| Data Tables, Images, and Other Entities: |
| Data Table: | Air_Temperature_Units
View Table Metadata
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| Data Table: | Precipitation_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_Units
View Table Metadata
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Short Name: | explorers_cove_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 Exlporer's Cove - EXEM
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RH (relative humidity at 3m)
AIRT (air temperature)
PPT (precipitation)
WIND (wind speed, direction, etc)
SOILT (soil temperature)
RADN (radiation)
FLINE (file and record numbers)
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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 or - decimal - for a decimal year) |
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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 Explorer's Cove - EXEM |
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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 Taylor, Wright and Victoria Valleys. These files contain data for Explorers Cove
meteorology station.
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| Keywords: |
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- meteorology
(theme)
- temperature
(theme)
- air temperature
(theme)
- soil temperature
(theme)
- precipitation
(theme)
- wind
(theme)
- relative humidity
(theme)
- radiation
(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 Explorers Cove meteorology station is located
at a latitude of 77 3.08314 S, a longitude of 163 25.0514 E, and an
elevation of 25.7466 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: | 163.41753 degrees
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| East: | 163.41752 degrees
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| North: | -77.05138 degrees
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| South: | -77.05139 degrees
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Mimimum Altitude: | 26 meter |
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Maximum Altitude: | 25 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 6, 1999, the data mana ger added the 1998-1999 data to this dataset. In the process,
she did some fine-tuning of the data, which included the removal and flagging of precipitation
values between Nov 21, 1997 @ 11:00 and Jan 13, 1998 @ 9:30. This was done at the request of
Thomas Nylen.
In May 2000, the 1999-2000 data was posted. In the process, Denise Steigerwald changed the
layout 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 and
minor adjustments were made to the metadata.
On May 24, 2000, relative humidity (RH) values were corrected for a systematic error in the
measurement created by an instrument manufacturer error. All RH data with air temperatures
below freezing were corrected using the vapor pressure over ice (rather than over water which
was used initially). The error became quite large for very cold temperatures (the correction could
grow to around 30%). The formula used for the correctio n 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 than or equal to 100 were changed to 99.99
and 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, maximums
and 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 EXEM dataset for the date range 1/23/2004 10:00 - 1/30/2007 11:00 (39,365 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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At the start of the first McMurdo LTER field season
(1993-1994), Explorers Cove station was one of only two meteorological stations
operating on the floor of the McMurdo Dry Valleys. The U.S. Geological Survey
continued to manage the station. From November 24, 1995 to February 26, 1996,
precipitation levels were sampled every hour for the long-term ecological
research program. On February 26, 1996, the signal from the precipitation gage
went dead and remained so until new equipment was installed in November, 1997.
As a result there is a gap in the data collected at Explorers Cove
meteorological station.
In November, 1997, a new station with all new sensors mounted on Clow's old
tripod was set up. At that time, 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 15 minutes. This has resulted in approximately
20 values being recorded for final storage in the more recent output intervals.
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Sampling Coverage:
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| Geographic Coverage: |
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Geographic Description: | The Explorers Cove meteorology station is located
at a latitude of 77 3.08314 S, a longitude of 163 25.0514 E, and an
elevation of 25.7466 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: | 163.41753 degrees
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| East: | 163.41752 degrees
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| North: | -77.05138 degrees
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| South: | -77.05139 degrees
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Mimimum Altitude: | 26 meter |
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Maximum Altitude: | 25 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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