ROMANCHE 1

Name: ROMANCHE 1
Start: 1991-08-11
End: 1991-09-07
Location: Atlantic Ocean

Type	Oceanographic cruise
Set	This cruise is part of the set ROMANCHE
Ship	L'Atalante
Ship owner	Ifremer
Dates	11/08/1991 - 07/09/1991
Chief scientist(s)	MERCIER Herle
	LABORATOIRE D'OCÉANOGRAPHIE PHYSIQUE ET SPATIALE - UMR 6523 Centre Ifremer Bretagne ZI Pointe du Diable CS 10070 29280 Plouzané +33 (0)2 98 22 42 76 dirumr6523@ifremer.fr http://www.umr-lops.fr/
DOI	10.17600/91004511
Objective	Mapping the bathymetry in the ROMANCHE and CHAIN fracture zones to identify the places where Antarctic Bottom Water flows from the west basin towards the east basin of the Atlantic (depths of 4,100 m). Taking hydrological and geochemical measurements in the passage areas to characterize the Deep Water and Bottom Water during their progression from West to East and highlight any mixing processes.

Sea/Ocean

Atlantic Ocean

(Z.F. Romanche et Chain Atlantique Nord)

Ports

Port of departure : Dakar (Senegal)

Port of return : Dakar (Senegal)

Project

WOCE/ROMANCHE

Scientific Authority

OPS / LABORATOIRE DE PHYSIQUE DES OCEANS (LPO)

IFREMER Centre de Bretagne

ZI Pointe du diable

29280 PLOUZANE

+33 (0)2 98.22.42.76

fabrice.ardhuin@ifremer.fr

http://www.umr-lops.fr/

Participating bodie(s)

INSU,IFREMER,ORSTOM,UBO,LODYC,GRGS,Université STRASBOURG

Discipline(s)

PHYSICAL OCEANOGRAPHY
MARINE GEOSCIENCES

Code	Label	Quantity	PI
B06	Dissolved organic matter (inc DOC) Carbone organique dissous	13	MERCIER Herle
G27	Gravity measurements gravimetre Bodenseewerk KSS30	-	MERCIER Herle
G28	Magnetic measurements	-	MERCIER Herle
G74	Multi-beam echosounding EM12D	-	MERCIER Herle
H09	Water bottle stations	70 stations	MERCIER Herle
H10	CTD stations	71 stations	MERCIER Herle
H13	Bathythermograph sippican	-	MERCIER Herle
H21	Oxygen	70 stations	MERCIER Herle
H22	Phosphate	70 stations	MERCIER Herle
H24	Nitrate	70 stations	MERCIER Herle
H25	Nitrite	70 stations	MERCIER Herle
H26	Silicate	70 stations	MERCIER Herle
H71	Surface measurements underway (T,S) Thermosalinomètre SIS et Thermomètre TQP	-	MERCIER Herle
H73	Geochemical tracers (eg freons) freon 11 et 12	38 stations	MERCIER Herle
M06	Routine standard measurements Centrale Meteo et Centrale Vent	-	MERCIER Herle

Summary of measurements

-70 CTD stations.
-Analyses of salinity, concentrations of dissolved oxygen, nutrients, freon 11 and 12 in samples taken during CTD station (from 16 to 32 samples).
-Sippican.
-EM12 multibeam echosounder surveys.

Location map

Positionning system

Geodetic system : WORLD GEODETIC SYSTEM 1984 = WGS84

Positioning system : GPS naturel

Data managed by SISMER

Bibliography

Publications

Corda Laura, Palmiotto Camilla (2015). Rhodalgal-Foramol facies in equatorial carbonates: insights from Miocene tectonic islands of the central Atlantic. Palaeogeography Palaeoclimatology Palaeoecology, 428, 21-30. https://doi.org/10.1016/j.palaeo.2015.03.039

Palmiotto Camilla, Corda Laura, Ligi Marco, Cipriani Anna, Dick Henry J. B., Douville Eric, Gasperini Luca, Montagna Paolo, Thil Francois, Borsetti Anna Maria, Balestra Barbara, Bonatti Enrico (2013). Nonvolcanic tectonic islands in ancient and modern oceans. Geochemistry Geophysics Geosystems, 14(10), 4698-4717. https://doi.org/10.1002/ggge.20279

Thierry Virginie , Mercier Herle, Treguier Anne-Marie (2006). Seasonal fluctuations in the deep central equatorial Atlantic Ocean: a data-model comparison. Ocean Dynamics, 56(5-6), 581-593. https://doi.org/10.1007/s10236-005-0045-y

Ferron Bruno, Treguier Anne-Marie, Mercier Herle (2004). Modelling of the bottom water flow through the Romanche Fracture Zone with a primitive equation model - Part 2: Comparison of vertical mixing parameterisations with observations. Ocean Modelling, 6(2), 177-190. https://doi.org/10.1016/S1463-5003(03)00024-6

Thierry Virginie , Treguier Anne-Marie, Mercier Herle (2004). Numerical study of the annual and semi-annual fluctuations in the deep equatorial Atlantic Ocean. Ocean Modelling, 6(1), 1-30. https://doi.org/10.1016/S1463-5003(02)00054-9

Ferron Bruno, Mercier Herle, Treguier Anne-Marie (2000). Modeling of the bottom water flow through the Romanche Fracture Zone with a primitive equation model - Part I: Dynamics. Journal of Marine Research, 58(6), 837-862. Publisher's official version : https://doi.org/10.1357/002224000763485728 , Open Access version : https://archimer.ifremer.fr/doc/00000/802/

Messias Mj, Andrie C, Memery Laurent, Mercier Herle (1999). Tracing the North Atlantic Deep Water through the Romanche and Chain fracture zones with chlorofluoromethanes. Deep-sea Research Part I-oceanographic Research Papers, 46(7), 1247-1278. https://doi.org/10.1016/S0967-0637(99)00005-9

Ferron Bruno, Mercier Herle, Speer Kevin, Gargett Ann, Polzin Kurt (1998). Mixing in the Romanche Fracture Zone. Journal Of Physical Oceanography, 28(10), 1929-1945. Publisher's official version : https://doi.org/10.1175/1520-0485(1998)028<1929:MITRFZ>2.0.CO;2 , Open Access version : https://archimer.ifremer.fr/doc/00447/55830/

Mercier Herle, Speer Kevin G. (1998). Transport of bottom water in the Romanche Fracture Zone and the Chain Fracture Zone. Journal Of Physical Oceanography, 28(5), 779-790. https://doi.org/10.1175/1520-0485(1998)028<0779:TOBWIT>2.0.CO;2

Mercier Herle, Morin P (1997). Hydrography of the Romanche and Chain Fracture Zones. Journal Of Geophysical Research-oceans, 102(C5), 10373-10389. https://doi.org/10.1029/97JC00229

Mercier Herle, Speer Kevin G, Honnorez José (1994). Flow pathways of bottom water through the Romanche and chain fracture zones. Deep-sea Research Part I-oceanographic Research Papers, 41(10), 1457-1477. https://doi.org/10.1016/0967-0637(94)90055-8

References of Technical Reports

Mercier Herle, Billant Andre, Branellec Pierre, Morin Pascal, Messias Marie-José, Memery Laurent, Thomas Catherine, Honnorez Jose (1992). Campagne ROMANCHE 1. L'Atalante (10 août· 8 septembre 1991). Données CTD02 , Chimie et Bathymétrie. LPO 92-02. https://archimer.ifremer.fr/doc/00233/34414/