment on the study area the distribution of suspended matter. The results showed that the study area of upper water (surface ~30m) in suspension concentration, suspension concentration, suspension of average particle size and fluorescence of chlorophyll concentration showed a high distribution of coastal, offshore low, suspension is the effective density distribution of open coastal low. With the increase of depth, the suspension concentration changed little overall, inshore suspension volume the concentration of suspended matter, average particle size and concentration of chlorophyll fluorescence decreased gradually, suspension density gradually increases. The effective concentration of the bottom water in suspension And the suspension volume concentration was higher than that of the upper water and coastal waters off the coast of suspension; average particle size in the nearshore and offshore has a high value of strip parallel to the coast; fluorescence chlorophyll concentration lower than the upper water and coastal waters off the coast of suspension; effective density of coastal low, high sea, coastal waters is higher than that of the upper water. Sea area is lower than the upper section. The water distribution of the water in the study area in suspension concentration and fluorescence of chlorophyll concentration showed a good correlation. The nearshore sea thermocline and halocline, by the effects of upwelling depth range in water suspension concentration and fluorescence of chlorophyll concentration are reflected in the high values of sea water in the upper; the suspension concentration and fluorescence of chlorophyll concentration are relatively low value, the distribution trend and the two contours of the overall distribution in this area. The suspension The main feature is the terrigenous fresh water, Zhejiang coastal upwelling, effects of thermocline and sea sedimentary environment, the terrigenous fresh water, Zhejiang coastal upwelling and the thermocline on the "superposition" is the main factor affecting the summer. Terrigenous diluted water and Zhejiang coastal upwelling will bring abundant nutrients to coastal waters the phytoplankton to multiply; thermocline water will cause the increase of the vertical stability, is also conducive to the growth and reproduction of phytoplankton; while phytoplankton enrichment will lead to concentration of suspension in water suspension volume, average particle size, the concentration of chlorophyll fluorescence and the increase of effective density reduced. Suspension caused wave tide and sediment resuspension caused by bottom water in suspension concentration and suspension volume concentration is present in the upper water High value, fluorescence chlorophyll concentration is lower than upper layer water. Meanwhile, the presence of a large number of re suspended substances in bottom water may cause extensive flocculation of suspended solids in the bottom of some sea areas, which will increase the average particle size and decrease the effective density of suspended solids.

【學(xué)位授予單位】：中國科學(xué)院研究生院(海洋研究所)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P734.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 浦泳修;夏季長江沖淡水?dāng)U展機(jī)制的初析[J];東海海洋;1983年01期

2 雷坤,楊作升,郭志剛;東海陸架北部泥質(zhì)區(qū)懸浮體的絮凝沉積作用[J];海洋與湖沼;2001年03期

3 寧修仁,史君賢,劉子琳,陳忠元,劉鎮(zhèn)盛;長江口及浙江近海夏季葉綠素a和ATP的分布特征[J];海洋學(xué)報(bào)(中文版);1986年05期

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本文編號(hào)：1408691