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SUMMARY:Microfluidics for a macro ocean: autonomous sensors for ocean biog
 eochemical measurements
DTSTART:20181102T110000
DTEND:20181102T120000
DTSTAMP:20260509T185200Z
UID:14555a5f229c18eff272d2a9a73db239dcd5a0853e540b1db0a42623
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Alisson SCHAAP\, Senior Research Engineer\, Microfluidic Se
 nsors  in the National Oceanography Centre\, Southampton\, UK\n \nAbstra
 ct\n\nNatural waters – including oceans\, lakes\, seas\, and rivers – 
 are vital for life on earth and yet often inadequately sampled and underst
 ood due in no small part to the difficulty and cost of accessing open wate
 r for manual sampling. To address this\, the National Oceanography Centre 
 in Southampton develops microfluidic sensors designed to autonomously perf
 orm in situ measurements of water chemistry down to full ocean depths. By 
 taking advantage of the low reagent and power consumption achievable by co
 mbining microfluidics and optics\, these sensors can be – and have been 
 – deployed for months at a time in a wide range of settings.\n \n\nIn t
 his presentation I’ll first give an overview of our general sensor platf
 orm\, which has been implemented to measure a wide range of chemical param
 eters including nitrate\, phosphate\, and pH. Some recent deployments – 
 from the arctic to the tropics – will be used to illustrate the advantag
 es and long-term potential of this technology.\n \n\nThe second part of t
 he presentation will focus in on one of our newest sensors\, which measure
 s the total alkalinity of water. Alkalinity is a measurement of the capaci
 ty of water to buffer against changes in pH and is thus a key parameter fo
 r monitoring and modelling ocean acidification and the carbon cycle. The s
 cientific applications of this sensor require reliable accuracy (better th
 an 0.1%) during autonomous deployments lasting months in harsh and varying
  conditions. The sensor has just been deployed at sea for the first time t
 his summer\; the results from lab tests and preliminary results from the s
 ea show that the technology is in a strong position to be able to meet the
 se demands.\n \n\nLastly\, I’ll discuss some of the engineering challen
 ges that arise when creating technology that has to survive at sea\, lesso
 ns we’ve learned\, and the group’s future plans for the technology.
LOCATION:AAC 1 108
STATUS:CONFIRMED
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