Spatial variations in dissolved inorganic nutrients in the groundwaters along the Indian coast and their export to adjacent coastal waters

Impact of atmospheric anthropogenic nitrogen on new production in the northern Indian Ocean: constrained based on satellite aerosol optical depth and particulate nitrogen levels

“…The higher concentrations of nutrients, by an order of magnitude, were reported in groundwater than in coastal waters. 63 The SGD flux of dissolved inorganic nitrogen was estimated to be 0.06 ± 0.03 and 0.102 ± 0.02 TgN per year to the AS and BoB, which supports 0.4 ± 0.2 and 0.7 ± 0.1 TgC per year of new production, respectively.…”

“…Environmental Science: Processes & Impacts Paper reported in groundwater than in coastal waters. 63 The SGD ux of dissolved inorganic nitrogen was estimated to be 0.06 AE 0.03 and 0.102 AE 0.02 TgN per year to the AS and BoB, which supports 0.4 AE 0.2 and 0.7 AE 0.1 TgC per year of new production, respectively. The estimated long-term mean (2001-2020) ux of atmospheric nitrate and ammonium varied between 0-1.8 and 0-0.3 mg N m À2 day À1 in the northern Indian Ocean, respectively, with higher rates in the western BoB and eastern AS.…”

“…14,16,[58][59][60] The primary source of dust to the northern Indian Ocean comes from the Nubian desert, the Arabian Peninsula, Iran, Pakistan, Afghanistan and north-west India with maximum activity between May and October. [61][62][63][64] The fraction of the AAOD to the total AOD was higher during winter and spring (November-April; 60-70%) than in summer (30-40%) over the northern Indian Ocean due to the inux of anthropogenic rich aerosols derived from the surrounding continents where >30% of the global population dwells. 21,65 The perennial high levels of AAOD were observed along the Indian coast with the rate of increase being the highest across the globe, 20,21 which was attributed to a signicant increase in the contribution of anthropogenic emissions from the Indo-Gangetic Plain (IGP) and southeast Asia.…”

“…An episodic increase in phytoplankton blooms associated with dust storms was reported in the northern Indian Ocean and attributed to the deposition of atmospheric nutrients. 8,[34][35][36]63 Severe nitrogen limitation to primary production was reported in the northern Indian Ocean. 26,27,68 Assuming that the deposited inorganic nitrogen (nitrate and ammonium) on the surface ocean is completely utilized by the phytoplankton, it may support a primary production of 0-18.5 mg C m À2 day À1 in the northern Indian Ocean (Fig.…”

Nutritional Status Regulates Bacteria‐Virus Interactions in the Northern South China Sea

“…The Winker method is most often used to determine BR (Kumar et al., 2021; Xu et al., 2018). The Winker‐based BR was obtained by the difference in DO concentration between the beginning and the end of the 24 hr incubation in this study.…”