Published on
McMurdo Dry Valleys LTER
(
https://mcm.lternet.edu
)
Summary
Abstract:
As part of a collaborative investigation between researchers at Rice University, Arkansas State University, University of Rochester, and Ohio State University, lakes of the McMurdo Dry Valleys were sampled at discreet depth intervals during the 2005-2006 field season. Sample splits were subsequently analyzed for chemical and isotopic composition of both gases and dissolved ions, as well as dissolved organic carbon. In addition, cryogenic salts were sampled in the surrounding lake shores in order to determine the salt sources. Gravity cores were also obtained and the pore waters were collected by centrifuging the wet sediment.
Presented in this file are the dissolved halogens :chloride, bromide, and total iodine in lake waters and pore waters. The isotopic composition of I-129 and Cl-36 are also presented for these same samples, as are the molar ratios of I-129/I-127, and Cl-36/Cl-37. Alkalinity was also determined in order to subsequently investigate the relationship between the oxidation of organic matter and the release of iodine into the lake waters.
Date Range:
December 9, 2005
to
January 7, 2006
Dataset(s)
Description:
units and column description
Variables (click to expand):
DATASET_CODE
Label:
Definition:
Table Identifier
Type:
Nominal
Missing values:
None specified
LOCATION_NAME
Label:
Location Name
Definition:
Name of lake where measurement was made
Type:
Nominal
Missing values:
None specified
LOCATION_TYPE
Label:
Definition:
Sample type description and/or location
Type:
Nominal
Missing values:
None specified
SAMPLE_ID
Label:
Definition:
Sample identification code
Type:
Nominal
Missing values:
None specified
LATITUDE
Label:
Definition:
Sample Latitude
Type:
Physical quantity
Unit:
degree
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
Null = None given
LONGITUDE
Label:
Definition:
Sample Longitude
Type:
Physical quantity
Unit:
degree
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
Null = None given
DATE_TIME
Label:
Definition:
Date sample was collected
Type:
Date/time
Date format:
mm/dd/yyyy
Missing values:
None specified
DEPTH (m)
Label:
Depth
Definition:
Stream, pond, or lake depth. In the case of ice-covered lakes, depth is in meters below the upper ice surface.
Type:
Physical quantity
Unit:
meter
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
Null = None given
alk (meq/L)
Label:
Definition:
Alkalinity in milliequivalents per liter
Type:
Physical quantity
Unit:
meq/L
Maximum:
62.17
Minimum:
0.49
Precision:
Not specified
Missing values:
NULL = None given
I (umol/kg)
Label:
Definition:
Total dissolved iodine in micromoles per kilogram
Type:
Physical quantity
Unit:
umol/kg
Maximum:
8.109
Minimum:
0.004
Precision:
Not specified
Missing values:
NULL = None given
Br (umol/kg)
Label:
Definition:
Total dissolved bromine in micromoles per kilogram
Type:
Physical quantity
Unit:
umol/kg
Maximum:
5041.977
Minimum:
0.267
Precision:
Not specified
Missing values:
NULL = None given
Cl (mM)
Label:
Definition:
Dissolved chloride in millimoles per liter
Type:
Physical quantity
Unit:
mM
Maximum:
18178.8
Minimum:
0.16
Precision:
Not specified
Missing values:
NULL = None given
129I/I(E-15)
Label:
Definition:
Molar ratio of I-129 to total iodine (10^-15)
Type:
Physical quantity
Unit:
dimensionless
Maximum:
2163
Minimum:
445
Precision:
Not specified
Missing values:
NULL = None given
+/-129I/I(E-15)
Label:
Definition:
1-sigma error in molar ratios of I-129/I-127 (10^-15)
Type:
Physical quantity
Unit:
dimensionless
Maximum:
612.65
Minimum:
44.86
Precision:
Not specified
Missing values:
NULL = None given
129I(at/uL)
Label:
Definition:
Concentration of I-129 in atoms per microliter
Type:
Physical quantity
Unit:
at/uL
Maximum:
0.823
Minimum:
0.0416
Precision:
Not specified
Missing values:
NULL = None given
+/-129I(at/uL)
Label:
Definition:
1-sigma error for I-129 concentration
Type:
Physical quantity
Unit:
dimensionless
Maximum:
0.0032
Minimum:
0.2290
Precision:
Not specified
Missing values:
NULL = None given
36Cl/Cl(E-15)
Label:
Definition:
Molar ratio of Cl-36 to Cl-37 (10^-15)
Type:
Physical quantity
Unit:
dimensionless
Maximum:
6.36
Minimum:
0.93
Precision:
Not specified
Missing values:
NULL = None given
+/-36Cl/Cl(E-15)
Label:
Definition:
1-sigma error in molar ratios of Cl-36/Cl-37 (10^-15)
Type:
Physical quantity
Unit:
dimensionless
Maximum:
17.95
Minimum:
0.93
Precision:
Not specified
Missing values:
NULL = None given
36Cl(at/uL)
Label:
Definition:
Concentration of Cl-36 in atoms per microliter
Type:
Physical quantity
Unit:
at/uL
Maximum:
1.0
Minimum:
0.0
Precision:
Not specified
Missing values:
NULL = None given
+/-36Cl/Cl(at/uL)
Label:
Definition:
1-sigma error for 36Cl concentration
Type:
Physical quantity
Unit:
dimensionless
Maximum:
1.0
Minimum:
0.0
Precision:
Not specified
Missing values:
NULL = None given
DEPTH MASL
Label:
Definition:
Depth referred to the Sea level. Distance below Mean Average Sea water level reference from which sample was drawn
Type:
Physical quantity
Unit:
meter
Maximum:
Not specified
Minimum:
Not specified
Precision:
1
Missing values:
None specified
File:
ANCILLARY_SNYDER_HALOGENCHEM.csv
(11.23 KB)
Short name:
snyder_halogenchem
Dataset ID:
6001
People
Principal Investigator(s):
Glen Snyder
Contact:
McMurdo Dry Valleys LTER
Associated Personnel:
Data Manager
Chris Gardner
Data Manager
Inigo San Gil
Related
Related publications:
Dating water and solute additions to ice-covered Antarctic lakes
Halogen geochemistry of the McMurdo Dry Valleys Lakes, Antarctica: clues to the origin of solutes and lake evolution
Source URL:
https://mcm.lternet.edu/content/halogen-chemistry-and-isotopic-composition-mcmurdo-lake-waters-and-pore-fluids