【摘要】：通過對2010/2011年夏季南極長城灣葉綠素a濃度和海流等環(huán)境參數(shù)的傳感器連續(xù)觀測,研究其時空變化特征及海流對浮游植物生物量的影響。結(jié)果表明,12.9m水層葉綠素a濃度從12月中旬開始增長,直至2月上旬開始維持相對穩(wěn)定,期間出現(xiàn)兩個高值點(2.74μg/L和3.76μg/L)。葉綠素a濃度表現(xiàn)出了24h周期變化特征,每日葉綠素a濃度最高值出現(xiàn)在正午前后時段的概率要高于其他時段。表層海水受西北風影響,流速較大,約為60~100cm/s;中層和底層水體流速較小,約為10cm/s。表層的風海流使海水在長城灣發(fā)生輻散,下層海水向上涌升,驅(qū)動了水體的垂直交換。長城灣與麥克斯韋爾灣存在水體交換,水體主要從中層進入灣內(nèi),從表層輸出。長城灣的葉綠素a濃度與流速呈顯著負相關(guān),表明低流速環(huán)境有利于長城灣浮游植物的生長。
[Abstract]:The environmental parameters such as chlorophyll a concentration and ocean current in the Great Wall Bay of Antarctica in summer 2010 / 2011 were continuously observed by sensors to study the temporal and spatial variation characteristics of chlorophyll a and the effects of ocean currents on phytoplankton biomass. The results showed that the chlorophyll a concentration in the 12.9m water layer increased from mid-December to the beginning of early February, and there were two high-value points (2.74 渭 g / L and 3.76 渭 g / L). The concentration of chlorophyll a showed a 24-hour cycle change, and the probability of the highest value of chlorophyll-a concentration appeared in the noon period was higher than that in the other periods. The surface water is affected by the northwest wind and the velocity is about 60 脳 100 cm / s, while that of the middle and bottom water is smaller (about 10 cm / s). The surface wind current causes the sea water to diverge in the Great Wall Bay, and the lower sea water rises upward, driving the vertical exchange of the water body. There is water exchange between the Great Wall Bay and Maxwell Bay. The water body mainly enters into the bay from the middle layer and outputs from the surface layer. The concentration of chlorophyll a in the Great Wall Bay was negatively correlated with the velocity of flow, which indicated that the low velocity environment was beneficial to the growth of phytoplankton in the Great Wall Bay.
【作者單位】： 中國極地研究中心國家海洋局極地科學重點實驗室;同濟大學環(huán)境科學與工程學院;
【基金】：南北極環(huán)境綜合考察與評估專項(CHINARE2016-01-05) 國家高技術(shù)研究發(fā)展計劃(2007AA09Z121)
【分類號】：Q948.8;P731.21
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本文編號：2465634