Cruise inventory

RRS Charles Darwin CD16

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD16
Cruise period1986-09-08 — 1986-10-11
StatusCompleted
Port of departureVictoria, Seychelles
Port of returnMuscat, Oman
PurposeResearch
Objectives1. To determine the vertical distribution and hydrochemistry of nitrogen compounds along off-shore sections of 11 stations from the Gulf of Oman in SE Arabia to the Central oligotrpohic gyre (05N, 67E) and equatorial waters.
2. To quantify the rates of nitrogen assimilation by size-fractionated phytoplankton in relation to their ecophysiology (Nitrogen prefernce, kinetics, light dependence).
3. To estimate bacterial and microzooplanktonic recycling of nitrogen using N-15 isotope dilution techniques, grazing dilution and precision respirometry, in euphotic and oxygen-depleted zones (ODZ) of the NWIO.
4. The net transformation rates of nitrogen in euphotic waters will be followed over the short term (two days) using N-15 'pulse chase' experiments and trace nutrients analyses.
5. Nutrients, salinity, temperature, oxygen, in vivo fluorescence, and near surface vertical variability of chlorophyll, S, T will be continuously monitored between stations and in the upwelling waters off SE Arabia.
6. Free drifting triple sedimentation trap array will be deployed over periods of 1-25 days to quantitate sedimentation, loses from the euphotic chemocline and suboxic aphotic regions of the water column.
7. To investigate bacterial abundance and productivity within the productive, oxgen depleted and upwelling waters of the NWIO.
8. To determine the vertical and latitudinal distribution of trace metals and rare earth elements in the NWIO.
Chief scientistR Fauzi C Mantoura (Institute of Marine Environmental Research, Plymouth)
Cruise programmeRRS Charles Darwin CD16 cruise programme cd16.pdf — access key 'C' (0.21 MB) 
Cruise reportRRS Charles Darwin CD16 cruise report cd16.pdf — access key 'C' (6.12 MB) 
Ocean/sea areas 
GeneralIndian Ocean
SpecificIndian Ocean
Track chartsRRS Charles Darwin CD16 cruise track — cd16track.pdf (0.05 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of deployments = 1
Description: The deployment and recovery datesand times, position, station numbers and associated oceanographic data for CTD, sediment traps, incubation rig and UOR deployments.
Biology and fisheries 
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 5 Depth: 100m Exposure: 36.1h Drift: 7.4nm Speed: 0.2kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 100m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 500m Exposure: 31.4h Drift: 0.9nm Speed: 0.02kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 7 Depth: 50m Exposure: 21.4h Drift: 13.9nm Speed: 0.66kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 500m Exposure: 21.5h Drift: 10.1nm Speed: 0.47kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 9 Depth: 50m Exposure: 33.6h Drift: 5.7nm Speed: 0.17kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 500m Exposure: 24.9h Drift: 5.4nm Speed: 0.22kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: F Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 3 Depth: 125m Exposure: 22.7h Drift: 6.6nm Speed: 0.3kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 14 Depth: 74m Exposure: 25.6h Drift: 16.9nm Speed: 0.66kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 75m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 500m Exposure: 25.6h Drift: 10.6nm Speed: 0.41kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 16 Depth: 50m Exposure: 26.8h Drift: 13.9nm Speed: 0.52kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: not stated Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 16a Depth: 50m Exposure: 35.3h Drift: 16.0nm Speed: 0.45kn
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: B Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: C Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: D Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: E Depth: 50m Exposure: not stated Drift: not stated Speed: not stated
Sediment trapsQuantity: number of deployments = 1
Description: The deployment and recovery datesand times, position, station numbers and associated oceanographic data for CTD, sediment traps, incubation rig and UOR deployments.
Sediment trapsQuantity: number of deployments = 1
Description: Sediment trap deployment. Station no.: 1 Depth: 100m Exposure: 48h Drift: 27.8nm Speed: 0.58kn
Moorings, landers, buoys 
Physical oceanography 
CTD stations23° 39' 59" N  59° 4' 12" E — Cast: 902 Time: 0837 Depth: 230-500 Purpose: experiments
CTD stations19° 26' 42" N  58° 18' 41" E — Cast: 1604 Time: 0904 Depth: 0-450 Purpose: experiments
CTD stations0° 10' 41" N  65° 14' 17" E — Cast: 108 Time: 1232 Depth: 70 Purpose: experiment
CTD stations17° 26' 29" N  61° 30' 35" E — Cast: 1402 Time: 0001 Depth: 0-50 Purpose: production
CTD stations0° 2' 23" N  64° 59' 53" E — Cast: 103 Time: 0640 Depth: 700-3900 Purpose: chemical cast
CTD stations0° 7' 11" N  65° 12' 5" E — Cast: 107 Time: 0618 Depth: 50 Purpose: experiment
CTD stations3° 59' 17" N  67° 0' 47" E — Cast: 202 Time: 1005 Depth: 0-3100 Purpose: chemical cast
CTD stations14° 22' 17" N  66° 51' 23" E — Cast: 505 Time: 0308 Depth: 0-200 Purpose: experiment
CTD stations24° 49' 29" N  57° 12' 54" E — Cast:1103 Time: 1232 Depth: 0-55 Purpose: chemical cast
CTD stations17° 26' 17" N  61° 34' 5" E — Cast: 1404 Time: 1010 Depth: 0-100 Purpose: experiments
CTD stations19° 27' 5" N  58° 18' 47" E — Cast: 1601 Time: 0005 Depth: 0-40 Purpose: production
CTD stations0° 0' 9" N  65° 0' 17" E — Cast: 101 Time: 0028 Depth: 0-70 Purpose: Production
CTD stations0° 2' 17" N  65° 0' 0" E — Cast:102 Time: not stated Depth: not stated Purpose: experiments
CTD stations0° 3' 41" N  65° 5' 35" E — Cast:104 Time: 1453 Depth: 0-600 Purpose: chemical cast
CTD stations0° 4' 12" N  65° 5' 53" E — Cast:105 Time: 1902 Depth: 0-200 Purpose: profiling
CTD stations0° 7' 30" N  65° 7' 23" E — Cast:106 Time: 0015 Depth: 0-200 Purpose: production
CTD stations0° 12' 23" N  65° 19' 47" E — Cast: 109 Time: 1833 Depth: 200 Purpose: experiment
CTD stations0° 13' 48" N  65° 22' 35" E — Cast: 110 Time: 0222 Depth: 0-1200 Purpose: chemical cast
CTD stations3° 59' 35" N  67° 0' 5" E — Cast: 201 Time: 0630 Depth: 0-600 Purpose: chemical cast
CTD stations7° 59' 53" N  66° 59' 42" E — Cast: 301 Time: 0023 Depth: 0-200 Purpose: production
CTD stations8° 0' 47" N  66° 59' 5" E — Cast: 302 Time: 0323 Depth: 600-4500 Purpose: chemaical cast
CTD stations7° 59' 35" N  67° 0' 23" E — Cast: 303 Time: 1048 Depth: 0-500 Purpose: chemical cast
CTD stations7° 57' 11" N  67° 0' 36" E — Cast: 304 Time: 0031 Depth: 0-100 Purpose: production
CTD stations7° 55' 47" N  67° 1' 23" W — Cast: 305 Time: 1030 Depth: 0-1000 Purpose: experiment
CTD stations11° 59' 47" N  66° 58' 48" E — Cast: 401 Time: 2038 Depth: 600-4200 Purpose: chemical cast
CTD stations11° 59' 35" N  66° 58' 53" E — Cast: 402 Time: 0327 Depth: 0-500 Purpose: chemical cast
CTD stations14° 25' 35" N  66° 55' 23" E — Cast: 501 Time: not stated Depth: 0-75 Purpose: production
CTD stations14° 25' 35" N  66° 55' 17" E — Cast: 502 Time: 0313 Depth: 0-3900 Purpose: chemical cast
CTD stations14° 22' 23" N  66° 54' 11" E — Cast: 503 Time: 1029 Depth: 0-500 Purpose: chemical cast
CTD stations14° 22' 30" N  66° 54' 0" E — Cast: 504 Time: not stated Depth: 0-75 Purpose: production
CTD stations14° 21' 35" N  66° 50' 35" E — Cast: 506 Time: 0500 Depth: 100-300 Purpose: chemical cast
CTD stations14° 20' 17" N  66° 54' 29" E — Cast: 507 Time: 0921 Depth: 60-400 Purpose: chemical cast
CTD stations14° 18' 17" N  66° 56' 6" E — Cast: 508 Time: 1145 Depth: 0-400 Purpose: chemical cast
CTD stations18° 59' 53" N  67° 0' 29" E — Cast: 601 Time: 0236 Depth: 0-3200 Purpose: chemical cast
CTD stations18° 58' 35" N  66° 59' 29" E — Cast: 602 Time: 0940 Depth: 0-200 Purpose: chemical cast
CTD stations21° 15' 5" N  63° 15' 5" E — Cast: 701 Time: 1350 Depth: 0-100 Purpose: experiment
CTD stations21° 16' 5" N  63° 18' 41" E — Cast: 703 Time: 0016 Depth: 0-35 Purpose: production
CTD stations21° 15' 29" N  63° 21' 54" E — Cast: 704 Time: 0240 Depth: 175-3300 Purpose: chemical cast
CTD stations21° 14' 5" N  63° 27' 5" E — Cast: 705 Time: 1023 Depth: 0-175 Purpose: chemical cast
CTD stations22° 39' 36" N  60° 40' 35" E — Cast: 801 Time: 1134 Depth: 175-3000 Purpose: chemical cast
CTD stations22° 39' 18" N  60° 42' 23" E — Cast: 802 Time: 1734 Depth: 0-200 Purpose: chemical cast
CTD stations23° 40' 5" N  59° 4' 47" E — Cast: 901 Time: 0304 Depth: 0-500 Purpose: experiments
CTD stations23° 39' 5" N  59° 5' 41" E — Cast: 903 Time: not stated Depth: 0-500 Purpose: chemical cast
CTD stations23° 40' 30" N  59° 3' 23" E — Cast: 904 Time: 0015 Depth: 0-50 Purpose: production
CTD stations23° 38' 6" N  59° 1' 23" E — Cast: 905 Time: 0232 Depth: 175-2750 Purpose: chemical cast
CTD stations23° 35' 23" N  59° 0' 0" E — Cast: 906 Time: 0936 Depth: 0-140 Purpose: chemical cast
CTD stations23° 36' 0" N  58° 59' 53" E — Cast: 907 Time: 1522 Depth: 0-3 Purpose: experiments
CTD stations24° 20' 29" N  58° 9' 41" E — Cast: 1001 Time: 1121 Depth: 150-2700 Purpose: chemical cast
CTD stations24° 18' 9" N  58° 9' 59" E — Cast: 1002 Time: 1632 Depth: 0-200 Purpose: chemical cast
CTD stations24° 19' 53" N  58° 9' 47" E — Cast: 1003 Time: 0203 Depth: 0-50 Purpose: experiments
CTD stations24° 49' 17" N  57° 12' 47" E — Cast: 1101 Time: 0808 Depth: 60-1200 Purpose: chemical cast
CTD stations24° 49' 5" N  57° 13' 17" E — Cast: 1102 Time: 1126 Depth: 75-240 Purpose: experiments
CTD stations19° 57' 59" N  60° 47' 42" E — Cast: 1301 Time: 1458 Depth: 0-3500 Purpose: chemical cast
CTD stations19° 58' 5" N  60° 48' 53" E — Cast: 1302 Time: 2000 Depth: 0-300 Purpose: chemical cast
CTD stations17° 24' 36" N  61° 20' 29" E — Cast: 1401 Time: 1116 Depth: 0-500 Purpose: chemical cast
CTD stations17° 25' 35" N  61° 29' 5" E — Cast: 1403 Time: 0222 Depth: 0-3500 Purpose: chemical cast
CTD stations17° 26' 11" N  61° 35' 17" E — Cast: 1405 Time: 1130 Depth: 0-400 Purpose: chemical cast
CTD stations18° 12' 11" N  59° 42' 11" E — Cast: 1501 Time: 0304 Depth: 0-4000 Purpose: chemical cast
CTD stations18° 13' 11" N  59° 44' 17" E — Cast: 1502 Time: 0914 Depth: 0-300 Purpose: chemical cast
CTD stations19° 24' 5" N  58° 18' 5" E — Cast: 1602 Time: 0507 Depth: 0-580 Purpose: chemical cast
CTD stations19° 26' 42" N  58° 18' 41" E — Cast: 1603 Time: 0933 Depth: 0-43 Purpose: experiments
CTD stations21° 14' 47" N  63° 15' 41" E — Cast: 702 Time: 1535 Depth: 0-400 Purpose: experiment