Date (Creation)

2024-10-04

Citation identifier

http://data.bgs.ac.uk/id/dataHolding/13608295

Point of contact

Organisation name	Individual name	Electronic mail address	Role
National Oceanography Centre	Mr Sourav Kumar Sahoo	not available	Originator
University of Southampton	Hanif Santyabudhi Sutiyoso	not available	Originator
National Oceanography Centre	Laurence North	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency

notApplicable

GEMET - INSPIRE themes, version 1.0

• Geology

BGS Thesaurus of Geosciences

• NGDC Deposited Data

dataCentre

• NGDC Deposited Data

Keywords

• NERC_DDC

Access constraints

Other restrictions

Other constraints

licenceOGL

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints

Other restrictions

Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Language

English

Topic category

• Geoscientific information

Distribution format

Name	Version
MS Excel

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item186441	Data

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5285/33a2b804-9631-4b58-801a-32d1b14c697e	Digital Object Identifier (DOI)

Hierarchy level

Non geographic dataset

Other

non geographic dataset

Statement

The experimental setup at the National Oceanography Centre (NOC), Southampton, employed a 4.5 m stainless steel acoustic pulse tube with an inner diameter of 0.07 m for analysing acoustic properties via plane wave propagation. Experiments were conducted at 19°C and 2.5 MPa effective pressure, similar to thawing permafrost conditions. A piezoelectric transducer generated 1-20 kHz chirp signals through the sample, positioned between two hydrophones spaced 1.2 m apart. Data were recorded with a 6-second, 20 kHz chirp using a synchronized Agilent signal generator and a LeCroy oscilloscope, with 16 stacked readings to enhance the signal-to-noise ratio. Confining and pore pressures were regulated by an ISCO EX-100D syringe pump system, systematically increased while venting to prevent air entrapment. Measurements in an empty pulse tube were taken as a calibration reference. The samples were prepared by compacting sand in a PVC pipe in successive layers, scratching each layer’s surface to avoid impedance contrasts. After full compaction, we incrementally saturated the sample with de-ionized water in ~10% steps, tapping the pipe to release air bubbles. Once saturation was complete, the sample was sealed with the top endcap and left for 24 hours before conducting the water-saturated benchmark measurement in the pulse tube. Readings were regularly taken as the samples melted inside the water-filled acoustic pulse tube. Then, we inferred the ice saturation from elapsed melting time during measurements. Time-domain data were processed using Fast Fourier Transform (FFT), deconvolved to obtain impulse responses, and gated to reduce reflections. The experimental setup has been calibrated, with velocity and attenuation errors of ±2.4% and ±5.8%. Complete information about this can be found at: https://doi.org/10.1111/1365-2478.13607.

Metadata

File identifier

259eba2f-3704-4534-e063-0937940a6f5a XML

Metadata language

English

Hierarchy level

Non geographic dataset

Hierarchy level name

non geographic dataset

Date stamp

2025-05-20

Metadata standard name

UK GEMINI

Metadata standard version

2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey		enquiries@bgs.ac.uk	Point of contact

Dataset URI

http://data.bgs.ac.uk/id/dataHolding/13608295