Biogeochemical cycles of carbon transformation throughout the euphotic zone sea are controlled by physical processes, e.g., daily thermocline, variation in solar irradiance, thermohaline convection, and intermittent mixing. These processes should be regularly observed with sufficient time resolution at fixed geographical locations. This study provides a brief overview observational site Northea...

[1] The influence of nearshore wind stress curl on the relative partitioning of bottom boundary layer (BBL) and interior transport within an idealized, two-dimensional coastal upwelling system is studied theoretically and using a numerical model. A nearshore reduction in upwelling favorable wind stress amplitude (1) reduces the width of the inner shelf, (2) reduces the local wind-driven Ekman t...

Vertical variations of bacterial community composition in the South China Sea was investigated on 18 September 2009 by denaturing gradient gel electrophoresis (DGGE) and analyzed by multivariate analysis. Twenty-seven sequences retrieved from DGGE bands fell into five groups based on BLAST analysis. The dominant bacteria were Cyanobacteria (35.7%) and Proteobacteria (39.2%). The DGGE profile sh...

Abstract In Monterey Bay, CA, during northwesterly, upwelling favorable winds, the development of a southward flowing cold jet along the entrance to the Bay is often observed. This dense cold jet separates warm waters of the anticyclonic circulation offshore from the water masses inside the Bay. Interactions between the cold jet and the offshore anticyclonic circulation generate ageostrophic se...

Observations that the majority of silica dissolution occurs within the upper 200 m of the ocean, and that sedimentation rates of diatom frustules generally do not decrease significantly with depth, suggested reduced dissolution rates of diatoms embedded within sinking aggregates. To investigate this hypothesis, silica dissolution rates of aggregated diatom cells were compared to those of disper...

The particle size distribution (PSD) is a critical aspect of the oceanic ecosystem. Local variability in the PSD can be indicative of shifts in microbial community structure and reveal patterns in cell growth and loss. The PSD also plays a central role in particle export by influencing settling speed. Satellite-based models of primary productivity (PP) often rely on aspects of photophysiology t...

Products derived from remote sensing reflectances ( R rs ? $$ {R}_{\mathrm{rs}}\left(\lambda \right) ), for example, chlorophyll, phytoplankton carbon, euphotic depth, or particle size, are widely used in oceanography. Problematically, may have fewer degrees of freedom (DoF) than measured wavebands products. Here, we show that a global sea surface hyperspectral dataset has DoF = 4. MODIS-like m...

Total sedimentation and the fraction due to copepod fecal pellets were measured during the growth season (March-October 1989) in the southern Kattegat, Denmark. In this period the sedimentation of detritus made up 52 g C rn-‘, equal to 82% of the sedimenting matter from the euphotic zone, but fecal pellets (11 g C mpZ) constituted only a minor fraction. The remaining detrital matter was produce...

3) Comment: The authors state that SCM contribute largely to “total water column” production; the depth for which they have estimated production is only given for one station (and it is 71 m. The depth of the water column at the sampling stations is not indicated in the paper. Response: Actually, 71 m is not the depth of the water column for station 303 but the depth of the euphotic zone. Never...