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1. Geochronology in the South Florida Ecosystem and Associated Ecosystem Programs [USGS_SOFIA_metholms]
In order to manage an ecosystem, it is imperative to define the rate at which ecologic, physical and chemical changes have occurred. The lack of historical records documenting ecological changes dictates ...


2. Socioeconomic Data and Applications Center (SEDAC) Collection of Treaty Texts [CIESIN_SEDAC_ENTRI_TEXTS_COL]
The Socioeconomic Data and Applications Center (SEDAC) Collection of Treaty Texts consists of environmental treaty texts that are compiled in collaboration with the Columbia University Center for ...


3. LBA-ECO TG-09 Soil Isotopic C, N, H2O, and N2O Data, Tapajos National Forest, Brazil [LBA_TG09_N2O_SOILS]
This data set reports the results of carbon, nitrogen, and oxygen isotopic analyses of soil, soil water, and N2O soil gas samples; total soil carbon and nitrogen concentrations; and soil texture and ...


4. Occurrence and hydrochemistry of radiochemical constituents in groundwater of Jefferson County and surrounding areas, southwestern Montana, 2007 through 2010 [USGS_SIR-5235_MTGroundwater]
The U.S. Geological Survey, in cooperation with Jefferson County and the Jefferson Valley Conservation District, sampled groundwater in southwestern Montana to evaluate the occurrence and concentration ...


5. Florida Bay Cores Site Information [USGS_SOFIA_hlmscloc]
The dataset contains the core number, location, latitude/longitude, date collected, and core surface description for cores from Rabbitt Key, Cluett Key, Whipray Basin, Bob Allen Key, Rankin Bight, ...


6. Reformatted Data from the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program [NURE]   CHILD DIFs
From 1974 to 1980, the Federal Government systematically evaluated the uranium resources of the conterminous United States and Alaska. Earth science research in the National Uranium Resource Evaluation ...


7. Water-Quality Assessment of the Potomac River Basin: Water-Quality and Selected Spatial Data, 1992-1996 [CBP_PNAQWA]
The U.S. Geological Survey (USGS) implemented the National Water-Quality Assessment (NAWQA) Program to describe the status and trends in the quality of the Nation's surface water and ground water ...


8. Water Quality in the Yukon River Basin, Alaska, Water Years 2006-2008 [USGS_OFR_2010_1241]
The Yukon River Inter-Tribal Watershed Council and the U.S. Geological Survey developed a water-quality monitoring program to address a shared interest in the water quality of the Yukon River and ...


9. Data on freshwater and hydrochemistry in the Antarctic Peninsula region. [CNDP-ESP_GEOANT-UAM_Freshwater]   PARENT DIF
In English: Surface freshwater, snow and groundwater studies in the Antarctic Peninsula region and Ellsworth Mountains. Hydrochemical data. From projects of the research group on Geology of the University ...


10. Chronology and Isotope Geochemistry of Ground Waters in the Florida Keys and Offshore Areas [USGS_SOFIA_chron_isotope_geochem_FL_Keys]
This project involves sampling surface waters and ground waters from Florida Bay, the Keys, and offshore to the barrier reef. Analyses will be done on a variety of isotopic and chemical species that ...


11. Florida Bay Physical Data [USGS_SOFIA_hlms_physical_data]
The dataset contains the core number, depth (cm), wet bulk density, dry bulk density, accumulated dry bulk density, dry bulk fines, total % H2O content, % insoluble residue, % loss on ignition, coarse ...


12. Florida Bay Radiochemical data [USGS_SOFIA_hlms_radchem_data]
The datasets contains the core number, depth (cm), and Ra-226 activity(dpm/g) and Ra-226 error (dpm/g). The use of radioactive isotopes is founded on the known physical property of radioactive ...


13. Florida Bay core logs disposition and analysis parameters [USGS_SOFIA_hlmsclog]
The data set contains the core number, location, latitude/longitude, date collected, storage location, core surface description, and analyses for cores taken from Rabbitt Key, Cluett Key, Whipray ...


14. Florida Bay sample core log [USGS_SOFIA_hlmscsmp]
The data set contains fractions, intervals, location of sample, analyses, and sections with no sample remaining referenced to site name. The use of radioactive isotopes is founded on the known physical ...


15. Florida Bay sediment geochemical data [USGS_SOFIA_orem_fb_sed_geochem]
The data set contains the sample ID, depth (cm), sediment size, fine sediment fraction (<60m), total C %, organic C %, total N %, total P %, C/N, C/P, and N/P. This project is examining (1) sources ...


16. X-Radiographs Data [USGS_SOFIA_x-radio_data]
The x-radiographs of Florida Bay cores were used to examine the internal sediment structure of sediment contained in a core and assess whether the sediment was mixed. In order to manage an ecosystem, ...


17. Geochemical and geomorphological investigations of the McMurdo Dry Valleys freshwater and saline water bodies [K211_1963_1987_NZ_1]   CHILD DIFs
Since the 1963-1964 season, Japanese scientists have studied major and trace elements, nutrient matter, stable and radioactive isotopes and organic constituents in lakes and ponds and geological samples ...


18. Geochemical studies, the natural abundance of nitrogen isotopes in soil and evaporates and observations of the sequential changes in the saline lakes of the Dry Valleys and surrounding areas [K211_1978_1979_NZ_1]   PARENT DIF
Geochemical studies on the tritium chronology of Lake Vanda, the natural abundance of nitrogen isotopes in soil and evaporites in the Dry Valleys and observations of the sequential changes in the ...


19. Geophysical studies of Lake Vanda, Wright Valley, including lake water and ice parameters and geomorphological studies of the surrounding physical environment with comparisons with other nearby water bodies [K211_1970_1973_NZ_1]   PARENT DIF
A geophysical study of Lake Vanda, Wright Valley was conducted over three seasons focussing on the heat balance of the lake with geochemical and geomorphological studies running concurrently. Comparisons ...


20. Limnological studies of Dry Valley lakes: water parameters (pH, conductivity, nutrients, temperature), uranium content, trace elements, isotopic ratio and tritium concentrations, and geochemical samples [K211_1984_1986_NZ_1]   PARENT DIF
A large number of saline and freshwater lakes and ponds of the Dry Valley area and crater lakes behind the McMurdo station were visited for limnological study including Lake Fryxell of the Taylor ...


21. Measurements of environmental radiation near Scott Base and McMurdo Station and in the McMurdo Dry Valleys [K211_1984_1985_NZ_1]   PARENT DIF
The level of environmental radiation (gamma ray exposure) due to terrestrial radionuclides was measured by using a portable NaI gamma ray survey meter in the Ross Island (near Scott Base and McMurdo ...


22. Ground-Water Quality in the Mohawk River Basin, New York, 2006 [USGS_OFR_2008_1086]
Water samples were collected from 27 wells from August through November 2006 to characterize ground-water quality in the Mohawk River Basin. The Mohawk River Basin covers 3,500 square miles in central ...


23. Geochemical Data from Produced Water Contamination Investigations: Osage-Skiatook Petroleum Environmental Research (OSPER) Sites, Osage County, Oklahoma [USGS_OFR_2007_1055]
The USGS reports chemical and isotopic analyses of 345 water samples collected from the Osage-Skiatook Petroleum Environmental Research (OSPER) project. Water samples were collected as part of an ...


24. Circulation and Physical Processes within the San Gabriel River Estuary During Summer 2005 [USGS_OFR_2007_1011]
The Southern California Coastal Water Research Project (SCCWRP) is developing a hydrodynamic model of the SGR estuary, which is part of the comprehensive water-quality model of the SGR estuary and ...


25. Trans-Atlantic Study of Calanus: Comparative Time Series Sampling Programme [GLOBEC_078_TASC_011]   PARENT DIF
The objective of this subtask of the Trans-Atlantic Study of Calanus (TASC) programme was to describe the annual cycle of vertical distribution, generational development and overwintering of C. finmarchicus ...


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