夏季南极长城湾海流变化特征及其对浮游植物生物量的影响
发布时间：2019-04-26 01:25
【摘要】：通过对2010/2011年夏季南极长城湾叶绿素a浓度和海流等环境参数的传感器连续观测,研究其时空变化特征及海流对浮游植物生物量的影响。结果表明,12.9m水层叶绿素a浓度从12月中旬开始增长,直至2月上旬开始维持相对稳定,期间出现两个高值点(2.74μg/L和3.76μg/L)。叶绿素a浓度表现出了24h周期变化特征,每日叶绿素a浓度最高值出现在正午前后时段的概率要高于其他时段。表层海水受西北风影响,流速较大,约为60~100cm/s;中层和底层水体流速较小,约为10cm/s。表层的风海流使海水在长城湾发生辐散,下层海水向上涌升,驱动了水体的垂直交换。长城湾与麦克斯韦尔湾存在水体交换,水体主要从中层进入湾内,从表层输出。长城湾的叶绿素a浓度与流速呈显著负相关,表明低流速环境有利于长城湾浮游植物的生长。
[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.
【作者单位】： 中国极地研究中心国家海洋局极地科学重点实验室;同济大学环境科学与工程学院;
【基金】：南北极环境综合考察与评估专项(CHINARE2016-01-05) 国家高技术研究发展计划(2007AA09Z121)
【分类号】：Q948.8;P731.21
，
本文编号：2465634
[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.
【作者单位】： 中国极地研究中心国家海洋局极地科学重点实验室;同济大学环境科学与工程学院;
【基金】：南北极环境综合考察与评估专项(CHINARE2016-01-05) 国家高技术研究发展计划(2007AA09Z121)
【分类号】：Q948.8;P731.21
，
本文编号：2465634
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