Abstract

Ashmore Reef is a tropical marine reserve positioned at the confluence of Indian Ocean waters and the Indonesian Through Flow, has three vegetated cays all with fresh water lenses and two lagoons, separated by a calcareous algal rise. Both lagoons have two entrances on the northern side of the reef. The reef is subject to a 4.75 m semi-diurnal tide and on a spring tide ~7.5 km3 of water washes over the reef. The regional, lagoonal and well water qualities in and around Ashmore Reef have been observed from 1991 with a more intensive program since 1999 to ascertain it's chemistry and possible relationships with biodiversity. Sea surface temperatures of the surrounding oceanic water seasonally range from 25.48°C to 30.2°C and salinity from 34.51 to 34.75. Satellite derived lagoonal temperatures range from 25.4°C - 34.5 °C with an average of 29.4 °C, salinity ranges from 39.6 to 31.2. The fresh water lens on West Island has up to 150 000 ltr/yr pumped from the well. Well water temperature varies between 28°C and 29°C, and salinity has ranged from 0.03 to 3.94 with a pH of 7.64 dissolved oxygen percentage ranged from 27% to 51 %. This reef is within the tropical monsoonal belt, with thunderstorms occurring on ~85 days/yr and where evaporation potential is ~1820 mm, almost twice that of annual rainfall of ~950 mm. This article can be found in The Beagle, pp. 9-12. The Beagle is a print only journal.
Google map showing geographic bounding box with values North bound -11.5 East bound 124.0 West bound 122.0 South bound -13.0
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Product Type/Sub Type

dataset - External Publication

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2001

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

External Publication
hydrogeology
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-11.5
East bound
124.0
West bound
122.0
South bound
-13.0

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-b626-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2001-08-08

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Related Links
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays