| 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: | Precipitation_Units
View Table Metadata
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| Data Table: | Barometric_Pressure_Units
View Table Metadata
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| Data Table: | Radiation_Units
View Table Metadata
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| Data Table: | Relative_Humidity_Units
View Table Metadata
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| Data Table: | Soil_Temp_Units
View Table Metadata
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| Data Table: | Wind_Units
View Table Metadata
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Short Name: | hoare_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 Lake Hoare Station - HOEM
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RH (relative humidity at 3m)
AIRT (air temp at 3m)
PPT (precipitation)
WIND (wind speed, direction, etc)
SOILT (soil temperature)
RADN (radiation)
PRESSTA (barometric pressure)
SNOWFALL_MM (snowfall)
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 hoare |
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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 the Lake Hoare meteorology station (in Taylor Valley).
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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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| Pre-LTER data |
Lake Hoare meteorology data before 1993 (pre-LTER) came from Gary Clow
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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 Hoare meteorology station is located at a latitude of 77 1.45324 S,
a longitude of 162 54.02422067 E, and an elevation of 77.1 meters above sea level. Descriptions of this and other
McMurdo Dry Valley meteorology stations can be found at
http//huey.colorado.edu/LTERhttp://www.mcmlter.org/data/meteorology/locations/metlocs.html.
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Bounding Coordinates:
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| West: | 162.90041 degrees
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| East: | 162.90040 degrees
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| North: | -77.02421 degrees
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| South: | -77.02422 degrees
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Mimimum Altitude: | 78 meter |
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Maximum Altitude: | 77 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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During the fall of 2007, Karen Cozzetto, PhD student under McKnight at the University of Colorado Boulder, discovered an
error in the pre-LTER data that originated from Gary Clow (pre 12/2/1993 12:00). These data included Air temp, relative humidity,
wind speed and direction, and incoming SW rad. The time stamp for these data were shifted by several house in some cases. These
data were fixed by Karen after consulting Clow. The new data were re-inserted into the database by Chris Gardner on 12/5/2007.
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On September 2, 1999, at the request of Thomas Nylen, the data manager did some fine-tuning
of the data. This included:
1. Addition of AirTdel3m1 values between Dec 18, 1993 @ 20:30 and Jan 22, 1995 @
23:40. Although these values were listed as good in the task list, they had accidently been
removed from the files.
2. Addition of precipitation values from Nov 19, 1994 @ 00:20 to Jan 22, 1995 @ 23:40.
The task list indicated the data was good, but it had been removed from the files.
3. Addition of PresSta values from Nov 18, 1994 @ 23:40 to Jan 22, 1995 @ 23:40. The
task list indicated the data was good, but it had been removed from the files.
4. Addition of WSpdMax and WSpdMin values from Dec 28, 1994 @ 22:00 to Jan 22,
1995 @ 23:40. The task list indicated the data was good, but it had been removed from
the files.
5. Removal and flagging of WDirStD and WSpd values between Dec 2, 1994 @ 21:00 and
Dec 28, 1994 @ 11:40. The values had been flagged in the task list. Since data collected
prior to this period contained the same flags and were subjectively voided, a similar
approach seemed appropriate for these records.
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 30, 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 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 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.
In May 2003, incoming and outgoing shortwave radiation between December 18, 1993 @ 1930
and Jan 16, 1994 @ 2300 were flagged as questionable. Often during this period there are
maximum and minimum threshold values that the sensors reach and do not fall above or below.
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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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The Lake Hoare meteorology station was one of two meteorological stations operating on the floor of
Taylor Valley at the start of the first McMurdo LTER field season (1993-1994). The McMurdo LTER team took control of this
station during this season, and replaced it with a new station, located a few meters above the old site to avoid rising lake
levels.
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 10 minutes between December 18, 1993 and January 16, 1994, every three hours between January
16, 1994 and November 18, 1994, every 20 minutes between November 18, 1994 and November 28, 1995, and every 15 minutes
thereafter. This has resulted in approximately 20 values being recorded for final storage in every output interval. Primary
measurements made on Lake Hoare meteorology station, instrumentation used, and time of initiation are shown in the following
table.
On Jan 26, 2002 a second datalogger and the TE525MM Tipping bucket rain gage was installed. The tipping bucket records the number
of tips every 15 minutes. Three soil probes, 0, 5 and 10 cm below the surface were added to the datalogger on Dec 29, 2002.
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Sampling Coverage:
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| Geographic Coverage: |
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Geographic Description: | The Hoare meteorology station is located at a latitude of 77 1.45324 S,
a longitude of 162 54.02422067 E, and an elevation of 77.1 meters above sea level. Descriptions of this and other
McMurdo Dry Valley meteorology stations can be found at
http//huey.colorado.edu/LTERhttp://www.mcmlter.org/data/meteorology/locations/metlocs.html.
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Bounding Coordinates:
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| West: | 162.90041 degrees
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| East: | 162.90040 degrees
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| North: | -77.02421 degrees
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| South: | -77.02422 degrees
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Mimimum Altitude: | 78 meter |
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Maximum Altitude: | 77 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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