BODC Cruise Metadata Report for RV Pelagia (64PE) cruise PE246 (RANAMOX)

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information
A summary of BODC data holdings for the cruise from the
- National Oceanographic Database
- Projects Database
References - including cruise tracks and cruise reports

Cruise Inventory Information

Long name	RV Pelagia (64PE) cruise PE246 (RANAMOX)
Short name	PE246 (RANAMOX)
Objectives and Narrative	The cruise aimed to continue the work started on the first two cruises in this project that took place in spring and autumn of last year. We collected samples from a range of soft substrata using a box corer along a depth transect. The purpose of this sampling was to examine differences and possible regulatory factors to the contribution of anammox (anaerobic ammonium oxidation) and denitrification in the coastal sea environment. The work is part of a wider project in which we are studying the regulatory factors and potential contributions of the novel anammox process in estuarine and coastal sediments, and hopefully to put it into context as part of the global nitrogen cycle. Sediments were sampled and incubated in bottom water collected using the CTD before 15N tracer experiments were used to examine the rates and contributions of anammox and denitrification. At the same time data were collected using the CTD array to provide information on the water column above the sediments. We also measured selected nutrient concentrations from the bottom water samples as well as dissolved oxygen, oxygen uptake rates, oxygen and nutrient profiles. Samples were taken for the determination of C and N, molecular analysis, as well as sediment porosity.
Ship	RV Pelagia
Departure Port	Het Horntje, Netherlands
Departure Date	2006-03-13
Arrival Port	Het Horntje, Netherlands
Arrival Date	2006-04-04
Principal Scientist(s)	Joanna C Nicholls (Queen Mary University of London School of Biological and Chemical Sciences)
Responsible Organisation	Queen Mary University of London School of Biological and Chemical Sciences
Associated Project(s)	Regulation of anaerobic ammonium oxidation in estuarine and continental shelf se
IHB Sea Areas Visited	Irish Sea and St. George's Channel, North East Atlantic Ocean (limit 40W)
Marsden Squares Visited	145/181
Work Area Description	The Shelf break, North Atlantic, south of the South Western Approaches, 145 Irish Sea, 181 Six sites 1; -9.85307, 48.06218, 2; -9.70602, 48.17887, 3; -9.70922, 48.2669, 4; -6.09968, 51.21805, 5; -5.59223, 53.882, 6; -5.58365, 54.11903.
Unable to lookup cruise bounds at this time
Work Area Bounding Polygon
Southern Limit	unknown
Northern Limit	unknown
Western Limit	unknown
Eastern Limit	unknown

Cruise Inventory Datasets

Physical oceanography
CTD stations	Quantity: number of profiles = 10 Description: CTD drop for vertical profile (up and down casts) ; salinity, temperature, depth, turbidity, PAR and oxygen. Discrete sampling at every m. Bottom water concentrations of NO3-, NO2- and NH4+ were measured using colourmetric detection methods (Kirkwood, 1996). The samples were primarily taken as a water bath for incubating cores under in situ water.
Geology and geophysics
Core - soft bottom	Quantity: number of samples = 24 Description: Repeated box cores over 6 stations for sub-sampling into cores. The cores were then used to measure oxygen uptake, oxygen profiles, nutrient profiles, potential denitrification and anammox rates. Sub samples of the cores were taken for molecular analysis.