Data

Davis Aerodrome Project (DAP) – Water Chemistry of selected lakes of the Vestfold Hills

Australian Antarctic Division
Gibson, J., King, C.K. and Brown, K. ; GIBSON, JOHN ; KING, CATHERINE K. ; BROWN, KATHRYN EUNICE
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.aad.gov.au/metadata/AAS_5097_DAP_Lake_chemistry&rft.title=Davis Aerodrome Project (DAP) – Water Chemistry of selected lakes of the Vestfold Hills&rft.identifier=http://data.aad.gov.au/metadata/AAS_5097_DAP_Lake_chemistry&rft.publisher=Australian Antarctic Data Centre&rft.description=The Davis Aerodrome Project (DAP) collected a range of environmental survey data over several field seasons to support a comprehensive environmental assessment of the proposed aerodrome. This data includes flora, fauna, soils, lake ecosystem, nearshore, marine, air quality and meteorological information which has been collected by a number of different methods, and extends across the current Davis Station, proposed aerodrome and supporting infrastructure footprint (Ridge Site), previous sites considered for the aerodrome (Heidemann Valley, Adams Flat), as well as locations across the Vestfold Hills away from any of the proposed developments. The Vestfold Hills is one of the largest, ice-free coastal oasis in Antarctica. The rocky landscape is dotted with over 3000 lakes and ponds, ranging in area from over 8 km2 to less than 100 m2, and in depth from over 130 m to a few centimetres. The water in most of the lakes is sourced from local snowbank melt that collects in topographic lows, though some are meltwater from the Antarctic icesheet. Water in these lakes are ultrafresh. Other lakes, originally formed by the isolation of marine basins during isostatic rebound, are now saline to hypersaline. Nearly all of the lakes are permanent features of the landscapes, though some of the smaller and shallower ponds can disappear during drier periods. This metadata record refers to a dataset of selected chemical characteristics of a series of lakes that was recorded during the Davis aerodrome Project (DAP). Many of the lakes sampled, especially in the area of the proposed aerodrome, had not previously been sampled and therefore no earlier data is available. Two types of data are presented (1) chemical analyses of single samples collected from the margin of the lakes or from the surface water near the centre of the lake collected from a small boat (data from samples from deeper in the water column are also included for Williams Lake); and (2) vertical profiles of a small selection of the lakes. These profiles also contain some physical data, notably water temperature.Spatial coverage-    Latitude: -68.300 to -68.700 Longitude: 77.700 to 78.700Data resolutionLatitude and longitude Resolution:Samples site location was recorded with a GPS, and is therefore accurateData resolution:The accuracy and the resolution of the chemical data obtained in the field is given in detail in the instrument handbooks. The accuracy and resolution of the data from the NATA-accredited laboratories can be inferred from the number of significant figures given for each analyte. The detection limit is represented by insertion of “Progress Code: completedStatement: The data were collected by three different methods, each with their own data quality considerations: 1. Hand held water chemistry meter (YSI 556 MPS Multi Probe System). Data was obtained in the field using high quality water meters. In general the data obtained from these meters will be of a high standard, though the measured pH and the calculated Salinity and Total Dissolved Solids must be viewed with some caution. pH sensors are not necessarily designed to account for salinity in high salinity samples. Similarly, the internal algorithms used to calculate Salinity and Total Dissolved Solids may not be accurate at high salinity. These data should be viewed as indicative only. 2. NATA- accredited analytical laboratories. Samples collected at the margin of the lake were frozen and eventually submitted to a NATA-accredited analytical laboratory. These data should be viewed as being of the highest quality with the possible exception of ammonia/ammonium, for which the sample treatment (freezing, and a significant time period between sample collection and analysis) was less than perfect. 3. Lake vertical profiles. The profiles were collected with a high quality instrument that recorded data at set time intervals (every 10 sec). The probe was typically lowered in 1 metre steps. In some profiles, especially if stratification was present in the water column, the data shows some drift; this represents the sensors coming to equilibrium at the new depth, as well as the dispersal of local density currents caused by the lowering of the profiler. The final data at each depth is likely to most accurately reflect the characteristics of the water column of the lake at that depth.&rft.creator=Gibson, J., King, C.K. and Brown, K. &rft.creator=GIBSON, JOHN &rft.creator=KING, CATHERINE K. &rft.creator=BROWN, KATHRYN EUNICE &rft.date=2022&rft.coverage=westlimit=77.7; southlimit=-68.7; eastlimit=78.7; northlimit=-68.3&rft.coverage=westlimit=77.7; southlimit=-68.7; eastlimit=78.7; northlimit=-68.3&rft.coverage=uplimit=200; downlimit=0&rft.coverage=uplimit=200; downlimit=0&rft_rights=These data are publicly available for download from the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_5097_DAP_Lake_chemistry when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=inlandWaters&rft_subject=EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > CONDUCTIVITY&rft_subject=EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > NUTRIENTS&rft_subject=EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > GASES > DISSOLVED OXYGEN&rft_subject=EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS&rft_subject=EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > pH&rft_subject=VESTFOLD HILLS&rft_subject=ENVIRONMENTAL ASSESSMENTS&rft_subject=DAVIS AERODROME PROJECT (DAP)&rft_subject=LAKE STRATIFICATION&rft_subject=LAKE VERTICAL PROFILE&rft_subject=YSI 556 MPS MULTI PROBE SYSTEM&rft_subject=LAKE SALINITY&rft_subject=LAKE WATER CHEMISTRY&rft_subject=LAKE CATIONS&rft_subject=TEMPERATURE PROBES&rft_subject=CONDUCTIVITY METERS&rft_subject=SALINOMETERS&rft_subject=PH METERS&rft_subject=FIELD SURVEYS&rft_subject=AMD/AU&rft_subject=AMD&rft_subject=CEOS&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=CONTINENT > ANTARCTICA&rft_subject=CONTINENT > ANTARCTICA > VESTFOLD HILLS&rft_subject=CONTINENT > ANTARCTICA > DAVIS AERODROME PROJECT STUDY AREA&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

These data are publicly available for download from the provided URL.

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_5097_DAP_Lake_chemistry when using these data.

This metadata record is publicly available.

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Full description

The Davis Aerodrome Project (DAP) collected a range of environmental survey data over several field seasons to support a comprehensive environmental assessment of the proposed aerodrome. This data includes flora, fauna, soils, lake ecosystem, nearshore, marine, air quality and meteorological information which has been collected by a number of different methods, and extends across the current Davis Station, proposed aerodrome and supporting infrastructure footprint (Ridge Site), previous sites considered for the aerodrome (Heidemann Valley, Adams Flat), as well as locations across the Vestfold Hills away from any of the proposed developments.

The Vestfold Hills is one of the largest, ice-free coastal oasis in Antarctica. The rocky landscape is dotted with over 3000 lakes and ponds, ranging in area from over 8 km2 to less than 100 m2, and in depth from over 130 m to a few centimetres. The water in most of the lakes is sourced from local snowbank melt that collects in topographic lows, though some are meltwater from the Antarctic icesheet. Water in these lakes are ultrafresh. Other lakes, originally formed by the isolation of marine basins during isostatic rebound, are now saline to hypersaline. Nearly all of the lakes are permanent features of the landscapes, though some of the smaller and shallower ponds can disappear during drier periods.

This metadata record refers to a dataset of selected chemical characteristics of a series of lakes that was recorded during the Davis aerodrome Project (DAP). Many of the lakes sampled, especially in the area of the proposed aerodrome, had not previously been sampled and therefore no earlier data is available.

Two types of data are presented (1) chemical analyses of single samples collected from the margin of the lakes or from the surface water near the centre of the lake collected from a small boat (data from samples from deeper in the water column are also included for Williams Lake); and (2) vertical profiles of a small selection of the lakes. These profiles also contain some physical data, notably water temperature.

Spatial coverage
-    Latitude: -68.300 to -68.700 Longitude: 77.700 to 78.700

Data resolution
Latitude and longitude Resolution:
Samples site location was recorded with a GPS, and is therefore accurate

Data resolution:
The accuracy and the resolution of the chemical data obtained in the field is given in detail in the instrument handbooks. The accuracy and resolution of the data from the NATA-accredited laboratories can be inferred from the number of significant figures given for each analyte. The detection limit is represented by insertion of “<” before the limit in the data.

Date Resolution
The date of in situ data collection is recorded. The date on which the detailed analyses were undertaken is not recorded.

Lineage

Progress Code: completed
Statement: The data were collected by three different methods, each with their own data quality considerations: 1. Hand held water chemistry meter (YSI 556 MPS Multi Probe System). Data was obtained in the field using high quality water meters. In general the data obtained from these meters will be of a high standard, though the measured pH and the calculated Salinity and Total Dissolved Solids must be viewed with some caution. pH sensors are not necessarily designed to account for salinity in high salinity samples. Similarly, the internal algorithms used to calculate Salinity and Total Dissolved Solids may not be accurate at high salinity. These data should be viewed as indicative only. 2. NATA- accredited analytical laboratories. Samples collected at the margin of the lake were frozen and eventually submitted to a NATA-accredited analytical laboratory. These data should be viewed as being of the highest quality with the possible exception of ammonia/ammonium, for which the sample treatment (freezing, and a significant time period between sample collection and analysis) was less than perfect. 3. Lake vertical profiles. The profiles were collected with a high quality instrument that recorded data at set time intervals (every 10 sec). The probe was typically lowered in 1 metre steps. In some profiles, especially if stratification was present in the water column, the data shows some drift; this represents the sensors coming to equilibrium at the new depth, as well as the dispersal of local density currents caused by the lowering of the profiler. The final data at each depth is likely to most accurately reflect the characteristics of the water column of the lake at that depth.

Notes

Purpose
This dataset records (1) the results of chemical analyses carried out on samples collected from lakes during the DAP project; and (2) vertical profiles of selected lakes. This sampling program aimed to collect base line information from waterbodies located in the DAP area of interest, as well as more broadly across the Vestfold Hills, to inform environmental assessment processes being undertaken by the Davis Aerodrome and Davis Masterplan projects.

Data time period: 2016-12-01 to 2021-12-31

This dataset is part of a larger collection

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78.7,-68.3 78.7,-68.7 77.7,-68.7 77.7,-68.3 78.7,-68.3

78.2,-68.5

text: westlimit=77.7; southlimit=-68.7; eastlimit=78.7; northlimit=-68.3

text: uplimit=200; downlimit=0

Subjects
AMD | AMD/AU | CEOS | CONDUCTIVITY METERS | CONTINENT > ANTARCTICA | CONTINENT > ANTARCTICA > DAVIS AERODROME PROJECT STUDY AREA | CONTINENT > ANTARCTICA > VESTFOLD HILLS | DAVIS AERODROME PROJECT (DAP) | EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS | EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > GASES > DISSOLVED OXYGEN | EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > NUTRIENTS | EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > CONDUCTIVITY | EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > pH | ENVIRONMENTAL ASSESSMENTS | FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | LAKE CATIONS | LAKE SALINITY | LAKE STRATIFICATION | LAKE VERTICAL PROFILE | LAKE WATER CHEMISTRY | PH METERS | SALINOMETERS | TEMPERATURE PROBES | VESTFOLD HILLS | YSI 556 MPS MULTI PROBE SYSTEM | inlandWaters |

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Other Information
Download the dataset. (GET DATA > DIRECT DOWNLOAD)

uri : https://data.aad.gov.au/eds/5487/download

Public information for AAS project AAS_5097 (PROJECT HOME PAGE)

uri : https://projects.aad.gov.au/report_project_public.cfm?project_no=AAS_5097

Citation reference for this metadata record and dataset. (VIEW RELATED INFORMATION)

uri : https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_5097_DAP_Lake_chemistry

Identifiers
  • global : AAS_5097_DAP_Lake_chemistry