| Data Tables, Images, and Other Entities: |
| Data Table: | Air_Temperature_Units
View Table Metadata
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| Data Table: | File_and_Record_Numbers
View Table Metadata
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| Data Table: | Onyx_River_Temperature_Units
View Table Metadata
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| Data Table: | Solar_Radiation_Units
View Table Metadata
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| Data Table: | Relative_Humidity_Units
View Table Metadata
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| Data Table: | Soil_Temperature_Units
View Table Metadata
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| Data Table: | Wind_Measurement_Units
View Table Metadata
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| Data Table: | Water_Vapor_Density_Units
View Table Metadata
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| Data Table: | SnowHeight_SurfChange_Units
View Table Metadata
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Short Name: | vanda_met |
| Online Distribution Info: |
| Schema Name: | http://www.mcmlter.org/queries/met_results.jsp |
| Description: |
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You can build your own query for all the data in this station using the URL http://www.mcmlter.org/queries/met_results.jsp
and the described parameters, or you can just visit the URL http://www.mcmlter.org/queries/met_queries.jsp and simply use the form to build your
own metereology query from any McMurdo Dry Valleys Metereological station
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Here is an example to query for the barometric pressure from March 1998 to April 2000 at Lake Hoare:
http://www.mcmlter.org/queries/met_results.jsp?begDate=03/01/1998&endDate=04/01/2000&mask=MM/DD/YYYY%20HH24:Mi&metStation=HOEM&dataType=PRESSTA
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variable (dataType) abbreviations list for Vanda Station - VAAM
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RH (relative humidity at 3m)
AIRT (air temp at 3m)
WIND (wind speed, direction, etc)
SOILT (soil temperature
RADN (radiation)
SURFCHANGE (soil surface change or snow depth)
WVAPD (water vapor densities)
FLINE (file and record numbers)
ONYXT (onyx stream temperatures measured from Vanda met station)
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| begDate: |
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| Desired begin date for the data, use format MM/DD/YYYY |
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| endDate: |
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| Desired End Date for the data query |
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| mask: |
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| Associated Date format for the data record. I.e, a mask value that works here is MM/DD/YYYY HH24:Mi |
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| metStation: |
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| Code Name for the metereological station from which the data is asked, for this station is vanda |
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| dataType: |
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| variable abbreviation for the parameter of interest, such as wind speed or air temperature. For a list of the used abbreviations, see the description section above |
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| Data Set Owner(s): |
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Individual: | Andrew G. Fountain |
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Address: |
| Department of Geology, |
| 17 Cramer Hall, |
| 1721 SW Broadway, |
| Portland State University , |
| Portland, OR 97207-0751
USA |
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Phone:
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Email Address:
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| Metadata Provider(s): |
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Organization: | McMurdo Dry Valleys LTER |
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Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
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Phone:
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Phone:
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Email Address:
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| Associated Party: |
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Individual: | Hassan Basagic |
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Address: |
| Department of Geology, |
| Portland State University , |
| Portland, OR 97207-0751
USA |
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Email Address:
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Role:
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| Abstract: |
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As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological
data was collected from various locations throughout Beacon, Taylor, Wright and Victoria Valleys. These files contain data
for the Lake Vanda meteorology station.
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| Keywords: |
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- meteorology
(theme)
- temperature
(theme)
- air temperature
(theme)
- soil temperature
(theme)
- wind
(theme)
- relative humidity
(theme)
- solar radiation
(theme)
- snow depth
(theme)
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| Additional Information: |
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| Comments |
Meteorological data is collected year-round at each of the stations in the McMurdo Dry Valleys of Antarctica.
After retrieving this data (usually every January), the parameters that are recorded are processed from level 0 (raw) to level
1 (processed, provided on the web). The raw data file descriptions and task lists summarize what was done to get from
level 0 to level 1 for all station found at the following address:
http://www.mcmlter.org/data/meteorology/tasks/task_lists.htm
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| Citations |
Doran, Peter T., Gayle L. Dana, Jordan T. Hastings and Robert A. Wharton, Jr. 1995.
McMurdo Dry Valleys Long-Term Ecological Research (LTER): LTER automatic weather network (LAWN).
Antarctic Journal of the U.S. 30(5): 276-280.
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| Notes |
Data contained in these files has been subjected to quality
control standards imposed by the investigator. The user of this data should be
aware that, while efforts have been taken to ensure that these data are of the
highest quality, there is no guarantee of perfection for the data contained
herein and the possibility of errors exists. If you encounter questionable data,
please contact the MCM LTER data manager (telephone: 303-492-4639) so that the
data can be corrected or qualified. Thus, these data may be modified and future
data will be appended.
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| License and Usage Rights: |
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| MCM LTER data may be used freely with the following restrictions: |
The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
A copy of any resultant publications should be sent to the McMurdo data manager and principal investigator.
The end-user follow the guidelines set forth in the LTER Network Data Access Policy, Data Access Requirements, and General Data Use Agreement found at http://www.mcmlter.org/data_guidelines.htm
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| Geographic Coverage: |
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Geographic Description: | The Vanda meteorology station is located at a latitude of 77.523 S,
a longitude of 161.011 E, and an elevation of 296 meters above sea level. Descriptions of this and other
McMurdo Dry Valley meteorology stations can be found at
http://www.mcmlter.org/data/meteorology/locations/metlocs.html
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Bounding Coordinates:
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| West: | 161.66678 degrees
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| East: | 161.66677 degrees
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| North: | -77.51680 degrees
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| South: | -77.51681 degrees
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Mimimum Altitude: | 297 meter |
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Maximum Altitude: | 296 meter |
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| Temporal Coverage: |
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Begin:
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End:
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| Maintenance: |
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Description:
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On September 9, 1999, the data manager added the 1998-1999 data to this dataset. In the process,at the
request of Thomas Nylen, she did some fine-tuning of the data. Revisions included:
1. Removal and flagging of WDir and WDirStd values on Nov 25, 1994 @ 9:20. Since windspeed was zero (0),
it made no sense to have values for wind direction.
2. Addition of PAR values between Dec 30, 1994 @ 17:00 and Jan 20, 1995 @ 15:00.
On June 1, 2000, the 1999-2000 data was posted. In the process, Denise Steigerwald changed thelayout of
the files so that they were sorted by category (air temperatures, humidity, radiation,wind etc.) rather than by year.
Files containing monthly and daily averages were generated andminor adjustments were made to the metadata.
On June 1, 2000, relative humidity (RH) values were corrected for a systematic error in themeasurement created
by an instrument manufacturer error. All RH data with air temperaturesbelow freezing were corrected using the
vapor pressure over ice (rather than over water whichwas used initially). The error became quite large for very
cold temperatures (the correction couldgrow to around 30%). The formula used for the correction was:
RH_corr=RH_orig/((A*temp*temp)+(B*temp)+C)
where
RH_corr = corrected relative humidity
RH_orig = original relative humidity
temp = air temperature
A = 4.165E-5
B = 9.7E-3
C = 1.0
For example, with an air temperature of -2.3 and RH_orig of 50.6, the RH_corr will be 51.7.Records that
showed corrected RH values greater tha n or equal to 100 were changed to 99.99and flagged.
In June 2000, summary files were added to the web containing daily and monthly statistics.These were
generated by creating "views" of daily and monthly means, minimums, maximumsand counts of the
records represented in the Oracle database's meteorology tables.
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In 2007, it was realized that the RH error was still present in parts of the dataset. Hasan Basagic made
the above corrections to the VAAM dataset for the date range 1/26/2004 11:00 - 12/16/2006 10:00 (101,277 records).
In September, 2007 the information manager (Chris Gardner) removed all old RH data and re-inserted then newly
calculated values and associated comments. The original files are archive in the 'submitted data' section of the
mcmlter server.
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Frequency:
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| Contact: |
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Organization: | McMurdo Dry Valleys LTER |
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Position: | Data Manager |
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Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
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Phone:
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Email Address:
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| Publisher: |
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Organization: | McMurdo Dry Valleys LTER |
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Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
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Phone:
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| Methods Info: |
| Step 1: |
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Description:
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During the 1994-1995 field season, the Lake Vanda meteorological station was constructed
near the mouth of the Onyx River. The station was set up to sample sensors every 30 seconds and send summary
statistics (for example, averages and maximums) to solid-state storage modules every 20 minutes between November
24, 1994 and December 30, 1994, every hour between December 30, 1994 and November 21, 1995, and every 15 minutes
thereafter. This has resulted in approximately 20 values being recorded for final storage in every output
interval.
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Sampling Coverage:
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| Geographic Coverage: |
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Geographic Description: | The Vanda meteorology station is located at a latitude of 77.523 S,
a longitude of 161.011 E, and an elevation of 296 meters above sea level. Descriptions of this and other
McMurdo Dry Valley meteorology stations can be found at
http://www.mcmlter.org/data/meteorology/locations/metlocs.html.
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Bounding Coordinates:
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| West: | 161.66678 degrees
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| East: | 161.66677 degrees
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| North: | -77.51680 degrees
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| South: | -77.51681 degrees
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Mimimum Altitude: | 297 meter |
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Maximum Altitude: | 296 meter |
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Sampling Description:
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| Sampling and Averaging Intervals |
For Sampling frequency and Data Logger output and averaging intervals please visit:
http://www.mcmlter.org/data/meteorology/methods/Interval_Dates.pdf
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| Seasonal Task Summary |
To view the data post-processing steps for each season please visit:
http://www.mcmlter.org/data/meteorology/tasks/task_lists.htm
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