Land-Ocean Interaction Study (LOIS)

Rivers, Atmosphere and Coasts Study (RACS)

Schematic diagram showing the environments studied during the LOIS project
Schematic diagram showing the environments studied during the LOIS project ©

Contents

1. Introduction
2. RACS (C) data sets
 2.1 The coastal oceanographic data set
 2.2 The Humber estuarine data set
 2.3 The Tweed estuarine data set
 2.4 The Holderness experiment
3. RACS (A) data sets

1. Introduction

The Land-Ocean Interaction Study (LOIS) was a NERC research programme designed to study processes in the coastal zone. 

The Rivers, Atmosphere and Coasts Study (RACS) was a major component of LOIS that looked at land-sea interactions in the coastal zone and the major exchanges (physical, chemical and biological) between rivers and estuaries and the atmosphere. The study focused on the east coast of the UK from the Wash to the Tweed.

RACS included several sub-components —

RACS (C) was coordinated by Plymouth Marine Laboratory and RACS (A) by the University of East Anglia.

2. RACS (C) data sets

Go to the top of this pageA study of the estuaries, coasts and coastal waters between Great Yarmouth and Berwick upon Tweed.

2.1 The coastal oceanographic data set

The coastal oceanographic data set was collected during a series of 17 RRS Challenger cruise legs. Most cruises covered two survey grids. One from Great Yarmouth to the Humber designed around the distribution of the sandbanks and a second simple zig-zag grid from the Humber to Berwick on Tweed. A large number of anchor stations, usually over one or two tidal cycles, were worked in the area of the Humber mouth or the Holderness coast.

The parameters measured were

temperature bathymetric depth trace metals
salinity dissolved organic carbon/total dissolved nitrogen sediment characteristics
attenuance chlorophyll contaminants
dissolved oxygen suspended particulate matter concentration and grain size sediment pore water chemistry
nutrients particulate organic carbon/particulate organic nitrogen benthic fluxes
irradiance primary and new production benthic macrofauna

 

All data sets collected during the RACS RRS Challenger cruises are held by BODC. All underway and CTD data have been fully calibrated and quality controlled by BODC. The water sample and benthic data sets have been quality controlled by the data originators and submitted to BODC.

The data are contained in the RACS (C) Marine I and RACS (A) CDROM which is available from BODC. The individual data sets are held in our databank and are available on request. Contact the BODC Enquiries Officer for further details.

Go to the top of this page2.2 The Humber estuarine data set

The Humber estuarine data set was collected during a series of 33 campaigns on the Environment Agency vessels Sea Vigil and Water Guardian in the Humber, Trent and Ouse river systems at approximately monthly intervals between June 1993 and December 1996.

Each campaign consisted of two or three one-day cruises. The tracks covered the estuary from the tidal limits of both Trent and Ouse to Spurn Point. Instrumental and sample data are available from a series of fixed stations that were sampled during every campaign.

The parameters measured were

temperature nutrients dissolved organic carbon/total dissolved nitrogen
salinity chlorophyll particulate organic carbon/particulate organic nitrogen
dissolved oxygen suspended particulate matter contaminants

 

The above represent a superset of the parameters collected during the project. Not every parameter is available for every campaign, but temperature, salinity and nutrients are available for virtually all campaigns.

The data are contained in the RACS (C) Marine I and RACS (A) CDROM which is available from BODC. The individual data sets are held in our databank and are available on request. Contact the BODC Enquiries Officer for further details.

Go to the top of this page2.3 The Tweed estuarine data set

The Tweed estuarine data set was collected during a series of 13 campaigns using RV Tamaris in association with a rigid inflatable vessel at approximately monthly intervals between July 1996 and July 1997. Each campaign covered the tidal reaches of the River Tweed.

The parameters measured were

temperature salinity dissolved organic carbon/total dissolved nitrogen
oxygen nutrients  
pH turbidity  

 

Note that some parameters were not measured on every campaign.

The data are contained in the RACS (C) Marine I and RACS (A) CDROM which is available from BODC. The individual data sets are held in our databank and are available on request. Contact the BODC Enquiries Officer for further details.

Go to the top of this page2.4 The Holderness Experiment

The Holderness Experiment consisted of three moored instrument deployments during the winters of 1993-1994, 1994-1995 and 1995-1996. Mooring platforms holding a bottom pressure recorder, current meters and a transmissometer were deployed at eight stations along two lines off the Holderness coast. There were very little ADCP data for the 1993 and 1994 deployments.

The parameters measured were current velocity, temperature, salinity, wave parameters, attenuance/sediment load and bottom pressure.

The data are held by BODC in our databank and are available on request. Contact the BODC Enquiries Officer for further details.

Go to the top of this page3. RACS (A) data sets

An atmospheric chemistry study looking at air mass changes from the Wash into East Anglia

The bulk of the RACS (A) data set was collected during two field campaigns in the winter (October/November) of 1994 and the summer (May/June) of 1995.

During these campaigns data were collected continuously from the University of East Anglia Atmospheric Observatory at Weybourne on the north Norfolk coast. An instrumented vessel was stationed offshore to provide a second sampling site to allow changes in a given air mass to be monitored. The Imperial College Jetstream research aircraft made one flight during each campaign to provide a link between the two surface stations. The Jetstream made four additional flights in 1996 and 1997.

The data are held by BODC as a series of ASCII data files conforming to the NASA Ames 1001 format, which is a simple ASCII format with a standardized header. The data files contain a varied suite of chemical parameters together with meteorology and navigation data.

Go to the top of this pageThe RACS (A) data set is contained in the RACS (C) Marine I and RACS (A) CDROM which is available from BODC. The individual data sets are held in our databank and are available on request. Contact the BODC Enquiries Officer for further details.


Related LOIS pages at BODC

LOIS project data management at BODC      LOIS Shelf Edge Study (SES) project data management at BODC
Order the LOIS RACS(C) Marine I and RACS(A) CDROM      Order the LOIS SES CDROM

 

Related external links

NERC LOIS project pages