Citation:

BF02708329

Name: Physical oceanography during SONNE cruise SO119
Published: 2000
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

As part of the German JGOFS Indian Ocean Programme, a cruise occurred in the Arabian Sea in May 1997 at the onset of the southwest monsoon. Data on gelbstoff, chlorophylla and tryptophan-like fluorescence as well as gelbstoff absorption were obtained. They indicate, that these optical parameters support the interpretation of hydrographic and biogeochemical conditions. Tryptophan-like fluorescence seems to be a useful indicator of changes in the constitution of the biomass.

A comparison of gelbstoff absorption and fluorescence data from the upper 100 m reveals only a weak covariance. Special emphasis is given to the fit procedure used for retrieving the exponential slopeS of the spectral absorption coefficient.S values with a mean of 0.016 nm-1 are found in the 350 to 480 nm wavelength range. A mean slopeS set to the frequently reported value of 0.014 nm-1 in the exponential description of gelbstoff absorption might lead to a systematic over/underestimation, and thus to systematic errors, if single-wavelength absorption values are extrapolated to other spectral regions on the basis of this parameter.

Related to:

Breves, Wiebke (2001): Bio-Optik im Arabischen Meer: Datenanalyse und Modellierung [dissertation]. Carl von Ossietzky University Oldenburg, 184 pp, https://oops.uni-oldenburg.de/id/eprint/266

Further details:

Documentation of CTD Data from SONNE cruise SO119. hdl:10013/epic.40681.d021

Project(s):

Joint Global Ocean Flux Study (JGOFS)

Coverage:

Median Latitude: 17.580275 * Median Longitude: 60.114575 * South-bound Latitude: 10.013000 * West-bound Longitude: 54.667000 * North-bound Latitude: 24.743000 * East-bound Longitude: 68.602000

Date/Time Start: 1997-05-14T17:05:00 * Date/Time End: 1997-06-05T06:32:00

Minimum DEPTH, water: -0.5 m * Maximum DEPTH, water: 3023.3 m

Event(s):

SO119_CTD-1-01 * Latitude: 24.743000 * Longitude: 65.810000 * Date/Time Start: 1997-05-14T17:05:00 * Date/Time End: 1997-05-14T18:27:00 * Elevation: -1242.0 m * Campaign: (JGOFS-IN-2) * Basis: * Method/Device: (CTD-O)

SO119_CTD-2-02 * Latitude: 23.529000 * Longitude: 65.306000 * Date/Time Start: 1997-05-15T05:07:00 * Date/Time End: 1997-05-15T06:01:00 * Elevation: -1017.0 m * Campaign: (JGOFS-IN-2) * Basis: * Method/Device: (CTD-O)

SO119_CTD-3-03 * Latitude: 19.949000 * Longitude: 65.825000 * Date/Time Start: 1997-05-16T11:10:00 * Date/Time End: 1997-05-16T13:23:00 * Elevation: -3149.0 m * Campaign: (JGOFS-IN-2) * Basis: * Method/Device: (CTD-O)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Date/Time of event	Date/Time
3	Latitude of event	Latitude
4	Longitude of event	Longitude
5	Elevation of event	Elevation	m
6	DEPTH, water	Depth water	m			Geocode
7	Pressure, water	Press	dbar	Heuermann, Rüdiger	CTD with attached oxygen sensor, ME Meerestechnik Elektronik, OTS 3000
8	Temperature, water	Temp	°C	Heuermann, Rüdiger	CTD with attached oxygen sensor, ME Meerestechnik Elektronik, OTS 3000
9	Salinity	Sal		Heuermann, Rüdiger	Calculated from conductivity
10	Conductivity	Cond	mS/cm	Heuermann, Rüdiger	CTD with attached oxygen sensor, ME Meerestechnik Elektronik, OTS 3000
11	Oxygen	O2	µmol/l	Heuermann, Rüdiger	Calculated from percentage saturation
12	Oxygen saturation	O2 sat	%	Heuermann, Rüdiger	CTD with attached oxygen sensor, ME Meerestechnik Elektronik, OTS 3000

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

392255 data points

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