Abstract—

Interannual variability (2002–2018) of primary production, surface seawater temperature (T₀), photosynthetically active radiation (PAR) and ice cover area in the East Siberian Sea (ESS) was studied based on the data of the MODIS-Aqua ocean color scanner. The annual total primary production (PP_tot) decreased by 1.7 TgC over 17 years. The multi-year negative trend in PP_tot was 0.1 TgC y^–1 (1.38% y^–1). The decrease in PP_tot was accompanied by the decrease in the area-specific primary production (IPP). Over the investigated period the annual mean IPP decreased by 13 mgC m^–2 d^–1. The multi-year negative trend in IPP was 0.76 mgC m^–2 d^–1 y^–1 (0.84% y^–1). The decrease in PP_tot and IPP was accompanied by statistically insignificant increase in T₀ (R² = 0.09) and statistically significant decline in PAR (R² = 0.29). Over the 17 years, T₀ in ESS increased by 0.68°С (0.04°С y^–1 or 3.2% y^–1) and PAR declined by 3.4 Ein m^–2 d^–1 (0.2 Ein m^–2 d^–1 y^–1 or 1.9% y^–1). The ice-free area slightly diminished during the study period (R² = 0.10) by 64.94×10³ km². The statistically insignificant negative multi-year trend in the ESS ice-free area was 3.82 × 10³ km² y^–1 (0.87% y^–1). Long-term variability in PP_tot in ESS from 2002 to 2018 depended not only on the decrease in the ice cover but also on PAR level and IPP.

中文翻译：

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东西伯利亚海初级生产的年际变化

摘要—

根据MODIS-Aqua海洋颜色数据，研究了东西伯利亚海初级生产，地表海水温度（T ₀），光合有效辐射（PAR）和冰盖面积的年际变化（2002-2018）。扫描器。在17年中，年度一次总产量（PP _tot）下降了1.7 TgC。PP _tot的多年负趋势是0.1 TgC y ^–1（1.38％y ^–1）。PP _tot的减少伴随着特定地区初级生产（IPP）的减少。在研究期间，年平均IPP降低了13 mgC m ^–2 d ^–1。IPP的多年负趋势为0.76 mgC m ^–2 d ^–1 y ^–1（0.84％y ^–1）。PP _tot和IPP的降低伴随着T ₀的统计学上无意义的增加（R ² = 0.09）和PAR的统计学上显着的下降（R ² = 0.29）。在17年中，ESS中的T ₀增加了0.68°С（y ^–1或0.04°Сy ^–1或3.2％y ^–1），PAR下降了3.4 Ein m ^–2 d ^–1（0.2 Ein m ^–2 d ^–1 y）^–1或1.9％y^–1）。在研究期间，无冰面积略有减少（R ² = 0.10）64.94×10 ³ km ²。ESS无冰地区的多年负数趋势在统计学上不显着，为3.82×10 ³ km ² y ^–1（0.87％y ^–1）。在PP的长期变化_地合计在ESS二○○二年至2018年不仅取决于在冰层覆盖的减少也对PAR水平和IPP。