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Spatial Variability of the Primary Production and Chlorophyll a Concentration in the Drake Passage in the Austral Spring

机译：南春季德雷克河道初级生产力和叶绿素a浓度的空间变异性

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摘要

The spatial distribution of the primary production (PP) and the chlorophyll a concentration (Chl) were investigated during two research cruises in the Drake Passage area in October-November of 2007 and 2008. The algorithm evaluating the integral PP (PP_(int)) for the water column in this area was developed based on the data on the surface chlorophyll (Chl_s ) and the incident solar irradiance obtained in 2004-2008 in the Atlantic Sector of the Southern Ocean. The results obtained both by the experimental and model approaches suggested that the Polar Front (PF) region of the Drake Passage was characterized by low values of both the PP_(int) (<100 mg C/m~2 per day) and Chl_s (0.08-0.20 mg/m3) in October-November. Low values of the Chl_s and relatively high phaeophytine a concentrations indicated the winter succession state of the phytoplankton community in the Antarctic Ocean and the southern Polar Frontal Zone (PFZ). The seasonal warming of the surface water layers and the developing pycnocline resulted in a phytoplankton bloom and a Chl_s concentration of more than 1 mg/m~3 in mid-November in this area and the Subantarctic waters.
机译：在2007年10月至11月的德雷克通道地区和2008年10月的两次研究航行中，调查了初级产品（PP）和叶绿素a浓度（Chl）的空间分布。评估积分PP（PP_（int））的算法根据2004年至2008年在南大洋大西洋地区获得的地表叶绿素（Chl_s）和入射太阳辐照度的数据，开发了该区域水柱的温度。通过实验和模型方法获得的结果表明，德雷克海峡的极地锋（PF）区域的特征在于PP_（int）（每天<100 mg C / m〜2）和Chl_s（ 0.08-0.20 mg / m3）。 Chl_s的值较低，而Pheophytine a的浓度较高，表明南极海洋和南部极额额带（PFZ）中浮游植物群落的冬季演替状态。在11月中旬，该地区和亚极南极水域的地表水层和不断发展的比克可可的季节性变暖导致浮游植物开花，其Chl_s浓度超过1 mg / m〜3。

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