European Diatom Database-African Dataset

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Francoise Gasse
Publication_Date: Unknown
Title: European Diatom Database-African Dataset
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Newcastle upon Tyne, United Kingdom
Publisher: The University of Newcastle
Other_Citation_Details:
Online_Linkage: http://craticula.ncl.ac.uk/Eddi/jsp/datasetdesc.jsp?DatasetId=Africa
Description:
Abstract:
The European Diatom Database (EDDI) is a web-based information system designed to enhance the application of diatom analysis to problems of surface water acidification, eutrophication and climate change. The East African dataset and North African dataset were harmonized to construct a unified African data set. Transfer functions were developed from the subsequent training set for inferring past conductivity (r2= 0.87), pH (r2= 0.77), and ratios between alkali and alkaline earth metals (r2 = 0.81) and carbonate-bicarbonate and sulphate + chloride ions (r2 = 0,82) (Gasse et al., 1995) and the model has subsequently been applied to several diatom sequences to reconstruct lake chemistry (e.g. Fritz et al., 1999; Dagnachew et al., in press ; Chalie and Gasse, in press ; Gasse, 2001 ; Gasse, in press ; Verschuren et al., 2000 ).
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Barker, P., Telford, R., Gasse, F., & Th?venon, F.. in press. Late Pleistocene and Holocene paleohydrology of Lake Rukwa, Tanzania, inferred from diatom analysis. Palaeogeography, Palaeoclimatology, Palaeoecology. Chali?, F. and Gasse, F., in press. A 13,500 years diatom record from the tropical East African Rift Lake Abiyata (Ethiopia). Palaeogeogr., Palaeoclim., Palaeoecol.. Dagnachew Legesse, F. Gasse, O. Radakovitch, C. Vallet-Coulomb, R. Bonnefille, D. Verschuren, E. Gibert, P. Barker. Sous presse. Environmental nvironmental changes in a tropical lake (Abiyata, Ethiopia) during recent centuries. Palaeogeogr., Palaeoclim., Palaeoecol. Fritz S, Cumming B.F., Gasse F.,Laird K.R., 1999. Diatoms as indicators or Hydrologic and climatic change in saline lakes. In E. Stoermer and J.P. Smol (Eds.), The Diatoms: Applications to Environmental and Earth Science. Cambridge University Press, Cambridge, 41-72. Gasse, F., in press. Diatom-inferred salinity and oxygen isotopes in Holocene waterbodies of the Western Sahara and Sahel (Africa).Implications for climate and water resource variability, Quaternary Sciences Reviews. Gasse, F., Barker, Ph., Gell, P.A., Fritz, S.C. and Chali?, F., 1997 -Diatom-inferred salinity in palaeolakes, an indirect tracer of climate change. Quaternary Science Review, vol. 15:1-19. Gasse, F., 1998. Water resources variability in tropical and subtropical Africa in the past. In: E. Servat et al. (Eds), Water resources variability in Africa during the Xxth Century. IAHS, 252, 97-106. Gasse, F., 2000. Hydrological changes in the African tropics since the last glacial maximum ; Quaternary Sciences Reviews, 19, 189-211. Gasse, F., 2001. Perspectives. Hydrological Changes in Africa. Science, 293, 2259-2260. Verschuren, D., Laird, K.R. and Cumming, B.F., 2000. Rainfall and drought in equatorial east Africa during the past 1,100 years. Nature, 403: 410-414.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19600101
Ending_Date: 19861231
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 2.32
East_Bounding_Coordinate: 41.7
North_Bounding_Coordinate: 13.32
South_Bounding_Coordinate: -1.72
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES > LAKEWATER CHEMICAL DATA
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > ALKALINITY
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONDUCTIVITY
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > PH > LAKEWATER PH TRANSFER FUNCTION
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > TRACE METALS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENT CHEMISTRY > SURFACE SEDIMENT SAMPLES
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENTS > SURFACE SEDIMENT SAMPLES
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > DIATOMS
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > LAKES
Theme_Keyword: The European Diatom Database
Theme_Keyword: Surface-sediment Diatom Assemblages
Theme_Keyword: Surface Water Acidification
Theme_Keyword: Eutrophication
Theme_Keyword: Climate Change
Theme_Keyword: Plantae
Theme_Keyword: Plant
Theme_Keyword: Chromista
Theme_Keyword: Bacillariophyta
Theme_Keyword: Alkalinity
Theme_Keyword: Calcium
Theme_Keyword: Chloride
Theme_Keyword: Conductivity
Theme_Keyword: Magnesium
Theme_Keyword: Maximum Depth Of Lake
Theme_Keyword: Ph
Theme_Keyword: Potassium
Theme_Keyword: Salinity
Theme_Keyword: Silica
Theme_Keyword: Site Surface Area At Time Of Sampling
Theme_Keyword: Sodium
Theme_Keyword: Sulphate
Theme_Keyword: Total Phosphorus
Theme_Keyword: Water Depth Of Diatom Sample
Theme_Keyword: BIOTA
Theme_Keyword: ENVIRONMENT
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: INLAND WATERS
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > ETHIOPIA
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > KENYA
Place_Keyword: CONTINENT > AFRICA > WESTERN AFRICA > NIGER
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > UGANDA
Place_Keyword: CONTINENT > AFRICA
Place_Keyword: CONTINENT > AFRICA > EASTERN AFRICA > ETHIOPIA
Place_Keyword: CONTINENT > AFRICA > NORTHERN AFRICA
Access_Constraints: None
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: FRANCOISE GASSE
Contact_Person_Primary:
Contact_Person: STEPHEN JUGGINS
Contact_Position: TECHNICAL CONTACT
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: CNRS-CEREGE, Europole Mediterraneen de l'Arbois- BP80
City: Aix en Provence Cedex 04
Postal_Code: 13545
Country: France
Contact_Address:
Address_Type: Mailing and Physical Address
Address: University of Newcastle
Address: Department of Geography
Address: Newcastle upon Tyne
Address: NEI 7RU
Country: UNITED KINGDOM
Contact_Voice_Telephone: 33 4 42 97 15 70
Contact_Voice_Telephone: 44 191 222 8799
Contact_Facsimile_Telephone: 33 4 42 97 15 95
Contact_Facsimile_Telephone: 44 191 222 5421
Contact_Electronic_Mail_Address: gasse@cerege.fr
Contact_Electronic_Mail_Address: Stephen.Juggins@ncl.ac.uk
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The East African and North African data sets have been harmonized to construct a unified African data set.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U-NCL/EDDI > European Diatom Database, University of Newcastle, UK
Contact_Person: STEPHEN JUGGINS
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: University of Newcastle
Address: Department of Geography
Address: Newcastle upon Tyne
Address: NEI 7RU
Country: UNITED KINGDOM
Contact_Voice_Telephone: 44 191 222 8799
Contact_Facsimile_Telephone: 44 191 222 5421
Contact_Electronic_Mail_Address: Stephen.Juggins@ncl.ac.uk
Resource_Description: Africa
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://craticula.ncl.ac.uk/Eddi/jsp/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://craticula.ncl.ac.uk/Eddi/jsp/datasetdesc.js...
Access_Instructions:
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20020923
Metadata_Review_Date: 20121221
Metadata_Future_Review_Date: 20030923
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: TYLER B. STEVENS
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NASA Goddard Space Flight Center
Address: Global Change Master Directory
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: (301) 614-6898
Contact_Facsimile_Telephone: 301-614-5268
Contact_Electronic_Mail_Address: Tyler.B.Stevens@nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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