Identification_Information: Citation: Citation_Information: Originator: Virginia Garrison, U.S. Geological Survey Publication_Date: 20101015 Title: Concentrations of Semivolatile Organic Compounds Associated with African Dust Air Masses in Mali, Cape Verde, Trinidad and Tobago, and the U.S. Virgin Islands, 2001-2008 Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://pubs.usgs.gov/ds/571/data/SOCs_in_dry_dep_data.txt Description: Abstract: Hundreds of millions of tons of mineral dust are transported thousands of miles through the atmosphere from the Sahara and Sahel of Africa to the Caribbean and the Americas every year. As part of a larger investigation into the possible effects of African dust on coral reefs and human health, air samples were collected during African dust conditions in an African dust source region (Bamako and Kati, Republic of Mali), off the coast of West Africa (Sal Island, Republic of Cape Verde), and at downwind sites in the southeastern (Trinidad and Tobago) and northeastern Caribbean (St. Croix, U.S. Virgin Islands). Air samples were collected sporadically between December 2001 and August 2008 using high volume samplers. Samples were analyzed for 84 targeted semivolatile organic compounds (SOCs) including current use and historical pesticides and breakdown products, polycyclic aromatic hydrocarbons (PAHs) and breakdown products, and polychlorinated biphenyl (PCB) congeners. The dataset consists of blank-corrected concentrations of SOCs detected in 68 air and 2 dry deposition samples. Also included are the SOC detections in 28 associated field-laboratory blanks and the method detection limits. Purpose: The dataset was developed to elucidate the semivolatile organic compounds associated with African dust air masses and during non-dust conditions. Experiments to test the effects of those detected chemicals on marine organisms could then be designed and conducted. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20020319 - 20020517 Currentness_Reference: Observed and recorded in the field. Status: Progress: Complete Maintenance_and_Update_Frequency: Corrections will be made if errors are discovered. It is not anticipated that new data will be added. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -7.946800 East_Bounding_Coordinate: -7.946800 North_Bounding_Coordinate: 12.622200 South_Bounding_Coordinate: 12.622200 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: African dust Theme_Keyword: chemical contaminants Theme_Keyword: persistent organic contaminants Theme_Keyword: semivolatile organic compounds Theme_Keyword: polycyclic aromatic hydrocarbons Theme_Keyword: polychlorinated biphenyls Theme_Keyword: pesticides Place: Place_Keyword_Thesaurus: None Place_Keyword: Mali Access_Constraints: None. Use_Constraints: Any use of this dataset should acknowledge the U.S. Geological Survey as originator. Native_Data_Set_Environment: Microsoft Windows Vista Version 6.1 (Build 7600) ; ESRI ArcCatalog 9.3.1.3500 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 2 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Accuracy of analytical results was assessed using internal standards and surrogate recoveries for all samples. In addition, duplicate sample analytical results were compared. Logical_Consistency_Report: A standard dry deposition protocol was modified to include using glass marbles at the bottom of an aluminum pail, in an attempt to retain fine particulates under conditions of strong convective storms. Pails were placed on a rooftop to minimize collection of particles from the ground [in Badalabougou, Mali, which is in the Niger River Valley and across the River from Bamako]. Pails and marbles were solvent-rinsed with pesticide grade methanol and allowed to dry prior to sampling. The analytical laboratory used surrogates to determine recovery of different analytes using a specific method and internal standards and calibration curves in accordance with standard procedure in organic analysis. Completeness_Report: This dataset contains all data that passed the accuracy assessments. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Latitude and longitude at sampling sites were taken from Google Earth (2010). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Elevation at sampling sites was taken from Google Earth (2010). Lineage: Process_Step: Process_Description: Air samples were collected in the field by trained personnel. Samples were analyzed using extraction and analysis protocols as in Patton and others (1989), Zaugg and others (1995), Foreman and others (2000), Majewski and others (2000), Zaugg and others (2002). Calibration curves were run and analytical data (nanograms SOC per sample) were surrogate recovery corrected. Process_Date: 20020319 - 20020517 for field sample collection. Laboratory analysis of samples occurred from 20020915-20020930. Data were processed 20100105-20100228 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Virginia Garrison Contact_Organization: U.S. Geological Survey, St. Petersburg, FL Contact_Position: Marine Ecologist Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 803-8747 ext. 3061 Contact_Electronic_Mail_Address: ginger_garrison@usgs.gov Hours_of_Service: M-F, 8:30-5:00 EST Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: SOCs_in_dry_dep_data.txt Entity_Type_Definition: This dataset is composed of the concentrations of semivolatile organic compounds (nanograms per sample) detected in dry deposition samples from Bamako, Mali. Entity_Type_Definition_Source: These data are related to the SOCs_in_air dataset showing nanograms per cubic meter of air sampled in Bamako and Kati Mali. Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: sample ID Attribute_Definition: The four letters indicate the site and country (BKML is Bamako, Mali; EKML is Kati, Mali), the first four numbers represent the year, the following two numbers are the month, and the following two numbers are the day the sample began to be collected; the two numbers following the dash are the month, and the last two numbers are the date that the sampling ended. Attribute_Definition_Source: User defined Attribute_Domain_Values: Unrepresentable_Domain: User created own naming system to include area, time, date, and other valuable information to give each individual sample a unique identifier. Attribute: Attribute_Label: country Attribute_Definition: Country in which the sample was collected. Attribute_Definition_Source: User defined Attribute_Domain_Values: Unrepresentable_Domain: Country names based on CIA Factbook. Attribute: Attribute_Label: latitude Attribute_Definition: Decimal degrees above the equator based on WGS 1984 Attribute_Definition_Source: http://earth-info.nga.mil/GandG/publications/tr8350.2/tr8350_2.html Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 12.622200 Range_Domain_Maximum: 12.622200 Attribute: Attribute_Label: site Attribute_Definition: Area in the country where sample was collected Attribute_Definition_Source: User defined Attribute_Domain_Values: Unrepresentable_Domain: Area names based on CIA Factbook Attribute: Attribute_Label: elevation Attribute_Definition: Meters above sea level based on Google Earth Attribute_Definition_Source: http://www.google.com/earth/index.html Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8 Range_Domain_Maximum: 555 Attribute: Attribute_Label: longitude Attribute_Definition: Decimal degrees from prime meridian based on WGS 1984 Attribute_Definition_Source: WGS 1984 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -7.946800 Range_Domain_Maximum: -7.946800 Attribute: Attribute_Label: sampling date Attribute_Definition: Days, months, and year over which the sample was collected Attribute_Definition_Source: Gregorian calendar formated as dd-month abbreviation-yy Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18-MAR-02 Range_Domain_Maximum: 17-MAY-02 Attribute: Attribute_Label: dust Attribute_Definition: Y means yes the sample was collected under African dust conditions, N means no the sample was not collected under African dust conditions Attribute_Definition_Source: User defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Y Enumerated_Domain_Value_Definition: Yes the sample was collected under African dust conditions Enumerated_Domain_Value_Definition_Source: User defined Enumerated_Domain_Value: N Enumerated_Domain_Value_Definition: No the sample was not collected under African dust conditions Enumerated_Domain_Value_Definition_Source: User defined Attribute: Attribute_Label: lab analysis Attribute_Definition: Laboratory where samples were analyzed Attribute_Definition_Source: User defined Attribute_Domain_Values: Unrepresentable_Domain: Laboratory names based on names of scientists responsible for analysis in laboratories Attribute: Attribute_Label: sample collection Attribute_Definition: Person who collected the sample in the field Attribute_Definition_Source: User defined Attribute_Domain_Values: Unrepresentable_Domain: The last name of the individual collecting the sample. Attribute: Attribute_Label: chlorpyrifos Attribute_Definition: Nanograms of the pesticide with the chemical name of O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.2 Range_Domain_Maximum: 6.0 Attribute: Attribute_Label: particle weight g Attribute_Definition: grams of dust collected Attribute_Definition_Source: User defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1204 Range_Domain_Maximum: 0.3354 Attribute: Attribute_Label: o,p'DDD Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of o,p'-dichlorodiphenyldichloroethane detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7.4 Range_Domain_Maximum: 20.8 Attribute: Attribute_Label: o,p'DDE Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of o,p'-dichlorodiphenyldichloroethylene detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.3 Range_Domain_Maximum: 5.0 Attribute: Attribute_Label: p,p'DDD Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of p,p'-dichlorodiphenyldichloroethane detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15.2 Range_Domain_Maximum: 15.8 Attribute: Attribute_Label: o,p'DDT Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of o,p'-dichlorodiphenyltrichloroethane detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.3 Range_Domain_Maximum: 10.8 Attribute: Attribute_Label: p,p'DDE Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of p,p'-dichlorodiphenyldichloroethylene detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 62.6 Range_Domain_Maximum: 99.7 Attribute: Attribute_Label: endosulfan sulfate Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of 6,7,8,9,10,10-Hexachloro-1,5,5a,6,9,9a-hexahydro-,6,9-methano-2,4,3-benzodiozathiepin-3,3-dioxide sulfate detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 10.6 Range_Domain_Maximum: 154 Attribute: Attribute_Label: p,p'DDT Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of p,p'-dichlorodiphenyltrichloroethane detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.3 Range_Domain_Maximum: 11.0 Attribute: Attribute_Label: endosulfan 1 Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of the alpha isomer of 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepine-3-oxide detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.9 Range_Domain_Maximum: 17.8 Attribute: Attribute_Label: anthraquinone Attribute_Definition: Nanograms of the polycyclic aromatic hydrocarbon detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 101.0 Attribute: Attribute_Label: endosulfan 2 Attribute_Definition: Nanograms of the organochlorine pesticide with chemical name of beta isomer of 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepine-3-oxide detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 12.5 Range_Domain_Maximum: 64.9 Attribute: Attribute_Label: benzo (a) pyrene Attribute_Definition: Nanograms of the polycyclic aromatic hydrocarbon detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 243.0 Attribute: Attribute_Label: fluoranthene Attribute_Definition: Nanograms of the polycyclic aromatic hydrocarbon detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 403.0 Range_Domain_Maximum: 1311.0 Attribute: Attribute_Label: phenanthrene Attribute_Definition: Nanograms of the polycyclic aromatic hydrocarbon detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 587.0 Range_Domain_Maximum: 1104.0 Attribute: Attribute_Label: pyrene Attribute_Definition: Nanograms of the polycyclic aromatic hydrocarbon detected per gram of sample Attribute_Definition_Source: International Union of Pure and Applied Chemistry (IUPAC) name Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 285.0 Range_Domain_Maximum: 828.0 Distribution_Information: Resource_Description: Downloadable Data Standard_Order_Process: Fees: Free Digital_Form: Digital_Transfer_Option: Offline_Option: Offline_Media: DVD Recording_Format: DVD Digital_Transfer_Information: Format_Name: .txt Transfer_Size: 0.001 Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 803-8747 ext. 3129 Hours_of_Service: M-F, 8:30-5:00 EST Distribution_Liability: This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Metadata_Reference_Information: Metadata_Date: 20100916 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Virginia Garrison Contact_Address: Address_Type: 600 4th Street South City: St. Petersburg State_or_Province: Florida Postal_Code: 33701 Contact_Voice_Telephone: (727) 803-8747 ext. 3061 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile