N-ICE2015 total absorption profiles from water column

Profiles of total absorption coefficient of sea water at 440 nm with Hobilabs a-Sphere integrating sphere instrument (excluding pure water absorption). Taken coincident with SBE19+ and ISUS (nitrate sensor) profiles. AC-9 profiles were taken right after a-Sphere profiles were completed.


In situ profiles of optical properties were made from a heated tent at the ice camp several hundred meters away from the ship.

Simple

Date (Revision)
2017-11-07
Credit

Alexey Pavlov
Credit

Torbjørn Taskjelle
Credit

Stephen R. Hudson
Credit

Børge Hamre
Credit

Mats A. Granskog
Status
Completed
Publisher
  Norwegian Polar Institute - Alexey Pavlov
Theme

  • Lance

  • ICE

  • N-ICE2015

  • Cast

  • Floe-1

  • Floe-3

  • Floe-4

  • Leg-1

  • Leg-3

  • Leg-4

  • Leg-5

  • Leg-6

  • marine

  • oceanography
Nasjonal tematisk inndeling (DOK-kategori)

  • Kyst og fiskeri
Global Change Master Directory (GCMD) Keywords

  • OCEANS | OCEAN OPTICS | ABSORPTION

  • OCEANS | SALINITY/DENSITY
Topic category
  • Oceans
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Begin date
2015-01-11
End date
2015-06-24
Distribution format
OnLine resource
https://data.npolar.no/dataset/7f7e56d0-9e70-4363-b37d-17915e09a935 ( WWW:DOWNLOAD-1.0-http--download )
Statement

Instrument was factory calibrated before and right after experiment. Data from corresponding CTD profiles were used for a temperature and salinity correction of spectral absorption data obtained with ac-9 and a-Sphere following Röttgers et al. [2014]. Absorption spectra from a-Sphere were smoothed to reduce the noise (LOESS method, Cleveland [1979]).


Data consists of 57 casts (profiles) with time, latitude and longitude and pressure (depth in meters) in the mat file. Data has be binned every 0.5 m with depth.


References:

Cleveland, W. S. (1979), Robust locally weighted regression and smoothing scatterplots, Journal of the American statistical association, 74(368), 829-836.


Röttgers, Rüdiger, David McKee, and Christian Utschig. 2014. “Temperature and Salinity Correction Coefficients for Light Absorption by Water in the Visible to Infrared Spectral Region.” Optics Express 22 (21), 25093-25108. doi:10.1364/OE.22.025093
File identifier
7dce5c52-2aef-55b2-8bc7-194996c5c888 XML
Metadata language
English
Hierarchy level
Dataset
Date stamp
2022-05-27
Metadata standard name

CEOS IDN DIF
Metadata standard version

9.8.4
 
 

Overviews

Spatial extent

N
S
E
W
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Keywords

Cast Floe-1 Floe-3 Floe-4 ICE Lance Leg-1 Leg-3 Leg-4 Leg-5 Leg-6 N-ICE2015 marine oceanography

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