Everglades Water Chemistry - Surface water DOC, pore water DOC and SUVA data

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Aiken, George, 2002, Everglades Water Chemistry - Surface water DOC, pore water DOC and SUVA data.

   Online Links:

   • <http://sofia.usgs.gov/exchange/aiken/aikenchem.html>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -80.9

   East_Bounding_Coordinate: -80.1

   North_Bounding_Coordinate: 26.79

   South_Bounding_Coordinate: 25.59

3. What does it look like?

   <http://sofia.usgs.gov/publications/fs/186-96/map.gif> (GIF)

   south Florida DOC study area (darkened area)

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: Mar-1995

   Ending_Date: Jun-1998

   Currentness_Reference: ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: spreadsheet

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: SFWMD water conservation areas

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 1. Longitudes are given to the nearest 1. Latitude and longitude values are specified in Degrees, minutes, and decimal seconds.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.
      

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   Data available for surface water and DOC include site ID, date, DOC (mg.L) and SUVA (absorbance/mg C/L). Data for pore water also include sampling depth. Samples that had analytical results less that the detection limits of the selected methods are indicated in the dataset by the less than symbol.

   Entity_and_Attribute_Detail_Citation: USGS personnel

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • George Aiken

2. Who also contributed to the data set?

   Project personnel include Kenna Butler

3. To whom should users address questions about the data?
   George Aiken
   U.S. Geological Survey
   Project chief
   3215 Marine Street, Suite E-127
   Boulder, CO 80303
   

   303 541-3036 (voice)
   303 447-2505 (FAX)
   graiken@usgs.gov
   

Why was the data set created?

It is well recognized that the chemical forms of mercury in the water column and sediments are intimately related to bioaccumulation and body burden. Interactions of mercury and dissolved organic matter may play an important role in controlling the bioavailability and reactivity of mercury. The goal of our research is to provide information about the interactions of mercury and dissolved organic matter that will better define this important, albeit, poorly understood process. Ultimately, this research will lead to a more complete model of mercury behavior in the Everglades. Our research focused on the effect of DOC on the transport and reactivity of mercury in the Everglades through a combined field and laboratory study. The underlying hypothesis of this research is that the chemistry and structural characteristics of organic matter in the Everglades have a controlling influence on mercury cycling processes such as methylamine and volatilization.

The South Florida Water Management District, the U.S. Environmental Protection Agency, and the USGS South Florida Ecosystems Initiative have organized an intensive study of surface water chemistry in Southern Florida. In 1994, several onsite-research locations were selected in the Water Conservation Areas of the South Florida Water Management District in conjunction with this multidisciplinary, multiage research project.

How was the data set created?

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

   Date: Not complete (process 1 of 1)

   Samples from select sites (ENR, STA 2, WCA-1, WCA-2, and WCA-3) were collected in June 2005 and were analyzed. The samples are part of a long term monitoring effort to identify changes in the concentration and chemical reactivity of dissolved organic matter (DOM) in the Everglades.

   Surface water samples were collected at a single depth from 7 locations and at two depths at 3 locations. Marsh pore-water samples were collected at several depths below the sediment-water interface at 4 locations. Surface water samples were collected each pore-water sampling location. A replicate sample was collected to evaluate onsite-sampling variability. Distilled-water blank samples and standard reference water samples (SRWS) were submitted to the laboratory with the onsite samples and were analyzed concurrently with them. Reference samples were processed using the same procedures as the onsite samples.

   Person who carried out this activity:
   

   George Aiken
   U.S. Geological Survey
   Project chief
   3215 Marine Street, Suite E-127
   Boulder, CO 80303
   

   303 541-3036 (voice)
   303 447-2505 (FAX)
   graiken@usgs.gov
   

3. What similar or related data should the user be aware of?

   Haitzer, M. Aiken, G. R.; Ryan, J. N., 2002, Binding of Mercury (II) to Dissolved Organic Matter: The Role of the Mercury-to-DOM Concentration Ration: Environmental Science and Technology v. 36, American Chemical Society, Washington, DC.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/hg_dom_binding/>

   Other_Citation_Details:

   The entire paper is available from the Environmental Science and Technology Journal web site; however, a journal subscription is required.

   Benoit, J. M. Mason, R. P.; Gilmour, C. C, 2001, Constants for Mercury Binding by Dissolved Organic Matter Isolates from the Florida Everglades: Geochimica Et Cosmochimica Acta v. 65 no. 24, Geochemical Society (Elsevier Science, Ltd.), Oxford, United Kingdom.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/k_hgbinding>

   Ravichandran, M Aiken, G. R.; Ryan, J. N.; Redd, 1998, Enhanced Dissolution of Cinnabar (Mercuric Sulfide) by Dissolved Organic Matter Isolated from the Florida Everglades: Environmental Science and Technology v. 32, American Chemical Society, Washington, DC.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/dislncinnabar>

   Other_Citation_Details:

   Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.

   Reddy, M. M. Aiken, G. R., 2001, Fulvic acid-sulfide ion competition for mercury ion binding in the Florida Everglades: Water, Air and Soil Pollution v. 132, nos. 1-2, Kluwer Academic Publishers, Dordrecht, Netherlands.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/fulvicacid>

   Other_Citation_Details:

   Entire paper is available from the Water, Air, and Soil Pollution website. Journal membership is required.

   Drexel, R. Todd Haitzer, Markus; Ryan, Jo, 2002, Mercury (II) Sorption to Two Florida Everglades Peats: Evidence for Strong and Weak Binding and Competition by Dissolved Organic Matter Released from the Peat: Environmental Science and Technology v. 36 no.19, American Chemical Society, Washington, DC.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/merc_peat/>

   Other_Citation_Details:

   Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.

   Reddy, Michael M. Aiken, George R.; Schuster,, 1995, Summary of Data from Onsite and Laboratory Analyses of Surface Water and Marsh Porewater from South Florida Water Management District Conservation Areas, the Everglades, South Florida, March 1995: U.S. Geological Survey, Reston, VA.

   Online Links:

   • <http://sofia.usgs.gov/publications/reports/merc_carbon>

   Other_Citation_Details:

   Prepared in cooperation the South Florida Water Management District and the U.S. Environmental Protection Agency

   Ravichandran, M. Aiken, G. R.; Ryan, J. N.; Redd, 1999, Inhibition of precipitation and aggregation of Metacinnabar (mercuric sulfide) by dissolved organic matter isolated from the Florida Everglades: Environmental Science and Technology v. 33, n. 9, American Chemical Society, Washington, DC.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/inhibitnagg>

   Other_Citation_Details:

   Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.

   Haitzer, Markus Aiken, George R.; Ryan, Joseph , 2003, Binding of Mercury (II) to Aquatic Humic Substances: Influence of pH and Source of Humic Substances: Environmental Science and Technology v. 37, n. 11, Americal Chemical Society, Washington, DC.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/bind_hg_humic>

   Other_Citation_Details:

   Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal subscription is required for download.

   Waples, Jacob S. Nagy, Kathryn L.; Aiken, Ge, 2005, Dissolution of cinnabar (HgS) in the presence of natural organic matter: Geochimica et Cosmochimica Acta v. 69, n. 6, Geochemical Society (Elsevier Science, Ltd.), Oxon, United Kingdom.

   Other_Citation_Details:

   The entire article is available from the Geochimica et Cosmochimica website but journal membership is required.

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

2. How accurate are the geographic locations?

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   unknown

5. How consistent are the relationships among the observations, including topology?

   unavailable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none

Use_Constraints: none

1. Who distributes the data set? (Distributor 1 of 1)
   Heather S.Henkel
   U.S. Geological Survey
   600 Fourth St. South
   St. Petersburg, FL 33701
   USA
   

   727 803-8747 ext 3028 (voice)
   727 803-2030 (FAX)
   hhenkel@usgs.gov
   

2. What's the catalog number I need to order this data set?

   Surface Water DOC, Pore Water DOC, and Specific ultraviolet absorbance (SUVA) data

3. What legal disclaimers am I supposed to read?

   The data have no guarantees explicit or implied

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Excel (version unknown) Size: 0.59
     Network links:	<http://sofia.usgs.gov/exchange/aiken/aikenchem.html>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 06-Nov-2007

Metadata author:

Heather Henkel
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701
USA

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
sofia-metadata@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Mon Nov 05 14:02:14 2007