Daily measurement summaries from Howard Glacier Meteorological Station (HODM), McMurdo Dry Valleys, Antarctica (1993-2022, ongoing)

Summary

Abstract: 

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 daily measurement summaries derived from 15-minute data generated by 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.

Date Range: 

November 20, 1993 to December 19, 2022
Data Citation
Doran, P.T., Fountain, A.G. 2023. Daily measurement summaries from Howard Glacier Meteorological Station (HODM), McMurdo Dry Valleys, Antarctica (1993-2022, ongoing). Environmental Data Initiative. DOI: 10.6073/pasta/4fbeab577cbfc61035f8eba7875e1cc0. Dataset accessed 19 April 2024.
Dataset(s)

Description: 

HODM - Air Temperature (Daily)

Variables (click to expand): 

METLOCID
  • Label:
  • Definition: Location code for this met station
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date_time
  • Definition: Date sample was collected
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values:
    • Required entry = None given
AVG_AIRT1M
  • Label:
  • Definition: Average of air temperature at 1 m
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_AIRT1M
  • Label:
  • Definition: Standard deviation of the air temperature distribution at 1 m
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_AIRT1M
  • Label:
  • Definition: Minimum value of the air temperature at 1 m
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_AIRT1M
  • Label:
  • Definition: Maximum of the air temperature at 1 m
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_AIRT1M
  • Label:
  • Definition: Number of observations for this average
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
AVG_AIRT3M
  • Label:
  • Definition: Average air temperature at 3 m above ground
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_AIRT3M
  • Label:
  • Definition: Standard deviation for the air temperature at 3 m above ground
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_AIRT3M
  • Label:
  • Definition: Minimum value of the air temperature at 3 m above ground
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_AIRT3M
  • Label:
  • Definition: Maximum value for the air temperature at 1.3 m above ground
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_AIRT3M
  • Label:
  • Definition: Number of observations for this average
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_COMMENTS
  • Label:
  • Definition: Number of observations of the measuremetns used for these statistics
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given

File: 

mcmlter-clim-hodm_airt-daily-20230706.csv (939.3 KB)

Description: 

HODM - Ice Surface Change (Daily)

Variables (click to expand): 

METLOCID
  • Label:
  • Definition: Location code for this met station.
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date_time
  • Definition: Date sample was collected
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values:
    • Required entry = None given
AVG_ICESURFCHANGE_CM
  • Label:
  • Definition: Average Ice surface change
  • Type: Physical quantity
  • Unit: centimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STDDEV_ICESURFCHANGE_CM
  • Label:
  • Definition: Standard deviation for the Ice surface change
  • Type: Physical quantity
  • Unit: centimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_ICESURFCHANGE_CM
  • Label:
  • Definition: Minimum value of the Ice surface change
  • Type: Physical quantity
  • Unit: centimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_ICESURFCHANGE_CM
  • Label:
  • Definition: Maximum daily value for the Ice surface temperature thermal infrared
  • Type: Physical quantity
  • Unit: centimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_ICESURFCHANGE_CM
  • Label:
  • Definition: Number of observations for this average
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_COMMENTS
  • Label:
  • Definition: Number of comments about the measurement in this period
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

File: 

mcmlter-clim-hodm_icesurf-daily-20230706.csv (344.54 KB)

Description: 

HODM - Solar Radiation (Daily)

Variables (click to expand): 

METLOCID
  • Label:
  • Definition: Location code for this met station
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date_time
  • Definition: Date sample was collected
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values: None specified
AVG_LWRADIN
  • Label:
  • Definition: Average of the long wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_LWRADIN
  • Label:
  • Definition: Standard deviation for the long wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_LWRADIN
  • Label:
  • Definition: Minimum value of the long wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_LWRADIN
  • Label:
  • Definition: Maximum value for the long wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_LWRADIN
  • Label:
  • Definition: Number of observations for the long wave incoming radiation statistics
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
AVG_SWRADIN
  • Label:
  • Definition: Average for the short wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_SWRADIN
  • Label:
  • Definition: Standard deviation for the short wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_SWRADIN
  • Label:
  • Definition: Minimum value of the short wave incoming radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_SWRADIN
  • Label:
  • Definition: Maximum incoming shortwave radiation/solar flux
  • Type: Physical quantity
  • Unit: W/m2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.1
  • Missing values:
    • Null = None given
N_SWRADIN
  • Label: Number of Observations
  • Definition: Number of observations for the derived data statistics.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
AVG_SWRADOUT
  • Label:
  • Definition: Average for the short wave outbound radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_SWRADOUT
  • Label:
  • Definition: standard devation of the the short wave outbound radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_SWRADOUT
  • Label:
  • Definition: Minimum of the short wave outbound radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_SWRADOUT
  • Label:
  • Definition: Maximum of the short wave outbound radiation
  • Type: Physical quantity
  • Unit: W/m^2
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_SWRADOUT
  • Label:
  • Definition: Number of observations the short wave outbound radiation
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_COMMENTS
  • Label:
  • Definition: Number of comments about the measurement in this period
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

File: 

mcmlter-clim-hodm_radn-daily-20230706.csv (891.83 KB)

Description: 

HODM - Relative Humidity (Daily)

Variables (click to expand): 

METLOCID
  • Label:
  • Definition: Location code for this met station
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date_time
  • Definition: Date sample was collected
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values:
    • Required entry = None given
AVG_RH
  • Label:
  • Definition: Average of the relative humidity values
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
STD_RH
  • Label: Standard Dev. of RH
  • Definition: The standard deviation for the distribution of daily rel. humidity values
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MIN_RH
  • Label: Minimum RH
  • Definition: The minimum of the relative humidity
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MAX_RH
  • Label: Maximum RH
  • Definition: The maximum of the relative humidity
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_RH
  • Label: Number of Observations
  • Definition: Number of observations for the daily stats.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
AVG_RH1M
  • Label:
  • Definition: Average of the relative humidity at 1meter values
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
STD_RH1M
  • Label:
  • Definition: The standard deviation for the distribution of rel. humidity values at 1m
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MIN_RH1M
  • Label: Minimum RH
  • Definition: The minimum of the relative humidity at 1m
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MAX_RH1M
  • Label: Maximum RH
  • Definition: The maximum of the relative humidity at 1m.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_RH1M
  • Label: Number of Observations
  • Definition: Number of observations for the daily stats.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_COMMENTS
  • Label:
  • Definition: Number of comments about the measurement in this period
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

File: 

mcmlter-clim-hodm_rh-daily-20230706.csv (641.72 KB)

Description: 

HODM - Wind Speed (Daily)

Variables (click to expand): 

METLOCID
  • Label:
  • Definition: METLOCID identification code for the meteorological station
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label:
  • Definition: Date when measurement was taken
  • Type: Date/time
  • Date format: DD/MM/YYYY
  • Missing values: None specified
AVG_WSPD
  • Label:
  • Definition: Average of the values of the wind speed
  • Type: Physical quantity
  • Unit: metersPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
STDDEV_WSPD
  • Label:
  • Definition: Standard deviation of the distribution of the wind speed
  • Type: Physical quantity
  • Unit: metersPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MIN_WSPD
  • Label:
  • Definition: Minimum value of the wind speed for the period.
  • Type: Physical quantity
  • Unit: metersPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MAX_WSPD
  • Label:
  • Definition: Maximum value of the wind speed for the period
  • Type: Physical quantity
  • Unit: metersPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_WSPD
  • Label:
  • Definition: Number of data points used to calculate these statistics.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
N_COMMENTS
  • Label:
  • Definition: N_COMMENTS
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

File: 

mcmlter-clim-hodm_wspd-daily-20230706.csv (500.54 KB)

Description: 

HODM - Ice Temperature (Daily)

Variables (click to expand): 

METLOCID
  • Label:
  • Definition: Location code for Howard glacier meteorology station
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label:
  • Definition: Date/time of sample (New Zealand DST, +13 UTC)
  • Type: Date/time
  • Date format: DD/MM/YYYY
  • Missing values: None specified
AVG_ICET20CM
  • Label:
  • Definition: Ice temperature daily average at 20cm
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_ICET20CM
  • Label:
  • Definition: Standard deviation of the Ice temperature distribution at 20 cm depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_ICET20CM
  • Label:
  • Definition: Minimum daily of the ice temperature at 20 cm depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_ICET20CM
  • Label:
  • Definition: Maximum ice temperature at 20cm
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_ICET20CM
  • Label:
  • Definition: number of data points used in the stats. for ce temperature at 20cm
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
AVG_ICET1M
  • Label:
  • Definition: daily average for the Ice temperature at 1 meter depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
STD_ICET1M
  • Label:
  • Definition: standard deviation of distribution of the Ice temperature at 1 meter depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MIN_ICET1M
  • Label:
  • Definition: Daily minimum of the Ice temperature at 1 meter depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_ICET1M
  • Label:
  • Definition: Daily maximum of the ice temperature at 1 meter depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_ICET1M
  • Label: Number of Observations
  • Definition: Number of observations for the daily stats.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
AVG_ICET50CM
  • Label:
  • Definition: Ice temperature daily average at 50 cm depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • Null = None given
STD_ICET50CM
  • Label:
  • Definition: Ice temperature standard deviation of daily distribution at 50 cm depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MIN_ICET50CM
  • Label:
  • Definition: Daily minimum of Ice temperature at 50 centimeters depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
MAX_ICET50CM
  • Label:
  • Definition: Daily maximum of Ice temperature at 50 centimeters depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_ICET50CM
  • Label:
  • Definition: Ice temperature at 50 cm depth
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 0.01
  • Missing values:
    • Null = None given
N_COMMENTS
  • Label:
  • Definition: Number of comments by the investigator about the particular measure of ICET_
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

File: 

HODM_ICET_DAILY.csv (570.75 KB)

Short name: 

HODM_DAILY

Dataset ID: 

7112
People

Principal Investigator(s): 

Peter T. Doran
Andrew G. Fountain

Contact: 

McMurdo Dry Valleys LTER Information Manager

Associated Personnel: 

Field Technician
Krista F. Myers
Data Manager
Renée F. Brown
Former Field Crew
Maciej K. Obryk
Former Field Crew
Hassan Basagic
Former Field Crew
Thomas Nylen
Former Data Manager
Inigo San Gil
Related

Related publications: 

McMurdo Dry Valleys Long-Term Ecological Research (LTER): LTER automatic weather network (LAWN)

Related links: 

Meteorological Task Lists
Methodology

Methods: 

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:
    
  
 

Quality Assurance: 

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.

Additional information: 

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

Categories

Research Section: 

LTER Core Areas: 

MCM Keywords: 

Keywords: 

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