26 datasets

NASA Earthdata CMR2021 · collection

This data set contains chemical parameters determined for marine sediment samples collected in the 2014-15 summer field season as part of the Thala Valley Long term Monitoring (TV-LTM) project. The aim of this project is to examine changes in the marine benthic ecosystem in the vicinity of Casey station following clean-up of the abandoned Thala Valley waste disposal ('tip') site in 2003-04. The ch

NASA Earthdata CMR2020 · collection

This dataset contains results of toxicity tests with early life stages of the sea urchin Sterechinus neumayeri as part of the AAS Project 3054 'Ecological risks from oil products used in Antarctica: characterising hydrocarbon behaviour and assessing toxicity on sensitive early life stages of Antarctic marine invertebrates.' Dataset consists of excel spreadsheets with separate spreadsheets for each

NASA Earthdata CMR2020 · collection

Experiments were done to quantify the Total Hydrocarbon Content (THC) in water accommodated fractions (WAF) of three fuels; Special Antarctic Blend diesel (SAB), Marine Gas Oil diesel (MGO) and an intermediate grade of marine bunker Fuel Oil (IFO 180).These tests measured the hydrocarbon content in freshly decanted WAFs and the resulting loss of hydrocarbons over time when WAFs were exposed in tem

NASA Earthdata CMR2019 · collection

This metadata record contains the results from bioassays conducted to show the response of the common Antarctic amphipod, Paramoera walkeri to contamination from combinations of Special Antarctic Blend (SAB) diesel, Marine Gas Oil (MGO) and Intermediate Fuel Oil (IFO 180), chemically dispersed with fuel dispersants Ardrox 6120 and Slickgone NS. Fuel only water accommodated fractions (WAF), chemica

NASA Earthdata CMR2019 · collection

This metadata record contains the results from bioassays conducted to show the response of an Antarctic nemertean Antarctonemertes unilineata to contamination from combinations of Special Antarctic Blend (SAB) diesel, Marine Gas Oil (MGO) and Intermediate Fuel Oil (IFO 180), chemically dispersed with fuel dispersants Ardrox 6120, Slickgone LTSW and Slickgone NS. Note that the corresponding PhD the

NASA Earthdata CMR2019 · collection

Seeds of twelve plant species were collected from Macquarie Island during January and February 2013. The seeds were used in a series of laboratory-based tests during 2013, at the University of Wollongong. Tests were conducted to determine species suitably for use in laboratory-based toxicity testing, using germination success and seedling growth (shoot and root length) as end points. Two soil type

NASA Earthdata CMR + NASA Data Portal2012 · Image data

This data set reports measurements of trace gas fluxes of methane (CH4), nitric oxide (N2O), nitrous oxide (NO), carbon dioxide (CO2) from soils at a study site in the Tapajos National Forest (TNF), near the km 83 on the Santarem-Cuiaba Highway south of Santarem, Para, Brazil. Data for root mass and carbon content, soil nitrogen (N), nitrification, and moisture content are also provided. There are

NASA Earthdata CMR + NASA Data Portal2011 · Image data

This data set reports methane (CH4) fluxes at the water-air interface and concentrations and isotopic signals of CH4 in the bubbles stirred up from the sediment in Tucurui and Samuel reservoirs in 2000 and 2001. Tucurui (deep) reservoir is located near Belem city in the Tocantins-Araguaia basin in the eastern Amazon. Samuel (shallow) reservoir is situated near Porto Velho city in the Jamari River,

NASA Earthdata CMR + NASA Data Portal2011 · Image data

This data set reports the microbial biomass in soil samples collected from the Cerrado, a woodlands-savannah area, in Brasilia, Brazil. Microbial biomass was determined as the total concentration of phospholipid fatty acids (PLFAs). Soil samples (0-5 cm) were collected from June, 2000 to June, 2001 in two native areas of Cerrado that were subjected to a range of fire regimes. Two plots were protec

NASA Earthdata CMR + NASA Data Portal2011 · Image data

This International Satellite Land Surface Climatology Project (ISLSCP II) data set, ISLSCP II Carbon Dioxide Flux at Harvard Forest and Northern BOREAS Sites, contains gapp-filled flux and meterological data for half-hourly, daily, weekly, monthly, and annual time intervals presented for each site and year. The 1992-1995 Harvard Forest, MA site, and the 1994-95 Old Black Spruce, Alberta, Canada si

NASA Earthdata CMR + NASA Data Portal2011 · Image data

Trace gas fluxes of carbon dioxide, methane, nitrous oxide, and nitric oxide (CO2, CH4, N2O, and NO) from surface soil were measured manually in an undisturbed forest at the Tapajos National Forest Seca-Floresta Site, which is within the footprint of the km 67 eddy flux tower. Measurements were made in January 2000 through April 2004, approximately twice per month. On each sampling date, up to fou

NASA Earthdata CMR + NASA Data Portal2009 · Image data

Fires set for slash-and-burn agriculture contribute to the current unsustainable accumulation of atmospheric greenhouse gases, and they also deplete the soil of essential nutrients, which compromises agricultural sustainability at local scales. Integrated assessments of greenhouse gas emissions have compared intensive cropping systems in industrialized countries, but such assessments have not been

NASA Earthdata CMR + NASA Data Portal2009 · Image data

Changes in land-use and climate are likely to alter moisture and substrate availability in tropical forest soils, but quantitative assessment of the role of resource constraints as regulators of soil trace gas fluxes is rather limited. The primary objective of this study was to quantify the effects of moisture and substrate availability on soil trace gas fluxes in an Amazonian regrowth forest. We

NASA Earthdata CMR + NASA Data Portal2009 · Image data

Moist tropical forests in Amazonia and elsewhere are subjected to increasingly severe drought episodes through the El Nino-Southern Oscillation (ENSO) and possibly through deforestation-driven reductions in rainfall. The effects of this trend on tropical forest canopy dynamics, emissions of greenhouse gases, and other ecological functions are potentially large but poorly understood. We established

NASA Earthdata CMR + NASA Data Portal2009 · Image data

Understanding secondary successional processes in Amazonian terrestrial ecosystems is becoming increasingly important as continued deforestation expands the area that has become secondary forest, or at least has been through a recent phase of secondary forest growth. Most Amazonian soils are highly weathered and relatively nutrient poor, but the role of nutrients as a factor determining succession

NASA Earthdata CMR + NASA Data Portal2009 · Image data

Selective logging is an extensive land use in the Brazilian Amazon region. We studied the soil-atmosphere fluxes of nitrous oxide (N2O), nitric oxide (NO), methane (CH4), and carbon dioxide (CO2) on two soil types (clay Oxisol and sandy loam Ultisol) over two years (2000-2001)in both undisturbed forest and forest recently logged using reduced impact forest management in the Tapajos National Forest

NASA Earthdata CMR + NASA Data Portal2009 · Image data

We conducted an experiment on sand and clay tropical forest soils to test the short-term effect of root mortality on the soil-atmosphere flux of nitrous oxide, nitric oxide, methane, and carbon dioxide. We induced root mortality by isolating blocks of land to 1 m using trenching and root exclusion screening. Gas fluxes were measured weekly for ten weeks following the trenching treatment. For nitro

NASA Earthdata CMR2006 · collection

Evaporation Model for hydrocarbon spills. Developed by the Australian Antarctic Division to simulate fractionation of Special Antarctic Blend (SAB) and other diesel range fuels during evaporation. Text version of notes for excel model, please read me. This Package of files includes a pdf of the scientific paper, a readme word document and 3 excel files. The purpose of the 3 excel files are as foll

NASA Earthdata CMR + NASA Data Portal1999 · Image data

The BOREAS TF-11 team gathered a variety of data to complement their tower flux measurements collected at the SSA Fen site. The data described in this document were made by the TF-11 team at the SSA Fen site to quantify the effect that the films observed to form on open water surfaces had on the transfer of carbon dioxide and methane from the water to the air. Measurements of fluxes of carbon diox

NASA Earthdata CMR + NASA Data Portal1999 · Image data

THE BOREAS TGB-09 team collected data in order to inventory and quantify the anthropogenic and biogenic NMHC's over the BOREAS study areas. This data set contains concentration and mixing ratio values for several NMHC's collected at the BOREAS SSA from 27-MAY-1994 to 15-SEP-1994.

NASA Earthdata CMR + NASA Data Portal1999 · Image data

The BOREAS TGB-01 team made numerous measurements of trace gas concentrations and fluxes at various NSA sites. This data set contains half-hourly averages of ambient methane (CH4) measurements and calculated fluxes for the NSA-TF in 1996 and the NSA-BP and NSA-OJP tower sites in 1994. The purpose of this study was to determine the CH4 flux from the study area by measuring ambient CH4 concentration

NASA Earthdata CMR + NASA Data Portal1999 · Image data

The BOREAS TF-11 team collected several data sets in their efforts to fully describe the flux and site characteristics at the SSA-Fen site. This data set contains temperature, pH, and concentration profiles of methane and carbon dioxide within the surface 50 cm of peat. The measurements were conducted as part of a 2x2 factorial experiment in which we added carbon (300 g m-2 as wheat straw) and nit

NASA Earthdata CMR + NASA Data Portal1999 · Image data

The BOREAS TF-04 team measured fluxes of carbon dioxide (CO2) and methane (CH4) across the soil-air interface in four ages of jack pine forest at the Southern Study Area of the Boreal Ecosystem Atmosphere Study (BOREAS) during August 1993 to March 1995. Gross and net flux of CO2 and flux of CH4 between soil and air are presented for 24 chamber sites in mature jack pine forest, 20-year old, 4- year

NASA Earthdata CMR + NASA Data Portal1999 · Image data

The BOREAS TGB-01 team made numerous measurements of trace gas concentrations and fluxes at various NSA sites. This data set contains methane (CH4) and carbon dioxide (CO2) concentrations in soil profiles from the NSA-OJP, NSA-OBS, NSA-YJP, and NSA-BP sites during the period of 23-May to 20-Sep-1994. The soil gas sampling profiles of CH4 and CO2 were completed to quantify controls on CO2 and CH4 f

NASA Earthdata CMR + NASA Data Portal1999 · Image data

The BOREAS TF-11 team collected several data sets in their efforts to fully describe the flux and site characteristics at the SSA-Fen site. This data set contains fluxes of methane and carbon dioxide at the SSA fen site measured using static chambers. The measurements were conducted as part of a 2x2 factorial experiment in which we added carbon (300 g m-2 as wheat straw) and nitrogen (6 g m-2 as u