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 is the total iodine content and I-129 isotopic composition of lake-bottom sediments from Lakes Joyce and Fryxell. An attempt was made to determine the iodine and chlorine isotopic content of gypsum cored from the bottom of Lake Vanda, but the total iodine content was below detection.
Date Range:
December 21, 2005
to
December 27, 2005
Dataset(s)
Description:
This is the description of the spreadsheet fo the iodine study, with columns description and units used
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:
Definition:
Average sediment depth in centimeters below the lake floo
Type:
Physical quantity
Unit:
centimeter
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
Null = None given
I(umol/kg)
Label:
Definition:
Total sedimentary iodine content in micromoles per kilogram
Type:
Physical quantity
Unit:
umol/kg
Maximum:
545
Minimum:
2.32
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
129I/I(E-15)
Label:
Definition:
Molar ratio of I-129 to total iodine (10^-15)
Type:
Physical quantity
Unit:
dimensionless
Maximum:
12929
Minimum:
216
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:
3454
Minimum:
49.02
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:
142.7
Minimum:
0.39
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:
38.07
Minimum:
0.09
Precision:
Not specified
Missing values:
NULL = None given
File:
ANCILLARY_SNYDER_IODINESED.csv
(2.7 KB)
Short name:
snyder_iodinesed
Dataset ID:
6002
People
Principal Investigator(s):
Glen Snyder
W. Berry Lyons
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/iodine-content-and-i-129-isotopic-composition-mcmurdo-lake-bottom-sediments