Blog Home » Profiling CTDs

Blog Home » Profiling CTDs

Profiling CTDs

Analog Sensor Integration Guide

Analog Sensor Integration Guide

From bottom contact triggers to transmissometers, oceanographic sensor options are vast and diverse, and choosing the right combination of sensors can significantly augment a CTD’s measurement capabilities. Although getting disparate technologies to talk to one...

read more
Q&A: Diagnose This Profile

Q&A: Diagnose This Profile

The data shows conductivity from a 19plus deployed in a shallow estuarine river. The red line shows the CTD downcast and the green line shows the upcast. While the upcast data show the expected shape for a CTD profile (low conductivity at the surface, rising conductivity as the CTD descends), the downcast shows an unusual shape in until about 2.6 meters depth, where conductivity appears to suddenly correct itself.

read more
Q&A: Two Symptoms of the Same Problem

Q&A: Two Symptoms of the Same Problem

May 2020 Newsletter The data above show two major symptoms of the same problem occurring in different locations on a 19plusV2 profiling CTD. On the left, oxygen appears to drop below zero and is highly erratic during the downcast (light blue). However, once it hits a...

read more
Q&A: Erratic Profiles

Q&A: Erratic Profiles

November 2019 Newsletter The data above come from a profiling CTD, deployed in sea conditions that caused approximately 1-meter ship heave. Two things stick out – relatively unchanging salinity data during the downcast, and noisy data during the upcast (shown in light...

read more
Salinity Spikes: Sensor or Environment?

Salinity Spikes: Sensor or Environment?

These data show a subtle problem that is producing “fuzzy” salinity and oxygen data. While the overall shape of the profile appears reasonable, small spikes are present throughout the CTD cast. The black lines encompass a particularly strange spot where both salinity...

read more

Featured Posts

AGU24 Conference

We hope to see you at AGU24 Overview Each year, AGU’s annual meeting, the largest gathering of Earth and space scientists, convenes 25,000+ attendees from 100+ countries to share research and connect with friends and colleagues. Scientists, educators, policymakers,...

The HydroCAT-EP V2 Multiparameter CTD

The HydroCAT-EP V2 Multiparameter CTD: Precision Insights for Environmental Monitoring Dive into the future of environmental monitoring with Sea-Bird Scientific's cutting-edge HydroCAT-EP V2 (HCEP-V2). This multiparameter CTD offers an impressive dynamic range,...