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HODM
High frequency measurements from Howard Glacier Meteorological Station (HODM), McMurdo Dry Valleys, Antarctica (1993-2022, ongoing)
Peter
Doran
pdoran@lsu.edu
https://www.lsu.edu/science/geology/people/faculty/doran.php
https://orcid.org/0000-0002-3774-2847
Andrew
Fountain
P.O. Box 751
Portland
OR
97207
US
(503) 725-3386
andrew@pdx.edu
http://glaciers.pdx.edu/fountain/
https://orcid.org/0000-0001-5299-2273
McMurdo Dry Valleys LTER
http://mcmlter.org/
Krista
Myers
field technician
Renée
Brown
rfbrown@unm.edu
https://orcid.org/0000-0002-4986-7663
data manager
Maciej
Obryk
Cascades Volcano Observatory
Vancouver
WA
98683
US
maciej.obryk@gmail.com
https://orcid.org/0000-0002-8182-8656
former field crew
Hassan
Basagic
basagic@gmail.com
former field crew
Thomas
Nylen
thomasnylen@gmail.com
https://orcid.org/0000-0001-9579-8702
former field crew
Inigo
San Gil
Department of Biology, MSC03 2020 University of New Mexico
Albuquerque
NM
87131
US
(505) 277-2625
(505) 277-2541
isangil@lternet.edu
former data manager
2023-07-08
English
As part of the McMurdo Dry Valleys Long Term Ecological Research program, meteorological data are collected from various locations throughout the McMurdo Dry Valleys of Antarctica. This package contains 15-minute data from the Howard Glacier Meteorological Station (HODM), located in Taylor Valley (Latitude: -77.67121, Longitude: 163.07732, Elevation: 472 meters above sea level). HODM was established in 1993, during the 93/94 field season.
air temperature
climate
climatology
ice
meteorology
relative humidity
solar radiation
wind
wind direction
wind speed
LTER Controlled Vocabulary
air temperature
glacier
ice
ice temperature
ice thickness
meteorology
relative humidity
RH
temperature
wind
wind direction
wind speed
Station Keywords
disturbance
LTER Core Areas
Data Policies
This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-1637708). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.
https://mcm.lternet.edu/content/high-frequency-measurements-howard-glacier-meteorological-station-hodm-mcmurdo-dry-valleys
Meteorology station located at same coordinates as stake 31 on the Howard Glacier mass balance gridID:HODM
163.077300000000
163.077300000000
-77.671200000000
-77.671200000000
465
465
meter
1993-11-20
2022-12-19
Meteorological data is collected year-round at each of MCM LTER stations. Data is manually downloaded from the meteorological stations during the austral summer. Raw 15 minute data (Level 0) is processed and provided as Level 1 data on the MCM LTER website. Field notes, sensor information, processing procedures, QA/QC, and metadata is provided in the Meteorological Post Processing Documentation and Task Lists for each field season at the following address: https://mcm.lternet.edu/meteorological-task-lists
Metadata standardized in 2007 by Gardner and San Gil. Data and metadata was moved to DEIMS in 2014 (Inigo San Gil) In 2022, an error was discovered with the 'icesurfchange' dataset and corrected as follows. Beginning 2018-11-27 15:00, values previously found in the 'icesurfchange_cm' column were moved to the 'dist_to_surface' column.
McMurdo Dry Valleys LTER
Information Manager
im@mcmlter.org
McMurdo Dry Valleys LTER
http://mcmlter.org/
McMurdo Dry Valleys LTER
At the start of the 1993-1994 field season, the Howard Glacier meteorological station was constructed at the same coordinates as stake 31 on the glacier's mass balance grid (latitude of 77-40-17.36222 S, longitude of 163-04-44.83507 E, and elevation of 472.49343 meters above sea level). 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 20, 1993 and November 27, 1995, and every 15 minutes thereafter. This has resulted in approximately 20 values being recorded for final storage in every output interval. Sampling and Averaging Intervals For Sampling frequency and Data Logger output and averaging intervals please visit: http://mcmlter.lternet.edu/data/meteorology/methods/Interval_Dates.pdf
On September 3, 1999, at the request of Thomas Nylen, the data manager did some fine-tuning of the data. This included: 1. Deletion of flags for ice temperature measurements from Nov 20, 1993 @ 16:30 to Dec 24, 1993 @ 14:30. Instruments were not installed during this time; 2. Removal and flagging of WDir values for measurements taken between Nov 23, 1994 @ 10:20 and Jan 23, 1995 @ 13:20 where WSpd = 0. Since the wind speed values during this time were flagged as bad, the original database query probably did not flag the WDir data when WSpd =0. 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. On May 7, 2003, SwRadIn and SwRadOut values between 11/20/1993 4:30:00 PM and 11/23/1994 8:00:00 AM flagged as questionable because the values are significantly lower than the other stations during the same time period. It appears the pyranometers were either tilted or installed improperly. Also SwRadIn and SwRadOut values between 11/25/1997 @ 1445 and 01/10/1998 1430 because the wrong multiplier was used. The SwRadIn values were divided by 109.29 and multiplied by 115.61 and the SwRadOut were divided by 108.7 and multiplied by 116.41. On June 29, 2004, wind direction between 11/20/1993 16:30 to 11/27/1995 15:00 was flagged because the data is about +25 degrees off from the true direction. This was determined by comparing the daily wind direciton over the entire 10 years of record. Additionally, between 11/27/1995 15:30 to 11/25/1997 13:30, the wind direction data was flagged because it is about - 10 degrees off from the true direction.
HODM_AIRT
HODM - Air Temperature
mcmlter-clim-hodm_airt-15min-20230706.csv
43481270
1
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-hodm_airt-15min-20230706.csv
DATASET_CODE
DATASET_CODE
Code for given set of information for Howard Glacier meteorology station
string
Code for given set of information for Howard Glacier meteorology station
METLOCID
METLOCID
Location code for Howard Glacier meteorology station
string
Location code for Howard Glacier meteorology station
DATE_TIME
DATE_TIME
Date/time of sample (New Zealand DST, +13 UTC)
date
MM/DD/YYYY HH24:MI
AIRT1M
AIRT1M
Average air temperature at 1 m above ground
celsius
0.01
real
-70
15
Null
None given
AIRT3M
AIRT3M
Average air temperature at 3 m above ground
celsius
0.01
real
-70
15
Null
None given
AIRTMAX
AIRTMAX
Maximum air temperature at 2.5 - 3 m above ground
celsius
0.01
real
-70
15
Null
None given
AIRTMIN
AIRTMIN
Minimum air temperature at 2.5 - 3 m above ground
celsius
0.01
real
-70
15
Null
None given
AIRT_COMMENTS
air temperature comments
Noted comments by the investigator about the particular measure of air temperature
string
Noted comments by the investigator about the particular measure of air temperature
HODM_ICESURFCHANGE
HODM - Ice Surface Change
mcmlter-clim-hodm_icesurfchange-15min-20230706.csv
30574377
1
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-hodm_icesurfchange-15min-20230706.csv
DATASET CODE
DATASET CODE
Code for given set of information for Commonwealth Glacier meteorology station
string
Code for given set of information for Commonwealth Glacier meteorology station
METLOCID
METLOCID
Location code for Commonwealth Glacier meteorology station
string
Location code for Commonwealth Glacier meteorology station
DATE_TIME
DATE_TIME
Date/time of sample (New Zealand DST, +13 UTC)
date
MM/DD/YYYY HH:MI
ICESURFCHANGE_CM
ICESURFCHANGE_CM
Elevation of ice surface measured from fixed datum (Elevation of ice surface referenced to 0 at the time of installation)
centimeter
0.1
real
Null
None given
ICESURFCHANGE_COMMENTS
ICESURFCHANGE_COMMENTS
Noted comments by the investigator about the particular measure of DEPTH_
string
Noted comments by the investigator about the particular measure of DEPTH_
DIST_TO_SURFACE
Distance to surface
the distance between the sensor and the surface in meters
meter
0.4
real
Null
None given
HODM_RADN
HODM - Solar Radiation
mcmlter-clim-hodm_radn-15min-20230706.csv
63548425
1
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-hodm_radn-15min-20230706.csv
DATASET_CODE
DATASET_CODE
Code for given set of information for Howard Glacier meteorology station
string
Code for given set of information for Howard Glacier meteorology station
METLOCID
METLOCID
Location code for the Howard glacier meteorology station - HODM
string
Location code for the Howard glacier meteorology station - HODM
DATE_TIME
Date/time
Date/time of sample (McMurdo time)
date
MM/DD/YYYY HH24:MI
LWRADIN
LWRADIN
Incoming longwave radiation based on applying instrument-specific multiplier
W/m2
0.1
real
-5
400
Null
None given
SWRADIN
SWRADIN
Incoming shortwave radiation/solar flux
W/m2
0.1
real
Null
None given
SWRADOUT
SWRADOUT
Outgoing shortwave radiation/solar flux
W/m2
0.1
real
Null
None given
RADN_COMMENTS
radiation comments
Noted comments by the investigator about the particular measure of radiation
string
Noted comments by the investigator about the particular measure of radiation
HODM_RH
HODM - Relative Humidity
mcmlter-clim-hodm_rh-15min-20230706.csv
39911486
1
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-hodm_rh-15min-20230706.csv
DATASET_CODE
DATASET_CODE
Code for given set of information for Howard Glacier meteorology station
string
Code for given set of information for Howard Glacier meteorology station
METLOCID
METLOCID
Location code for Howard Glacier meteorology station
string
Location code for Howard Glacier meteorology station
DATE_TIME
DATE_TIME
Date/time of sample (New Zealand DST, +13 UTC)
date
MM/DD/YYYY HH24:MI
RH
RH
The Relative Humidity, the percentage of water contained in the air
dimensionless
real
100
0
NULL
See RH_COMMENTS for missing value explanation
RH1M
RH1M
Relative humidity at 1 meter
percent
0.1
real
Null
See RH_COMMENTS column value for explanation on missing values
RH_COMMENTS
relative humidity comments
Noted comments by the investigator about the particular measure of relative humidity
string
Noted comments by the investigator about the particular measure of relative humidity
HODM_WIND
HODM - Wind Direction and Speed
mcmlter-clim-hodm_wind-15min-20230706.csv
52255299
1
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-hodm_wind-15min-20230706.csv
DATASET_CODE
DATASET_CODE
Code for given set of information for Howard Glacier meteorology station
string
Code for given set of information for Howard Glacier meteorology station
METLOCID
METLOCID
Location code for Howard Glacier meteorology station
string
Location code for Howard Glacier meteorology station
DATE_TIME
DATE_TIME
Date/time of sample (New Zealand DST, +13 UTC)
date
MM/DD/YYYY HH24:MI
WDIR
WDIR
Average wind direction
degreesfromnorth
0.1
real
0
360
Null
See WIND_COMMENTS for missing value explanation
WDIRSTD
WDIRSTD
Standard deviation of wind direction
degreesfromnorth
0.1
real
0
Null
See WIND_COMMENTS for missing value explanation
WSPD
WSPD
Wind speed
metersPerSecond
0.1
real
0
Null
See WIND_COMMENTS for missing value explanation
WSPDMAX
WSPDMAX
Maximum wind speed
metersPerSecond
0.1
real
0
Null
See WIND_COMMENTS for missing value explanation
WSPDMIN
WSPDMIN
Minimum wind speed
metersPerSecond
0.1
real
0
Null
See WIND_COMMENTS for missing value explanation
WIND_COMMENTS
WIND_COMMENTS
Noted comments by the investigator about the particular measure of WIND_
string
Noted comments by the investigator about the particular measure of WIND_
HODM_ICET
HODM - Ice Temperature
HODM_ICET.csv
38325805
27
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/HODM_ICET.csv
IceT @ 20cm: 1993-1994 - 2002-2003: Campbell Scientific 107B temperature probe IceT @ 50cm: 2002-2003 - present: Fenwall Thermisters (192-102DEW-A01) and Caddock Tetrinox(TF050N) hi precision resistor (10Kohm) with +-5ppm/celcius and 0.01percent Resistor IceT @ 1m: 1993-1994 - 2002-2003: Campbell Scientific 107B temperature probe IceT @ 1m: 2002-2003 - present: Fenwall Thermisters (192-102DEW-A01) and Caddock Tetrinox(TF050N) hi precision resistor (10Kohm) with +-5ppm/celcius and 0.01percent Resistor
DATASET_CODE
DATASET_CODE
Code for given set of information for Howard Glacier meteorology station
string
Code for given set of information for Howard Glacier meteorology station
METLOCID
METLOCID
Location code for Howard Glacier meteorology station
string
Location code for Howard Glacier meteorology station
DATE_TIME
DATE_TIME
Date/time of sample (New Zealand DST, +13 UTC)
date
MM/DD/YYYY HH24:MI
ICET20CM
ICET20CM
Ice temperature at 20 cm depth
celsius
0.01
real
-70
0
Null
None given
ICET1M
ICET1M
Ice temperature at 1 meter depth
celsius
0.01
real
-70
0
Null
None given
ICET_COMMENTS
ICET_COMMENTS
Noted comments by the investigator about the particular measure of ICET_
string
Noted comments by the investigator about the particular measure of ICET_
ICET50CM
ICET50CM
Ice temperature at 50 cm depth
celsius
0.01
real
Null
None given
HODM_WVAPD
HODM - Water Vapor Density
HODM_WVAPD.csv
846520
27
1
\n
column
,
"
https://mcm.lternet.edu/sites/default/files/HODM_WVAPD.csv
DATASET_CODE
DATASET_CODE
Code for given set of information for Howard Glacier meteorology station
string
Code for given set of information for Howard Glacier meteorology station
METLOCID
METLOCID
Location code for Howard Glacier meteorology station
string
Location code for Howard Glacier meteorology station
DATE_TIME
DATE_TIME
Date/time of sample (New Zealand DST, +13 UTC)
date
MM/DD/YYYY HH24:MI
WVAPD
WVAPD
Water Vapor Density
gramspercubicmeter
0.1
real
Null
None given
WVAPD_COMMENTS
WVAPD_COMMENTS
Noted comments by the investigator about the particular measure of WVAPD_
string
Noted comments by the investigator about the particular measure of WVAPD_
ratio of two quantities as percent composition (1:100)