Results 31 to 40 of about 6,072,571 (291)

Spatio-Temporal Variability of Phytoplankton Primary Production in Baltic Lakes Using Sentinel-3 OLCI Data

Remote Sensing, 2020
Phytoplankton primary production (PP) in lakes play an important role in the global carbon cycle. However, monitoring the PP in lakes with traditional complicated and costly in situ sampling methods are impossible due to the large number of lakes ...
Tuuli Soomets, Kristi Uudeberg, Kersti Kangro, Dainis Jakovels, Agris Brauns, Kaire Toming, Matiss Zagars, Tiit Kutser   +7 more
doaj   +1 more source

Determination of phytoplankton abundances (Chlorophyll- a ) in the optically complex inland water - The Baltic Sea [PDF]

Science of The Total Environment, 2017
A novel approach, termed Summed Positive Peaks (SPP), is proposed for determining phytoplankton abundances (Chlorophyll-a or Chl-a) and surface phytoplankton bloom extent in the optically complex Baltic Sea. The SPP approach is established on the basis of a baseline subtraction method using Rayleigh corrected top-of-atmosphere data from the Medium ...
Zhang, Daoxi, Lavender, Samantha, Muller, Jan-Peter, Walton, David, Karlson, Bengt, Kronsell, Johan   +5 more
openaire   +3 more sources

Optimal Cyanobacterial Pigment Retrieval from Ocean Colour Sensors in a Highly Turbid, Optically Complex Lake [PDF]

, 2019
To date, several algorithms for the retrieval of cyanobacterial phycocyanin (PC) from ocean colour sensors have been presented for inland waters, all of which claim to be robust models. To address this, we conducted a comprehensive comparison to identify
Gómez, José Antonio Domínguez, Martinez-Vicente, Victor, Andrew N. Tyler, Hunter, Peter D, Mátyás Présing, Eszter Zsigmond, Tyler, Andrew N, Victor Martinez-Vicente, Attila W. Kovács, Kovács, Attila W, Riddick, Caitlin A. L., Lajos Vörös, Vörös, Lajos, Hunter, Peter D., Hajnalka Horváth, Dominguez Gomez, Jose Antonio, Présing, Mátyás, W. Kovács, Attila, Riddick, Caitlin A L, Peter D. Hunter, José Antonio Domínguez Gómez, Caitlin A.L. Riddick, Horváth, Hajnalka, Zsigmond, Eszter   +23 more
core   +1 more source

Optical water typing in optically complex waters: A case study of Chesapeake Bay

Science of The Total Environment
Optical water typing has been widely used in aquatic research to classify water bodies based on their inherent optical properties as perceived through satellite-based measures of water color. While optical water type (OWT) classifications have primarily been used to better understand water color dynamics and improve satellite-based estimates of water ...
Anna E, Windle, Sairah Y, Malkin, Raleigh R, Hood, Greg M, Silsbe   +3 more
openaire   +2 more sources

Identifying phytoplankton pigments from absorption spectra – a regional approach based on data from Case-2 waters

Frontiers in Environmental Science
IntroductionDetermining chlorophyll-a from optical measurements and using it as a proxy for total phytoplankton biomass has long been a key approach for quantifying phytoplankton via remote sensing.
Ian-Andreas Rahn, Krista Alikas, Martin Hieronymi, Rüdiger Röttgers, Rene Freiberg, Kersti Kangro, Kersti Kangro   +6 more
doaj   +1 more source

Spectral Response of Remote Sensing Reflectance to Variation in CDOM, Phytoplankton, and Mineral Particles in Baltic Waters

Remote Sensing
Remote sensing reflectance (Rrs) in optically complex waters is controlled by the combined effects of phytoplankton, colored dissolved organic matter (CDOM), and suspended mineral particles. In the Baltic Sea, strong CDOM absorption and variable particle
Henryk Toczek, Kamila Haule, Włodzimierz Freda   +2 more
doaj   +1 more source

Merged Multi-Sensor Ocean Colour Chlorophyll Product Evaluation for the British Columbia Coast

Remote Sensing, 2023
Phytoplankton phenology studies require a dataset that is continuous in time and space since missing data have been shown to affect the accuracy of seasonality metrics.
Sejal Pramlall, Jennifer M. Jackson, Marta Konik, Maycira Costa   +3 more
doaj   +1 more source

Remote sensing chlorophyll a of optically complex waters (rias Baixas, NW Spain): Application of a regionally specific chlorophyll a algorithm for MERIS full resolution data during an upwelling cycle [PDF]

, 2011
This study takes advantage of a regionally specific algorithm and the characteristics of Medium Resolution Imaging Spectrometer (MERIS) in order to deliver more accurate, detailed chlorophyll a (chla) maps of optically complex coastal waters during an ...
Barton, Eric D., Spyrakos, Evangelos, Luis González Vilas, Torres-Palenzuela, Jesús M., Jesus M. Torres Palenzuela, González Vilas, Luis, Evangelos Spyrakos, Eric Desmond Barton, Barton, Eric Desmond, González-Vilas, Luis, Torres Palenzuela, Jesus M   +10 more
core   +1 more source

An adaptive hybrid algorithm for retrieving particulate organic carbon in complex coastal waters

International Journal of Applied Earth Observations and Geoinformation
The retrieval of particulate organic carbon (POC) from optical properties in coastal waters remains a significant challenge because of profound spatiotemporal heterogeneity in water composition.
Tao Zhou, Wen Zhou, Weilang Xie, Cai Li, Zhantang Xu, Xiankun Yang   +5 more
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source