Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Witte, Ursula; Pfannkuche, Olaf (2000): Oxygen flux measured in surface sediments of the Arabian Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.58837, Supplement to: Witte, U; Pfannkuche, O (2000): High rates of benthic carbon remineralization in the abyssal Arabian Sea. Deep Sea Research Part II: Topical Studies in Oceanography, 47(14), 2785-2804, https://doi.org/10.1016/S0967-0645(00)00049-7

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
During the large-scale deep-sea programme BIGSET in situ measurements of sediment community oxygen consumption (SCOC) were carried out during three cruises between 1995-1998 at five abyssal sites (3190-4450 m water depth) in the deep Arabian Sea in order to elucidate the regional and temporal variation of benthic carbon remineralisation. SCOC ranged from 0.9-6.3 mmol O2 m**-2 d**-1, with highest values in the western and northern Arabian Sea and lowest values in the southern Arabian Sea. For the central Arabian Sea intermediate oxygen uptake rates were detected. This regional pattern mirrors the overall regional pattern of primary productivity in surface waters and vertical particulate organic carbon (POC) flux at 1000 mab. Primary productivity in Arabian Sea surface waters and particulate flux into the deep-sea are controlled by the monsoon system and the flux maxima during the SW and NE monsoon are among the highest particle fluxes recorded in the deep open ocean. Highest flux rates were recorded in the western and northern Arabian Sea and decreased towards the central and southern Arabian Sea. SCOC at our western, northern and eastern Arabian Sea stations WAST, NAST and EAST were considerably higher than so far detected in other abyssal areas of the global oceans, and vertical POC flux can account for only 20-50% of benthic carbon remineralisation (BCR). Possible explanations for the high rates of BCR at these stations that are situated close to the continental margins are discussed: the accelerated deposition of very labile organic matter due to eolian dust particles, enhanced rain efficiencies, and lateral advection. A significant temporal variability in SCOC only could be detected at the eastern and western Arabian Sea stations WAST and EAST.
Coverage:
Median Latitude: 14.989879 * Median Longitude: 64.015773 * South-bound Latitude: 10.002000 * West-bound Longitude: 60.266167 * North-bound Latitude: 19.999000 * East-bound Longitude: 68.594000
Date/Time Start: 1995-10-02T09:52:00 * Date/Time End: 1998-03-03T18:03:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
M33/1_FFR-02 * Latitude: 16.169000 * Longitude: 60.515000 * Date/Time Start: 1995-10-02T09:52:00 * Date/Time End: 1995-10-03T07:52:00 * Elevation: -4042.0 m * Device: Bottom lander, chamber (BL_C)
M33/1_FFR-04 * Latitude: 14.438000 * Longitude: 64.576000 * Date/Time Start: 1995-10-08T13:35:00 * Date/Time End: 1995-10-10T05:35:00 * Elevation: -3952.0 m * Device: Bottom lander, chamber (BL_C)
M33/1_FFR-06 * Latitude: 15.582000 * Longitude: 68.594000 * Date/Time Start: 1995-10-15T05:20:00 * Date/Time End: 1995-10-16T21:20:00 * Elevation: -3829.0 m * Device: Bottom lander, chamber (BL_C)
Comment:
Replicate measurements from different chambers
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Latitude of eventLatitude
2Longitude of eventLongitude
3Event labelEvent
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6Oxygen flux, sediment oxygen demandSODmmol/m2/dayWitte, UrsulaIncubation of bottom water, in-situ
7Oxygen flux, standard deviationO2 flux std dev±Witte, UrsulaIncubation of bottom water, in-situ
Size:
23 data points

Download Data

Download dataset as tab-delimited text (use the following character encoding: )

View dataset as HTML