Elementa
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作者:PL Yager , RM Sherrell , SE Stammerjohn ...
来源:[J].Elementa, 2016Elementa
摘要:Polynyas, or recurring areas of seasonally open water surrounded by sea ice, are foci for energy and material transfer between the atmosphere and the polar ocean. They are also climate sensitive, with both sea ice extent and glacial melt influencing their productivity. The A...
作者:Katlyn S. Morris , Gabriela Bucini
来源:[J].Elementa, 2016Elementa
摘要:The impacts of climate change are already affecting the production and profitability of agricultural systems, and these trends are expected to continue in the future. Without support from ecosystem functions, an agricultural system designed exclusively to maximize short-term...
作者:Anne Cristina de la Vega-Leinert , Ludger Brenner , Susanne Stoll-Kleemann
来源:[J].Elementa, 2016Elementa
摘要:Production of low-input, shaded coffee in the Los Tuxtlas UNESCO Biosphere Reserve (LTBR), Veracruz, Mexico, an economically marginalized but ecologically rich region, was strongly affected by the collapse in international prices and the reconfiguration of the Mexican coffee sect...
作者:Ramón A. Alvarez , David R. Lyon , Anthony J. Marchese ...
来源:[J].Elementa, 2016Elementa
摘要:Estimates of methane emissions from natural gas production sites in the United States based on recent studies have been questioned due to possible malfunction of the Bacharach Hi Flow® Sampler (BHFS), the primary measurement instrument used for two out of five source types e...
作者:G. M. Hidy , C.L. Blanchard
来源:[J].Elementa, 2016Elementa
摘要:Sulfur oxides, sulfur dioxide and airborne sulfate, SOx, are short-lived species in the troposphere whose concentrations in air and precipitation have changed dramatically in association with fossil fuel combustion. The historic rise in concentration is coincident with the e...
作者:Antônio Carlos Hummel
来源:[J].Elementa, 2016Elementa
摘要:Brazil has succeeded in reducing deforestation rates in the Amazon, but has not succeeded in explaining to the general public how much of this deforestation was illegal and how much was legally authorized. Transparency of deforestation data is limited, and pertinent legislation i...
作者:Adrienne C. Shelton , William F. Tracy
来源:[J].Elementa, 2016Elementa
摘要:Organic farmers require improved varieties that have been adapted to their unique soils, nutrient inputs, management practices, and pest pressures. One way to develop adapted varieties is to situate breeding programs in the environment of intended use, such as directly on organic...
作者:S. J. Oltmans , A. Karion , R. C. Schnell ...
来源:[J].Elementa, 2016Elementa
摘要:Instrumented aircraft measuring air composition in the Uinta Basin, Utah, during February 2012 and January-February 2013 documented dramatically different atmospheric ozone (O3) mole fractions. In 2012 O3 remained near levels of ∼40 ppb in a well-mixed 500–1000 m deep bounda...
作者:Jan Pollmann , Detlev Helmig , Daniel Liptzin ...
来源:[J].Elementa, 2016Elementa
摘要:Trace gas measurements from whole air samples collected weekly into glass flasks at background monitoring sites within the NOAA Global Greenhouse Gas Reference Network program (with most of the sites also being World Meteorological Organization (WMO) Global Atmospheric Watch...

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