本文選題：渤海 + ROMS模式�。� 參考：《海洋與湖沼》2017年03期

【摘要】：通過計(jì)算黃河淡水在渤海內(nèi)部的水齡變化,能夠進(jìn)一步了解由黃河口排出的溶解性污染物在渤海中的輸運(yùn)時間和分布規(guī)律。利用ROMS(Regional Ocean Modeling System)數(shù)值模型,加入了基于CART(the constituent-oriented age and residence time theory)方法計(jì)算水齡的模塊,用于計(jì)算黃河淡水水齡在渤海的分布以及長期變化規(guī)律。模式較好地再現(xiàn)了渤海物理場以及黃河淡水水齡在渤海中的分布。模擬結(jié)果顯示水齡在空間分布上差異很大,萊州灣平均水齡為700天,而遼東灣則高達(dá)1760天。渤海中部與遼東灣水齡時空分布表現(xiàn)出季節(jié)變化,冬季遼東灣水齡西低東高,高齡水自遼東灣東側(cè)入侵渤海中部;夏季遼東灣水齡西高東低,渤海中部低齡水占優(yōu)。黃河淡水水齡在年際時間尺度上存在明顯差異,1998—2003年黃河淡水水齡較高且存在上升趨勢,而2003—2007年則迅速下降,此變化主要由黃河入海徑流量的改變導(dǎo)致;徑流量增大會使淡水水齡降低,反之則會使水齡升高。黃河徑流量對黃河淡水水齡的影響主要是通過改變目標(biāo)區(qū)域黃河淡水濃度和低齡淡水質(zhì)點(diǎn)在水團(tuán)中所占的比例來實(shí)現(xiàn)的。
[Abstract]:By calculating the changes in the water age of the Yellow River fresh water in Bohai, we can further understand the transport time and distribution of dissolved pollutants discharged from the Yellow River Estuary in Bohai. By using the ROMS (Regional Ocean Modeling System) numerical model, the method based on CART (the constituent-oriented age and residence time) method is added. The module of water age is used to calculate the distribution of the Yellow River fresh water age in Bohai and the law of long-term change. The model reproduces the distribution of Bohai physical field and the Yellow River fresh water age in Bohai. The simulation results show that the spatial distribution of water age is very different, the average water age of the Laizhou Bay is 700 days, while the eastern Liaodong Bay is up to 1760 days. The time and space distribution of water age in central and Liaodong Bay shows a seasonal variation. The water age of Liaodong Bay in winter is lower in the West and East in the east of the Liaodong Bay. The water age of the Liaodong Bay is in the middle of Bohai, the water age of Liaodong Bay is low in the West and the low age water in the middle of Bohai is dominant in the summer. The fresh water age of the Yellow River is obviously different on the interannual time scale, and the freshwater water of the Yellow River is higher in 1998 to 2003. And there is a rising trend, and the change from 2003 to 2007 is rapidly decreasing. This change is mainly caused by the change in the flow of the Yellow River into the sea. The increase of the runoff will reduce the age of fresh water, and on the contrary, it will increase the age of water. The influence of the Yellow River runoff on the freshwater age of the Yellow River is mainly by changing the fresh water concentration of the Yellow River and the fresh water quality of the low age in the target area. The proportion of the water masses is achieved.
【作者單位】： 中國海洋大學(xué)海洋與大氣學(xué)院海洋學(xué)系;中國海洋大學(xué)物理海洋教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目,41276013號,41576004號,U1406401號 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)項(xiàng)目,2014CB7450001號
【分類號】：P731
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本文編號：1901620