In the underwater world, visibility is everything. Whether it’s a diver navigating murky waters, an autonomous vehicle scanning the seafloor, or a naval operation relying on optical sensors, understanding how light behaves underwater is critical. A simple and powerful measure for assessing underwater...
As cities grow and landscapes transform, the effects of urbanization ripple far beyond skylines and traffic patterns. An often overlooked consequence is the increase in suspended sediment concentration in nearby rivers, lakes, and coastal waters. This can have massive implications for water quality,...
Understanding the composition of suspended particles in the ocean is essential for unraveling biogeochemical cycles, assessing ecosystem health, and improving remote sensing algorithms. Among the suite of optical tools available to oceanographers, in situ hyperspectral backscattering measurements such...
In aquatic optics and phytoplankton ecology, chlorophyll-a has long been the go-to proxy for estimating biomass and productivity. However, as our understanding of aquatic ecosystems deepens, so does our need for more nuanced tools. One such tool is Sequoia’s hyperspectral absorption meter, the...
When we think of pollution in our rivers, lakes, or oceans, we often picture oil slicks or floating plastic bottles. But suspended sediment is an important agent that must not be overlooked. Suspended sediment can act like a vehicle for pollutants, carrying them far from their original source. Many pollutants—especially...
YANG Tianwei, LIN Jun, JIAO Junpeng, WU Yue (2025): Integrated Analysis of Phytoplankton Community Characteristics in Mussel Aquaculture Areas Using Net Sampling with Microscopy and Holographic Particle Imaging. Journal of Tropical Oceanography, in press. https://www.jto.ac.cn/EN/10.11978/2025051 The...
Primary Producers are the organisms that in general convert inorganic materials (e.g., phosphate) into organic matter (e.g. lipids) through photosynthesis. In the aquatic realm, the dominant primary producers are the phytoplankton[1]. Primary Production relates to the amount of organic matter the Primary...
Sequoia’s LISST-200X enjoys popularity amongst microplastics researchers. The instrument has been used to analyze microplastic particle distributions from disposable masks[i] , investigate interactions between oil droplets and microplastics[ii],[iii],[iv] and measure microparticles from biodegradable...
Sequoia’s LISST-Portable|XR is widely used to analyze suspended sediment concentration (SSC) and particle size distribution (PSD) in various aquatic environments. It has been employed in laboratory and field studies, sedimentology, geomorphology, water quality studies, and hydropower and oil &...
Sequoia’s LISST-Portable|XR laser diffraction particle size analyzer has significantly advanced research in hydropower and sediment management by providing precise measurements of suspended sediment concentration (SSC) and particle size distribution (PSD) in various environments. It has been instrumental...